JP4468543B2

JP4468543B2 - Bonding optical element, bonding optical element holding device, and method of manufacturing bonding optical element

Info

Publication number: JP4468543B2
Application number: JP2000099238A
Authority: JP
Inventors: 孝枝林
Original assignee: Olympus Corp
Current assignee: Olympus Corp
Priority date: 2000-03-31
Filing date: 2000-03-31
Publication date: 2010-05-26
Anticipated expiration: 2020-03-31
Also published as: JP2001278642A

Description

【０００１】
【発明の属する技術分野】
本発明は、貼り合わせレンズ、貼り合わせプリズム等の透過光学系に用いられる接合光学素子、特に紫外線顕微鏡対物レンズ等の紫外線領域で使用される接合光学素子と、この接合光学素子の保持装置と、接合光学素子を製造する製造方法に関する。
【０００２】
【従来の技術】
光学系に用いられる接合光学素子の接合には、バルサム、エポキシ系あるいはアクリレート系紫外線硬化型等の接着剤が使用されている。これに対し、近年では、光学技術分野において高精度な分解能が要求されるようになり、観察波長も従来の可視光領域から解像力を向上させることができる紫外光領域を用いるようになり、且つ光学歪みがきわめて少ない光学系が望まれている。
【０００３】
解像度に対しては、凹面や凸面の単体レンズのみで構成するレンズ群よりも、例えば特開平９−２４３９２４号公報や特開平１０−１４２４９８号公報に記載されるように２枚以上のレンズを接合した接合レンズによって構成するレンズ群の方が、解像度が高くでき、レンズ群数も最小限に抑えることが知られている。この接合レンズのような接合光学素子の接合に用いる接着剤として、特開平４−９７９２７号公報や特開平６−２０１９６３号公報には、付加反応硬化する有機シリコーン樹脂を用い、この接着剤によって紫外線領域用接合光学素子を製造することが記載されている。
【０００４】
特開平４−９７９２７号公報は、石英レンズ同士を有機シリコーン樹脂からなる接着剤で接合して接合光学素子とするものである。これにより、接着剤の硬化収縮や温湿度変化により発生する光学歪みを緩和し、且つ、２５０ｎｍ以上の波長において高い透過率を有する接合光学素子としている。
【０００５】
図５は、特開平６−２０１９６３号公報に記載された光学素子保持装置を示す。酸化珪素含有率３０ｗｔ％以上の光学素子２１（例えば石英レンズ）と、酸化珪素含有率３０ｗｔ％未満の光学素子２２（例えば蛍石レンズ）とが有機シリコーン樹脂からなる接着剤２３によって接合されている。そして、酸化珪素含有率３０ｗｔ％未満の光学素子２２側を保持枠２４の内部の奥側にし、酸化珪素含有率３０ｗｔ％以上の光学素子２１を保持枠２４の開口側にし、光学素子同士を接合する接着剤２３と同一の接着剤を用いて、開口側の光学素子２１と保持枠２４とを一体化させている。これにより、接合に寄与する接着剤の接着力をより高く維持するようになっている。
【０００６】
【発明が解決しようとする課題】
しかしながら、特開平４−９７９２７号公報の有機シリコーン樹脂からなる付加反応硬化する接着剤は、石英レンズ同士の接合には良いが、紫外線顕微鏡等に使う酸化珪素含有率が３０ｗｔ％未満の硝材に対しては、極度に接着性が悪く、付加反応型有機シリコーン樹脂からなる接着剤ではこの種の硝材を充分に接着し、保持することができない。
【０００７】
特開平６−２０１９６３号公報においては、光学素子の接合に寄与する接着剤と同一の付加反応型シリコーン樹脂を用い、酸化珪素含有率３０ｗｔ％以上の硝材からなる光学素子２１を介して酸化珪素含有率３０ｗｔ％未満の硝材からなる光学素子２２を保持枠２４に保持させている。しかしながら、付加反応型シリコーン樹脂は、硬化時間が室温で少なくとも１２時間以上必要であり、加熱しても数時間必要である。従って、光学素子の接合に寄与するとともに保持枠への固着に寄与するための接着剤が完全硬化するまでに光軸ズレを発生し易く、完全硬化までには数回にわたる芯出し調整が必要となって、作業性の悪い問題を有している。
【０００８】
本発明は、このような従来の問題点に鑑みてなされたもので、紫外線領域でも使用可能な接合光学素子を接着により充分に保持でき、光学素子を接合する際の芯出しの作業性も良好である接合光学素子および接合光学素子の保持装置および接合光学素子の製造方法を提供することを目的とする。
【０００９】
【課題を解決するための手段】
上記目的を達成するため、請求項１の発明の接合光学素子は、２以上の光学素子が接合された接合光学素子において、接合される各光学素子の接合面間に介在される付加反応硬化型有機シリコーン樹脂からなる接着剤と、接合される各光学素子の接合面近傍であって、前記光学素子の外周面に形成された白金触媒とを有し、前記各光学素子の接合面間からはみ出したはみ出し接着剤と前記白金触媒とが反応して、光学素子の接合面の接着剤よりも、はみ出した接着剤を早く硬化させることを有することを特徴とする。
【００１０】
付加反応型有機シリコーン樹脂は、２液混合型のものである。この有機シリコーン樹脂の主剤は、分子鎖の末端がビニル基のオリゴマーと末端が水素になっているオリゴマーとの混交物である。これに有機系の白金触媒を接触させると、末端のビニル基の部分と水素の部分で付加反応が起こり、結果として有機シリコーン樹脂が硬化する。
【００１１】
請求項１の発明では、光学素子の外周面に形成された白金触媒が付加反応硬化型有機シリコーン樹脂からなるはみ出し接着剤と接触することにより、はみ出し接着剤が光学素子の接合面の接着剤よりも早期に硬化する。このため、光軸ズレが発生しにくく、高い偏芯精度を確保した芯出しができると共に、接合光学素子を短時間で作製することができる。
【００１２】
付加反応型有機シリコーン樹脂は、主鎖骨格がジメチルポリシロキサンであり、これが硬化架橋したときは、高い紫外線透過能を有する石英（ＳｉＯ₂）の骨格に類似しているため、同様に紫外線透過能を発揮する。また、有機シリコーン樹脂の硬化物は、非常に柔軟性に富み、応力を吸収することができる。さらに、付加反応型の有機シリコーン樹脂の体積硬化収縮率は、通常１体積％以下である。したがって、付加反応型の有機シリコーン樹脂を光学素子の接合に用いると、接着剤層での紫外線透過率が高く、硬化収縮が小さく、たとえ応力が発生しても接着剤層の柔軟性で応力を吸収できるので、光学歪を少なくすることができる。
【００１３】
請求項１の発明では、光学素子の接合に寄与する光学素子間の付加反応型有機シリコーン樹脂からはみ出したはみ出し接着剤が形成されており、光学素子の外周面に形成された白金触媒がはみ出し接着剤と反応するため、光学素子の接合に寄与する光学素子間の付加反応型有機シリコーン樹脂が白金触媒と反応することがない。このため、紫外線透過率が良好である付加反応型有機シリコーン樹脂の上述した特性を維持することができる。従って、紫外線領域で良好に使用することができる。
【００１４】
請求項２の発明は、２以上の光学素子が接合された接合光学素子において、接合される各光学素子の接合面間に介在される付加反応硬化型有機シリコーン樹脂からなる接着剤と、前記各光学素子の接合面間からはみ出したはみ出し接着剤を被覆すると共に、はみ出し接着剤と反応した白金触媒と、この反応した白金触媒を被覆すると共に前記接合される接合面に続く各光学素子の外周面と接触する低極性のエネルギー硬化型接着剤とを有することを特徴とする。
【００１５】
低極性とは、物質の凝集エネルギー密度が５０ｃａｌ／ｃｍ³ 以下（溶解度パラメーターＳＰ値が７以下）の性質である。低極性のエネルギー硬化型接着剤としては、粘度が２０００ｍ・Ｐａ以上のシリコーン系、ポリオレフィン系などの低極性紫外線硬化型接着剤を用いることができる。この接着剤は、２０００ｍ・Ｐａ未満の粘度では、光学素子の外周面から流れ落ちてしまうため、２０００ｍ・Ｐａ以上の粘度が良好であり、好ましくは５０００ｍ・Ｐａ以上、１００００ｍ・Ｐａ未満が良好である。１００００ｍ・Ｐａ以上では、硬すぎて接合の作業性が低下する。
【００１６】
この発明では、白金触媒がはみ出し接着剤を被覆するため、請求項１と同様に作用することができる。又、低極性のエネルギー硬化型接着剤が白金触媒及び接合光学素子の外周面を被覆することにより、接合部位を補強するため、さらに、光軸ズレが発生しにくく、高い偏芯精度を確保した芯出しができる。
【００１７】
請求項３の発明は、２以上の光学素子が接合された接合光学素子において、接合される各光学素子の接合面間に介在される付加反応硬化型有機接着剤と、前記各光学素子の接合面間からはみ出した付加反応硬化型有機接着剤からなるはみ出し部を被覆して硬化された低極性のエネルギー硬化型接着剤とを有することをすることを特徴とする。
【００１８】
この発明では、付加反応硬化型有機接着剤からなるはみ出し部を低極性のエネルギー硬化型接着剤が被覆し、早期に硬化するため、はみ出し部及び光学素子の接合部位を補強することができる。
【００１９】
請求項４の発明は、２以上の光学素子が接合された接合光学素子を、少なくともその外周面で保持体に保持する接合光学素子の保持装置において、前記接合光学素子の接合面及び接合面に続く各光学素子の外周面が露呈するように前記接合光学素子の１つを保持する保持体と、接合される各光学素子の接合面間に介在される付加反応型有機シリコーン樹脂からなる接着剤と、接合される各光学素子の接合面近傍であって、前記光学素子の外周面に形成された白金触媒とを有し、前記各光学素子の接合面間からはみ出したはみ出し接着剤と前記白金触媒とが反応して、光学素子の接合面の接着剤よりも、はみ出した接着剤を早く硬化させることを特徴とする。
【００２０】
請求項５の発明は、２以上の光学素子が接合された接合光学素子を、少なくともその外周面で保持体に保持する接合光学素子の保持装置において、前記接合光学素子の接合面および接合面に続く各光学素子の外周面が露呈するように前記接合光学素子の１つを保持する保持体と、接合される各光学素子の接合面間に介在される付加反応硬化型有機シリコーン樹脂からなる接着剤と、前記各光学素子の接合面間からはみ出したはみ出し接着剤を被覆すると共に、はみ出し接着剤と反応した白金触媒と、この反応した白金触媒を被覆するとともに前記接合される接合面に続く各光学素子の外周面と接触する低極性のエネルギー硬化型接着剤とを有することを特徴とする。
【００２１】
請求項６の発明は、２以上の光学素子が接合された接合光学素子を、少なくともその外周面で保持体に保持する接合光学素子の保持装置において、前記接合光学素子の接合面および接合面に続く各光学素子の外周面が露呈するように前記接合光学素子の１つを保持する保持体と、接合される各光学素子の接合面間に介在される付加反応硬化型有機接着剤と、前記各光学素子の接合面間からはみ出した付加反応硬化型有機接着剤からなるはみ出し部を被覆して硬化させた低極性のエネルギー硬化型接着剤とを有することを特徴とする。
【００２２】
以上の請求項４〜６の発明では、保持体が、光軸ズレが発生しにくく、高い偏芯精度を確保した芯出しが可能な状態で接合光学素子を保持することができる。又、紫外線透過率が良好である状態で接合光学素子を保持することができる。
【００２３】
請求項７の発明は、２以上の光学素子が接合される接合光学素子の製造方法において、第１の光学素子の接合面に、付加反応硬化型有機接着剤を液滴する工程と、液滴した付加反応硬化型有機接着剤を第２の光学素子の接合面による加圧によって接合面全体に広げると共に、付加反応硬化型有機接着剤の一部を接合面からはみ出させてはみ出し部を形成する工程と、前記第１と第２の光学素子の芯出し作業を行って、所望の芯出しをする工程と、前記接合面からはみ出したはみ出し部を、各光学素子の接合面間の付加反応硬化型有機接着剤よりも先に硬化させる工程と、を有することを特徴とする。
【００２４】
請求項８の発明は、２以上の光学素子が接合させる接合光学素子の製造方法において、
第１の光学素子の接合面に、付加反応硬化型有機接着剤を液滴する工程と、
液滴した付加反応硬化型有機接着剤を第２の光学素子の接合面による加圧によって接合面全体に広げると共に、付加反応硬化型有機接着剤の一部を接合面からはみ出させてはみ出し部を形成する工程と、
前記第１と第２の光学素子の芯出し作業を行って、所望の芯出しをする工程と、
前記接合面からはみ出したはみ出し部を被覆すると共に、前記各接合面に続く各光学素子の外周面と接触して接合面間に付加反応硬化型有機接着剤を密閉する低極性のエネルギー硬化型接着剤からなる接着剤層を形成する工程と、を有することを特徴とする。
【００２５】
請求項７及び８の発明では、紫外線領域の透過率が良好で、しかも良好な偏芯精度で芯出した接合光学素子を短時間で製造することができる。
【００２６】
【発明の実施の形態】
以下、本発明を図示する実施の形態により具体的に説明する。なお、各実施の形態において、同一の要素は同一の符号を付して対応させてある。
【００２７】
（実施の形態１）
図１は本発明の実施の形態１であり、接合光学素子は、紫外線透過率の高い酸化珪素含有率が３０ｗｔ％以上である石英レンズ１と、酸化珪素含有率が３０ｗｔ％未満である蛍石レンズ２とを有している。この接合光学素子は、石英レンズ１の外周面の内、略下側半分がシリコーン系紫外線硬化型接着剤４により金属製の保持枠５に固定されている。金属製の保持枠５に保持されることにより、保持装置が構成されている。
【００２８】
保持枠５に固定された石英レンズ１上には、凝集エネルギー密度（ＣＥＤ）が５０ｃａｌ／ｃｍ^３以下（溶解度パラメーターＳＰ値が７以下）である低極性材料としての付加反応型有機シリコーン樹脂からなる接着剤３を介在して蛍石レンズ２が貼り合わされている。石英レンズ１と蛍石レンズ２の接合面に続くそれぞれのレンズ外周面６ａ，６ｂは、略２ｍｍ幅の輪帯状となっている白金触媒７の層がそれぞれ形成されている。又、石英レンズ１と蛍石レンズ２の接合面から各外周面６ａ，６ｂには、はみ出し接着剤３ａがはみ出しており、各外周面６ａ，６ｂに形成された白金触媒７とはみ出したはみ出し接着剤３ａにより、各接合面に続くレンズ外周面６ａ，６ｂ付近でも石英レンズ１と蛍石レンズ２が固定されている。
【００２９】
この実施の形態において、レンズ外周面６ａ，６ｂに塗布した白金触媒７としては、商品名「ＫＥ−９３−４０５」（信越化学工業（株）製）を用いた。付加反応型有機シリコーン接着剤としては、２液混合タイプである商品名「ＫＥ１０９Ｅ」（信越化学工業（株）製）を用いた。この付加反応型有機シリコーン樹脂は、有機シリコーン樹脂のＡ液（主剤）とＢ液（硬化触媒）とを、１：１の混合比で計り採り、これらを攪拌棒により均一に混合した後、１０分間常温放置して自然脱泡し、さらに減圧機により減圧下で脱泡したものを用いた。
【００３０】
この実施の形態の接合光学素子の保持装置を製造するには、中心部が貫通した筒部５ｂの内面に、内側に向けた段部５ａを形成することにより保持枠５を形成する。段部５ａは石英レンズ１が載置されるものであり、段部５ａを境とした筒部５ｂの上部側の軸方向の長さは石英レンズ１の外周面の長さの略半分となっている。
【００３１】
この保持枠５内に凹球面の石英ガラス１を落とし込み、保持枠５内周と石英レンズ１外周により形成されるクリアランスに、粘度が２０００ｍ・Ｐａのシリコーン系紫外線硬化型接着剤４を流入する。なお、クリアランスに対する接着剤４の供給は、石英ガラス１の外周の略下側半分に予め接着剤４を塗布した後に、石英ガラス１を保持枠５内に落とし込む手順により行っても良い。
【００３２】
次に、不図示の芯出し装置によって保持枠５に対する石英レンズ１の芯出し作業を行い、偏芯精度を１′以内とする。この芯出しの後に紫外線を接着剤４に照射し硬化させる。この時点の硬化は、芯ズレが生じない程度の仮硬化を行うものであり、紫外線導光用ライトガイドにより３０ｍｗ／ｃｍ²の紫外線強度で２０秒照射を行う。その後、室温で２４時間放置して本硬化させる。
【００３３】
次に、保持枠５上の石英レンズ１の接合面に続くレンズ外周面６ａの略２ｍｍ幅に白金触媒７を塗布する。白金触媒７の塗布は、石英レンズ１の上に接合される蛍石レンズ２の接合面に続くレンズ外周面６ｂの略２ｍｍ幅に対しても行う。この塗布後、石英レンズ１の接合面の中央付近に付加反応有機シリコーン樹脂からなる接着剤３を液滴し、ついでこの上に蛍石レンズ２を合わせて接着剤３を蛍石レンズ２の上面側からの加圧によって接合面全体に広げるとともに、その一部を接合面から各レンズの外周面６ａ，６ｂへはみ出させる。
【００３４】
このはみ出しによって形成されたはみ出し接着剤３ａは、各レンズ１，２の外周面６ａ，６ｂに塗布された白金触媒７と反応し、はみ出し接着剤の硬化速度が速くなり、数分でゲル状態になって２つのレンズ１、２の相対位置がずれないようになる。従って、はみ出し接着剤３ａが形成された直後に、例えばベル芯出し装置により蛍石レンズ２の芯出し作業を行い、偏芯精度が１′以内となるように蛍石レンズ２の芯出し作業を行い、偏芯精度が１´以内になるように蛍石レンズ２を芯出し調整し、芯出し装置に取り付けたままで室温硬化させる。これにより、接合光学素子の保持装置を作製する。
【００３５】
硬化後の付加反応型有機シリコーン接着剤は、ゴム状の硬化物であって、ＪＩＳＡ３０〜４０であった。また、接合に寄与する接着剤の層厚は１０μｍであった。この厚さは、５〜１５μｍの範囲で設定されていたので望ましい範囲内となっている。
【００３６】
なお、はみ出し接着剤３ａのはみ出し量の約２倍を各レンズ外周面６ａ，６ｂへの白金触媒７の塗布量とするのが好ましく、予め各レンズ接合面に続くレンズ外周面６ａ，６ｂに塗布した塗布量が少ない場合は、接着剤３を各レンズ１，２の接合面全体に広げるとともに各レンズの外周面６ａ，６ｂへ接着剤をはみ出させた後に、図２に示すように、はみ出し接着剤３ａのはみ出し上に（すなわち、はみ出し接着剤３ａの上から）追加的に白金触媒７ａを再度塗布しても良い。
【００３７】
この場合、白金触媒７の塗布量が、はみ出し接着剤３ａのはみ出し量の１．５倍以下では硬化加速度が少し遅くなる。一方、２．５倍を越える場合には、白金触媒が付加反応型有機シリコーン接着剤と反応せずに液体のままで各レンズの外周面に残る量が多くなり外観を損ねる可能性がある。従って、付加反応型有機シリコーン接着剤が室温硬化した後に、白金触媒の拭き取り作業が必要となる。
【００３８】
なお、レンズの保持枠５への落とし込み及び接合の順序としては、蛍石レンズ２が保持枠５へ固定され、石英レンズ１が蛍石レンズ２上に接合される場合であっても良い。
【００３９】
このように石英レンズ１上に液滴された接着剤３がレンズ２を貼り合わせることにより加圧されて、接合に寄与する接着剤が接合面の全面に均一に広がるとともにレンズ接合面に続く外周面６ａ，６ｂへその一部がはみ出し接着剤３ａとしてはみ出し、このはみ出し接着剤３ａが予めレンズ外周部６ａ，６ｂに塗布した白金触媒７と接触して反応して、はみ出し接着剤３ａの硬化が促進されるため、接合レンズ（接合光学素子）の位置決め固定が早くなり、このため、光軸ズレが発生しにくくなる。
【００４０】
この実施の形態では、接合するレンズ１，２の各レンズ外周面６ａ、６ｂに白金触媒７を塗布することにより、白金触媒７が各レンズ外周面にはみ出したはみ出し接着剤３ａとだけ反応する。このため、白金触媒７は接合レンズの各有効径内に介在する接着剤３（すなわち、接合に寄与する接着剤）とは反応しない。これにより、この接合レンズあるいは接合光学素子の保持装置に組み込まれた接合レンズを、紫外線顕微鏡に組み込んで使用した場合であっても紫外線によって変色して透過率を損ねることがなくなる。
【００４１】
また、各レンズを接合する際に、はみ出したはみ出し接着剤が早期に硬化するため、光軸ズレが発生しにくくなって高偏芯精度を確保できる。このため、作業性が良好になり、作業時間を短縮できる。さらに、接合に寄与する接着剤３及び偏芯精度確保のためのはみ出し接着剤３ａが同じシリコーン接着剤であるため、接合レンズにおける光学歪みの発生を抑制できる。
【００４２】
（実施の形態２）
図３は本発明の実施の形態２を示す。この実施の形態では、紫外線透過率の高い酸化珪素含有率が３０ｗｔ％以上である第１の石英レンズ１と、酸化珪素含有率が３０ｗｔ％未満である蛍石レンズ２と、第１の石英レンズ１と同様の含有率の第２石英レンズ１０とから接合光学素子（接合レンズ）が形成されている。又、第１の石英レンズ１の外周面のうちの略４分の３がシリコーン系紫外線硬化型接着剤４により金属製の保持枠５に固定されている。
【００４３】
第１の石英レンズ１、蛍石レンズ２および第２の石英レンズ１０の各接合面の間には、凝集エネルギー密度（ＣＥＤ）が５０ｃａｌ／ｃｍ^３以下（溶解度パラメーターＳＰ値が７以下）である低極性接着剤としての付加反応型有機シリコーン樹脂が接合に寄与する接着剤３として介在させて貼り合わされている。また、第１の石英レンズ１と蛍石レンズ２および第２の石英レンズ１０の各接合面間から各レンズの接合面に続く外周面６ａ、６ｂ、６ｃには、はみ出したはみ出し接着剤３ａ、３ｂが設けられている。
【００４４】
このはみ出し接着剤３ａ、３ｂの外側には、はみ出し接着剤３ａ、３ｂを被覆するとともに各外周面６ａ、６ｂ、６ｃにも接触部を有するようにして白金触媒７が塗布されている。そして、この白金触媒７の全体を被覆する（シーリングする）とともに、各外周面６ａ、６ｂ、６ｃにも接着面を有するようにして接着剤８が塗布されている。接着剤８としては、紫外線硬化性付与の低極性である縮合型シリコーン系接着剤が使用されている。
【００４５】
この実施の形態では、各レンズ１，２，１０間を接合する付加反応型有機シリコーン樹脂からなる接着剤３として、２液混合タイプの商品名「ＫＥ１０９Ｅ」（信越化学工業（株）製）を用いた。また白金触媒として、商品名「ＫＥ−９３−４０５」（信越化学工業（株）製）を用いた。また、縮合型シリコーン接着剤８として、商品名「ＫＥ４８３５」（信越化学工業（株）製）を用いた。
【００４６】
この実施の形態の接合光学素子の保持装置を製造するには、中心部が貫通した筒部５ｂの内面に、内側に向けた段部５ａを形成することにより保持枠５を形成する。この場合、筒部５ｂの軸方向の長さは、石英レンズ１の外周面の長さより少し短くなっている。
【００４７】
この保持枠５内に、両凸形状の第１の石英レンズ１を落とし込み、保持枠５の内周面と第１の石英レンズ１の外周面により形成されるクリアランス（間隙）内に、２０００ｍ・Ｐａ粘度のシリコーン系紫外線硬化型接着剤４を流入する。ついで、不図示の芯出し装置によって、保持枠５に対する第１の石英レンズ１の芯出し作業を行い、偏芯精度を１′以内とし、この芯出しの後に紫外線を紫外線硬化型接着剤４に照射して硬化させる。この硬化に際しては、当初は芯ズレが生じない仮硬化のために、紫外線導光用ライトガイドで光強度３０ｍｗ／ｃｍ^２の紫外線を２０秒間照射し、その後、３０００ｍｊ／ｃｍ^２の光量を照射して本硬化した。この時間や光強度は適宜に設定される。そして、この組立体を芯出し装置から解放した。
【００４８】
次に、第１の石英レンズ１の上に、付加反応型有機シリコーン樹脂からなる接着剤３を２０００ｍＰａ・ｓ〜１００００ｍＰａ・ｓの間の粘度に選択して液滴し、次いで蛍石レンズ２を貼り合わせながら、接着剤３を蛍石レンズ２の上面側からの加圧によって接合面全体に広げるとともに、一部を接合面から各レンズ１、２の外周面６ａ、６ｂへはみ出させる。このはみ出しによって凸状のはみ出し接着剤３ａが形成される。
【００４９】
その後、再度芯出し装置、例えばベル芯出し装置によって第１の石英レンズ１と蛍石レンズ２との芯出し作業を行い、偏芯精度を１′以内にし、芯出し装置に取り付けたままで、はみ出し接着剤３ａを被覆するように白金触媒７を塗布する。この白金触媒７の塗布によりはみ出し接着剤３ａの硬化速度が促進され、はみ出し接着剤３ａが数分でゲル状態となって２つのレンズ１、２の位置ズレがないように固定される。
【００５０】
次に、はみ出し接着剤３ａに塗布した白金触媒７の表面及び各レンズ１、２の外周面６ａ、６ｂにも接着面を形成するようにして、縮合型シリコーン系接着剤８を塗布する。急激な硬化による内部の応力歪が発生しないようにするため、縮合型シリコーン系接着剤８を紫外線ライトガイドにより光強度３０ｎｍ／ｃｍ²の紫外線を２０秒照射して仮硬化を行い、次いで紫外線硬化装置により３０００ｍｊ／ｃｍ²の光量を与えて本硬化した。そして芯出し装置を一旦、第１の石英レンズ１と蛍石レンズ２から解放する。この場合、縮合型シリコーン系接着剤８と保持枠５にあらかじめ用いた接着剤４とは連続していた。
【００５１】
その後、蛍石レンズ２の上面に、上述と同じ付加反応型有機シリコーン樹脂からなる接着剤３を液滴し、その上に第２の石英レンズ１０を貼り合わせながら、第２の石英レンズ１０の上面側からの加圧によって、接着剤３を接着面全体に広げるとともに一部を接合面から各レンズ２、１０の外周面６ｂ、６ｃへはみ出させる。このはみ出しによってはみ出し接着剤３ｂが形成される。
【００５２】
はみ出し接着剤３ｂが形成された後、例えばベル芯出し装置によって蛍石レンズ２を含む接合レンズと第２の石英レンズ１０との芯出し作業を行い、偏心精度を１′以内にする。そして、偏心精度１′以内の状態で芯出し装置に取り付けたまま、はみ出し接着剤３ｂを被覆するように白金触媒７を塗布する。この白金触媒７の塗布により、はみ出し接着剤３ｂの硬化速度が促進され、はみ出し接着剤３ｂが数分でゲル状態となって、位置ズレがなく第２の石英レンズ１０の接合が行われる。
【００５３】
次いで、はみ出し接着剤３ｂに塗布した白金触媒７の表面及び各レンズ２、１０の外周面６ｂ、６ｃにも接着面を形成するようにして、縮合型シリコーン系接着剤８を塗布する。この接着剤８の仮硬化を行い、その後に本硬化を行った後、芯出し装置を解放した。
【００５４】
その後、第１の石英レンズ１、蛍石レンズ２および第２の石英レンズ１０が接合された接合レンズを保持した保持枠５における付加反応型有機シリコーン樹脂からなる接着剤、すなわち各レンズの接合面間における接合に寄与する接着剤３を室温硬化させて本実施の形態の接合光学素子の保持装置を得た。
【００５５】
（実施の形態３）
図４は実施の形態４を示す。この実施の形態における保持装置は、レンズ接合面に続くレズ外周面６ａ、６ｂにはみ出した接合レンズ間の付加反応型有機シリコーン樹脂からなる接着剤のはみ出し接着剤３ａの表面を、接着剤９によって被覆するものである。接着剤９としては、有機シリコーン樹脂からなる接着剤３と同じく、低極性の接着剤であるポリオレフィン系紫外線硬化型接着剤を使用した。この紫外線硬化型接着剤９としては、粘度４０００ｍ・Ｐａの商品名「ＸＶＬ−０９」（共立化学産業（株）製）を用いた。また、付加反応型有機シリコーン樹脂からなる接着剤３は、上述と同様の２液混合タイプの商品名「ＫＥ１０９Ｅ」（信越化学工業（株）製）を用いた。
【００５６】
この実施の形態の保持装置の製造は、実施の形態１と同様にして、保持枠５に石英レンズ１を固定する。そして保持枠５に固定された石英レンズ１の接合面に付加反応型シリコーン樹脂からなる接着剤３を液滴し、蛍石レンズ２を貼り合わせて接着剤３を接合面全体に広げ、上下の各レンズの外周面６ａ、６ｂへ接着剤をはみ出し接着剤３ａとしてはみ出させる。その後、芯出し装置を用いて蛍石レンズ２の芯出し作業を行い、偏心精度を１′以内にする。
【００５７】
そして、芯出し装置により芯出ししたままで、各レンズ接合面よりはみ出したはみ出し接着剤３を被覆し、且つ各レンズの外周面にも被覆するように低極性のポリオレフィン系紫外線接着剤９でシーリングする。この接着剤９の急激な硬化による応力歪が接着剤９に発生しないようにするため、紫外線ライトガイドから３０ｍｗ／ｃｍ^２の紫外線強度で６０秒以上の照射による仮硬化を行った後、紫外線硬化装置で３０００ｍｊ／ｃｍ^２の光量を与えて本硬化させた。その後、接合レンズを保持した保持枠５を芯出し装置から取り外して、付加反応型シリコーン接着剤３を室温硬化させて、本実施の形態の接合光学素子の保持装置を得た。
【００５８】
この実施の形態では、紫外線硬化型接着剤９の塗布量はレンズ接合面からはみ出したはみ出し接着剤３の少なくとも２倍以上とする。紫外線硬化型接着剤９の塗布量が少ない場合には、はみ出し接着剤３と混合し易くなって、紫外線に反応しにくくなり、紫外線による硬化時間が長くなり、接着力が低下するためである。
【００５９】
なお、この実施の形態では、蛍石レンズ２の芯出し作業を偏心精度１′以内とし、芯出し装置により芯出ししたままで接合作業を継続したが、これに限らず、蛍石レンズ２の芯出し作業を偏芯精度１′付近にしてはみ出し接着剤３ａを形成し、このはみ出し接着剤３ａおよび各レンズの外周面（各レンズの接合面に続く外周面）６ａ、６ｂを低極性ポリオレフィン系紫外線型接着剤９によって被覆した後に硬化する際に、偏芯精度を１′以内で芯出しするようにしても良い。
【００６０】
この実施の形態では、低極性の紫外線硬化型接着剤９が、レンズ接合面の外周側にはみ出した低極性のシリコーン樹脂からなるはみ出し接着剤３ａを被覆し、且つ各レンズの外周面６ａ、６ｂとも接触してシーリング剤として機能する。この低極性の紫外線硬化型接着剤９は紫外線で早く硬化し、低極性であるシリコーン接着剤３と接着されると同時に、レンズ１および２の各接合面に続く外周面６ａ、６ｂにも接着される。このため、各レンズ１、２の接合面に介在されて接合に寄与する接着剤および各レンズ１、２の外周側にはみ出した接着剤３ａおよびこのはみ出し接着剤３ａの上に塗布されてレンズ１、２の外周面とも接触する紫外線硬化型接着剤９により接合が補強される。
【００６１】
また、シーリング剤として機能する紫外線硬化型接着剤９が、低極性の付加反応型有機シリコーン樹脂からなる接着剤と同様の低極性接着剤であるため、はみ出したはみ出し接着剤３ａとの接着が可能となり、早期の硬化により高偏芯精度を確保できる。
【００６２】
なお、接着剤としては付加反応型シリコーン接着剤３に代えて、シリコーン粘着剤、シリコーングリス、シリコーンオイル等透明な低極性材料を用いても良い。このような低極性材料は、各レンズの接合面間で硬くならないことから、各レンズの接合面間に介在させた後に、芯出し装置により偏芯精度１′付近までの芯出し作業を行ってはみ出し部（はみ出し材料部）を形成し、芯出し装置による芯出ししたままで、はみ出し部の表面および各レンズの外周面にも及ぶようにして、低極性のポリオレフィン系紫外線型接着剤９を塗布し、その後、偏芯精度を１′以内の芯出し作業をし、芯出し装置による芯出しを継続したままで仮硬化及び本硬化を行って、はみ出し部を被覆する接着剤９を硬化させて接合レンズを形成してもよい。
【００６３】
上記各実施の形態では、付加反応型有機シリコーン樹脂からなる接着剤として、２液混合タイプの商品名「ＫＥ１０９Ｅ」（信越化学工業（株）製）を用いたが、これに限らず商品名「シルポット１８４」（ダウコーニング（社）製）を用いてもよい。シルポット１８４の場合には、シルポット１８４の主剤１０部に対し、白金系の硬化触媒（シルポット１８４w／ｃ）１部を計り採り、これらを攪拌棒により均一に混合した後、１０分間常温放置して自然脱泡し、さらに減圧脱泡機により減圧下で脱泡したものを用いても良い。
【００６４】
また、各実施の形態では、石英レンズとして酸化珪素含有率が３０ｗｔ％以上、蛍石レンズとして酸化珪素含有率が３０ｗｔ％未満のものを接合したが、石英レンズ同士の接合、あるいは蛍石レンズ同士の接合にも適用することができる。酸化珪素含有率３０ｗｔ％未満のものとしては、ＦＰＬ５１、ＦＰＬ５２、ＦＰＬ５３（いずれも含有率０ｗｔ％）、ＬＡＬ６１（３ｗｔ％）、ＬＡＬ１８（５ｗｔ％）、ＬＡＭ２（１０〜２０ｗｔ％）、ＬＡＨ６６（５〜１０ｗｔ％）（いずれもオハラ（社）製の商品名）を使用し、酸化珪素含有率３０ｗｔ％以上のものとしては、ＢＳＬ７（７０ｗｔ％）、ＢＡＬ１１（４８ｗｔ％）、ＮＳＬ２（６７ｗｔ％）、ＢＡＭ１（５６ｗｔ％）、ＰＢＬ１（５９ｗｔ％）、ＢＡＬ４（４９ｗｔ％）、石英（１００％）等を使用することができる。
【００６５】
以上の説明から、本発明は、以下の発明を包含するものである。
【００６６】
（付記）
（１）２以上の光学素子を接合した接合光学素子を、少なくともその側面で保持体に保持する光学素子保持装置において、接合光学素子間に介在する接着剤が低極性材料であり、前記接合された接合光学素子の外周面を覆う接着剤が低極性を有する接着剤又はエネルギー硬化型接着剤であることを特徴とする光学素子保持装置。
【００６７】
（２）２以上の光学素子外周面を覆う接着剤が、シリコーン系、ポリオレフィン系などの低極性の紫外線硬化型接着剤であることを特徴とする上記（１）項記載の光学素子保持装置。
【００６８】
（３）接合光学素子の外周面に白金触媒層を形成したことを特徴とする上記（１）項１記載の光学素子保持装置。
【００６９】
（４）光学素子接合面の間に介在する接合剤が、シリコーン粘着剤、シリコーングリス、シリコーンオイルなど有機系シリコーン材料であることを特徴とする上記（１）項１記載の光学素子保持装置。
【００７０】
【発明の効果】
以上説明したように、請求項１〜３の発明の接合光学素子によると、紫外線透過率が良好で、光軸ズレが発生しにくく、高い偏芯精度を確保した芯出しができる接合光学素子とすることができる。
【００７１】
請求項４〜６の発明によると、光軸ズレが発生しにくく、高い偏芯精度を確保した芯出しが可能で、しかも紫外線透過率が良好な接合光学素子を保持することができる。
【００７２】
請求項７及び８の発明によると、紫外線領域の透過率が良好で、しかも良好な偏芯精度で芯出した接合光学素子を短時間で製造することができる。
【図面の簡単な説明】
【図１】本発明の実施の形態１における接合光学素子の保持装置を示す断面図である。
【図２】実施の形態１の別の形態を示す断面図である。
【図３】本発明の実施の形態２における接合光学素子の保持装置を示す断面図である。
【図４】本発明の実施の形態３における接合光学素子の保持装置を示す断面図である。
【図５】従来の光学素子の保持装置を示す断面図である。
【符号の説明】
１石英レンズ
２蛍石レンズ
３接着剤
３ａはみ出し接着剤
７白金触媒[0001]
BACKGROUND OF THE INVENTION
The present invention is a bonding optical element used in a transmission optical system such as a bonding lens and a bonding prism, in particular, a bonding optical element used in an ultraviolet region such as an ultraviolet microscope objective lens, a holding device for the bonding optical element, The present invention relates to a manufacturing method for manufacturing a bonded optical element.
[0002]
[Prior art]
An adhesive such as a balsam, epoxy, or acrylate ultraviolet curable adhesive is used for bonding optical elements used in the optical system. On the other hand, in recent years, high precision resolution has been required in the optical technology field, and the observation wavelength has come to use an ultraviolet light region capable of improving the resolution from the conventional visible light region, and optical. An optical system with very little distortion is desired.
[0003]
In terms of resolution, two or more lenses are joined as described in, for example, Japanese Patent Application Laid-Open No. 9-243924 and Japanese Patent Application Laid-Open No. 10-142498, rather than a lens group composed only of concave and convex single lenses. It is known that the lens group constituted by the cemented lens can have higher resolution and minimize the number of lens groups. JP-A-4-97927 and JP-A-6-201963 use an organic silicone resin that undergoes addition reaction curing as an adhesive used for joining a cemented optical element such as this cemented lens. It describes that a junction optical element for a region is manufactured.
[0004]
Japanese Patent Laid-Open No. 4-97927 discloses a bonded optical element in which quartz lenses are bonded to each other with an adhesive made of an organic silicone resin. Thereby, the optical distortion generated by the curing shrinkage of the adhesive and the change in temperature and humidity is alleviated, and the bonded optical element has a high transmittance at a wavelength of 250 nm or more.
[0005]
FIG. 5 shows an optical element holding device described in JP-A-6-201963. An optical element 21 (for example, a quartz lens) having a silicon oxide content of 30 wt% or more and an optical element 22 (for example, a fluorite lens) having a silicon oxide content of less than 30 wt% are joined together by an adhesive 23 made of an organic silicone resin. . Then, the optical element 22 side with a silicon oxide content of less than 30 wt% is the inner side of the holding frame 24, the optical element 21 with a silicon oxide content of 30 wt% or more is the opening side of the holding frame 24, and the optical elements are bonded together The optical element 21 on the opening side and the holding frame 24 are integrated using the same adhesive as the adhesive 23 to be used. Thereby, the adhesive force of the adhesive which contributes to joining is maintained higher.
[0006]
[Problems to be solved by the invention]
However, the addition reaction-curing adhesive composed of an organic silicone resin disclosed in Japanese Patent Application Laid-Open No. 4-97927 is good for bonding quartz lenses, but for a glass material having a silicon oxide content of less than 30 wt% used for an ultraviolet microscope or the like. Therefore, the adhesiveness is extremely poor, and an adhesive made of an addition reaction type organic silicone resin cannot sufficiently adhere and hold this type of glass material.
[0007]
In JP-A-6-201963, the same addition-reactive silicone resin as the adhesive that contributes to the joining of optical elements is used, and silicon oxide is contained through the optical element 21 made of a glass material having a silicon oxide content of 30 wt% or more. An optical element 22 made of a glass material with a rate of less than 30 wt% is held by a holding frame 24. However, the addition reaction type silicone resin requires a curing time of at least 12 hours or more at room temperature, and requires several hours even if heated. Therefore, optical axis misalignment is likely to occur until the adhesive that contributes to the bonding of the optical elements and contributes to the fixing to the holding frame is completely cured, and several alignment adjustments are required before complete curing. Therefore, it has a problem of poor workability.
[0008]
The present invention has been made in view of such conventional problems, and can sufficiently hold a bonded optical element that can be used even in the ultraviolet region by bonding, and also has good workability in centering when bonding the optical element. It is an object of the present invention to provide a bonding optical element, a holding apparatus for the bonding optical element, and a method for manufacturing the bonding optical element.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the bonded optical element of the invention of claim 1 is an addition reaction curable type interposed between the bonding surfaces of the optical elements to be bonded in the bonded optical element in which two or more optical elements are bonded. An adhesive made of an organic silicone resin; In the vicinity of the bonding surface of each optical element to be bonded, and having a platinum catalyst formed on the outer peripheral surface of the optical element, A protruding adhesive that protrudes from between the bonding surfaces of the optical elements; The platinum catalyst reacts to cure the protruding adhesive faster than the adhesive on the bonding surface of the optical element. It is characterized by having.
[0010]
The addition reaction type organic silicone resin is of a two-component mixed type. The main component of the organic silicone resin is a mixture of an oligomer having a vinyl chain at the end of the molecular chain and an oligomer having a hydrogen at the end. When an organic platinum catalyst is brought into contact with this, an addition reaction occurs at the terminal vinyl group portion and hydrogen portion, and as a result, the organic silicone resin is cured.
[0011]
In the invention of claim 1, Formed on the outer peripheral surface of the optical element When the platinum catalyst comes into contact with the protruding adhesive made of addition reaction curable organosilicone resin, the protruding adhesive becomes Than the adhesive on the joint surface of the optical element Hardens early. For this reason, optical axis misalignment hardly occurs, centering with high decentering accuracy can be performed, and a bonded optical element can be manufactured in a short time.
[0012]
The addition reaction type organosilicone resin has a main chain skeleton of dimethylpolysiloxane, and when this is cured and crosslinked, quartz (SiO ₂ ) Is similar to the skeleton of), and similarly exhibits the ability to transmit ultraviolet light. Moreover, the cured product of the organic silicone resin is very flexible and can absorb stress. Furthermore, the volume cure shrinkage of the addition reaction type organic silicone resin is usually 1% by volume or less. Therefore, when an addition reaction type organic silicone resin is used for joining optical elements, the ultraviolet ray transmittance in the adhesive layer is high, the curing shrinkage is small, and even if stress is generated, the stress is generated by the flexibility of the adhesive layer. Since it can absorb, optical distortion can be reduced.
[0013]
In the invention of claim 1, a protruding adhesive that protrudes from the addition reaction type organic silicone resin between the optical elements contributing to the bonding of the optical elements is formed, Formed on the outer peripheral surface of the optical element Since the platinum catalyst protrudes and reacts with the adhesive, the addition reaction type organosilicone resin between the optical elements contributing to the bonding of the optical elements does not react with the platinum catalyst. For this reason, the above-described characteristics of the addition reaction type organic silicone resin having a good ultraviolet transmittance can be maintained. Therefore, it can be used favorably in the ultraviolet region.
[0014]
According to a second aspect of the present invention, there is provided a bonded optical element in which two or more optical elements are bonded, an adhesive comprising an addition reaction curable organic silicone resin interposed between the bonding surfaces of the optical elements to be bonded, Covering the protruding adhesive that protrudes from between the bonding surfaces of the optical elements, and the platinum catalyst that has reacted with the protruding adhesive, and the outer peripheral surface of each optical element that covers the bonded platinum catalyst and follows the bonded surface to be bonded And a low-polarity energy curable adhesive in contact with the substrate.
[0015]
Low polarity means that the cohesive energy density of a substance is 50 cal / cm ^Three The following properties (the solubility parameter SP value is 7 or less). As the low-polarity energy curable adhesive, a low-polarity ultraviolet curable adhesive such as a silicone or polyolefin having a viscosity of 2000 m · Pa or more can be used. Since this adhesive flows down from the outer peripheral surface of the optical element at a viscosity of less than 2000 m · Pa, the viscosity of 2000 m · Pa or more is good, preferably 5000 m · Pa or more and less than 10,000 m · Pa. . If it is 10000 m · Pa or more, it is too hard and the workability of joining is lowered.
[0016]
In the present invention, since the platinum catalyst covers the protruding adhesive, it can act in the same manner as in the first aspect. In addition, a low-polarity energy curable adhesive coats the platinum catalyst and the outer peripheral surface of the bonding optical element to reinforce the bonding portion, so that optical axis misalignment is less likely to occur and high eccentricity accuracy is ensured. Centering is possible.
[0017]
The invention of claim 3 is a bonded optical element in which two or more optical elements are bonded, and is interposed between the bonding surfaces of the optical elements to be bonded. Addition reaction curable organic adhesive And protruding from between the joint surfaces of each optical element Addition reaction curable organic adhesive And a low-polarity energy curable adhesive that is cured by covering the protruding portion.
[0018]
In this invention, Addition reaction curable organic adhesive Since the low-curing energy curable adhesive is coated on the protruding portion and is cured early, the protruding portion and the joining portion of the optical element can be reinforced.
[0019]
According to a fourth aspect of the present invention, there is provided a bonded optical element holding device for holding a bonded optical element in which two or more optical elements are bonded to a holding body at least on the outer peripheral surface thereof. A holding body for holding one of the bonded optical elements so that the outer peripheral surface of each subsequent optical element is exposed, and an adhesive comprising an addition reaction type organic silicone resin interposed between the bonded surfaces of the optical elements to be bonded When, In the vicinity of the bonding surface of each optical element to be bonded, and having a platinum catalyst formed on the outer peripheral surface of the optical element, A protruding adhesive that protrudes from between the bonding surfaces of the optical elements; The platinum catalyst reacts to cure the protruding adhesive faster than the adhesive on the bonding surface of the optical element. It is characterized by that.
[0020]
According to a fifth aspect of the present invention, there is provided a bonded optical element holding device that holds a bonded optical element in which two or more optical elements are bonded to a holding body at least on the outer peripheral surface thereof. A holding body that holds one of the bonded optical elements so that an outer peripheral surface of each subsequent optical element is exposed, and an adhesion formed of an addition reaction curable organic silicone resin that is interposed between the bonded surfaces of the optical elements to be bonded And an adhesive that protrudes from between the bonding surfaces of the optical elements, and a platinum catalyst that has reacted with the protruding adhesive, and a coating that covers the reacted platinum catalyst and that follows the bonded surface to be bonded. It has a low-polarity energy curable adhesive in contact with the outer peripheral surface of the optical element.
[0021]
According to a sixth aspect of the present invention, there is provided a bonded optical element holding device that holds a bonded optical element in which two or more optical elements are bonded to a holding body at least on the outer peripheral surface thereof. A holding body that holds one of the bonding optical elements so that an outer peripheral surface of each subsequent optical element is exposed, and is interposed between the bonding surfaces of the optical elements to be bonded. Addition reaction curable organic adhesive And protruding from between the joint surfaces of the optical elements. Addition reaction curable organic adhesive And a low-polarity energy curable adhesive that is coated and cured by covering the protruding portion.
[0022]
In the inventions according to claims 4 to 6 described above, the holding optical body can hold the cemented optical element in a state in which optical axis misalignment hardly occurs and centering with high decentering accuracy is possible. Further, the bonded optical element can be held in a state where the ultraviolet transmittance is good.
[0023]
The invention according to claim 7 is a method for manufacturing a bonded optical element in which two or more optical elements are bonded to each other. Addition reaction curable organic adhesive And a step of dropping the liquid Addition reaction curable organic adhesive Is spread over the entire bonding surface by pressing with the bonding surface of the second optical element, Addition reaction curable organic adhesive Protruding part from the bonding surface, forming a protruding portion, performing a centering operation of the first and second optical elements to perform a desired centering, and protruding from the bonding surface Overhang between the joint surfaces of each optical element Addition reaction curable organic adhesive And a step of curing earlier.
[0024]
The invention of claim 8 is a method for manufacturing a bonded optical element in which two or more optical elements are bonded.
On the bonding surface of the first optical element, Addition reaction curable organic adhesive A step of droplets;
Droplet Addition reaction curable organic adhesive Is spread over the entire bonding surface by pressing with the bonding surface of the second optical element, Addition reaction curable organic adhesive Forming a protruding portion by protruding a part of the surface from the bonding surface;
Performing a centering operation of the first and second optical elements to perform a desired centering;
Covers the protruding portion that protrudes from the bonding surface, and contacts the outer peripheral surface of each optical element that follows each bonding surface, and between the bonding surfaces. Addition reaction curable organic adhesive To seal Made of low polarity energy curable adhesive And a step of forming an adhesive layer.
[0025]
According to the seventh and eighth aspects of the present invention, it is possible to manufacture in a short time a bonded optical element that has good transmittance in the ultraviolet region and is centered with good decentering accuracy.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be specifically described with reference to embodiments shown in the drawings. In each embodiment, the same elements are associated with the same reference numerals.
[0027]
(Embodiment 1)
FIG. 1 shows a first embodiment of the present invention. A cemented optical element includes a quartz lens 1 having a high ultraviolet transmittance and a silicon oxide content of 30 wt% or more, and a fluorite having a silicon oxide content of less than 30 wt%. And a lens 2. In this bonded optical element, a substantially lower half of the outer peripheral surface of the quartz lens 1 is fixed to a metal holding frame 5 with a silicone-based ultraviolet curable adhesive 4. The holding device is configured by being held by the metal holding frame 5.
[0028]
On the quartz lens 1 fixed to the holding frame 5, the cohesive energy density (CED) is 50 cal / cm. ³ The fluorite lens 2 is bonded with an adhesive 3 made of an addition reaction type organic silicone resin as a low-polarity material having the following (solubility parameter SP value of 7 or less). Each of the lens outer peripheral surfaces 6a and 6b following the cemented surface of the quartz lens 1 and the fluorite lens 2 is formed with a platinum catalyst 7 layer having a ring shape of approximately 2 mm width. Further, the protruding adhesive 3a protrudes from the joint surface of the quartz lens 1 and the fluorite lens 2 to each outer peripheral surface 6a, 6b, and the protruding adhesive bonded to the platinum catalyst 7 formed on each outer peripheral surface 6a, 6b. By the agent 3a, the quartz lens 1 and the fluorite lens 2 are fixed also in the vicinity of the lens outer peripheral surfaces 6a and 6b following the respective cemented surfaces.
[0029]
In this embodiment, the platinum catalyst 7 applied to the lens outer peripheral surfaces 6a and 6b is a product. Name “KE-93-405” (manufactured by Shin-Etsu Chemical Co., Ltd.) was used. As an addition reaction type organic silicone adhesive, a product that is a two-component mixed type Name “KE109E” (manufactured by Shin-Etsu Chemical Co., Ltd.) was used. This addition reaction type organosilicone resin is prepared by measuring A solution (main agent) and B solution (curing catalyst) of an organosilicone resin at a mixing ratio of 1: 1 and mixing them uniformly with a stir bar. The product was left to stand at room temperature for natural degassing and then defoamed under reduced pressure with a decompressor.
[0030]
In order to manufacture the holding device for the bonded optical element according to this embodiment, the holding frame 5 is formed by forming the stepped portion 5a facing inward on the inner surface of the cylindrical portion 5b through which the central portion passes. The stepped portion 5a is used for mounting the quartz lens 1. The axial length on the upper side of the cylindrical portion 5b with the stepped portion 5a as a boundary is substantially half the length of the outer peripheral surface of the quartz lens 1. ing.
[0031]
A concave spherical quartz glass 1 is dropped into the holding frame 5, and a silicone ultraviolet curing adhesive 4 having a viscosity of 2000 m · Pa flows into a clearance formed by the inner periphery of the holding frame 5 and the outer periphery of the quartz lens 1. The supply of the adhesive 4 to the clearance may be performed by a procedure in which the adhesive 4 is previously applied to the substantially lower half of the outer periphery of the quartz glass 1 and then the quartz glass 1 is dropped into the holding frame 5.
[0032]
Next, the quartz lens 1 is centered with respect to the holding frame 5 by a centering device (not shown), and the eccentricity accuracy is set within 1 '. After this centering, the adhesive 4 is irradiated with ultraviolet rays and cured. Curing at this time is temporary curing that does not cause misalignment, and is 30 mw / cm by a light guide for ultraviolet light guide. ² Irradiation is performed for 20 seconds at an ultraviolet intensity of. Thereafter, it is left to stand at room temperature for 24 hours to be fully cured.
[0033]
Next, a platinum catalyst 7 is applied to a width of approximately 2 mm on the lens outer peripheral surface 6 a following the cemented surface of the quartz lens 1 on the holding frame 5. The platinum catalyst 7 is also applied to the approximately 2 mm width of the lens outer peripheral surface 6 b that follows the cemented surface of the fluorite lens 2 that is cemented onto the quartz lens 1. After this application, the adhesive 3 made of addition reaction organosilicone resin is dropped near the center of the joint surface of the quartz lens 1, and then the fluorite lens 2 is put on top of this to attach the adhesive 3 to the upper surface of the fluorite lens 2. While being spread over the entire cemented surface by pressure from the side, a part thereof is projected from the cemented surface to the outer peripheral surfaces 6a and 6b of the respective lenses.
[0034]
The protruding adhesive 3a formed by this protrusion reacts with the platinum catalyst 7 applied to the outer peripheral surfaces 6a and 6b of the lenses 1 and 2, and the curing rate of the protruding adhesive increases, and it becomes a gel state in a few minutes. Thus, the relative positions of the two lenses 1 and 2 do not shift. Therefore, immediately after the protruding adhesive 3a is formed, the fluorite lens 2 is centered by, for example, a bell centering device, and the fluorite lens 2 is centered so that the eccentricity accuracy is within 1 '. Then, the fluorite lens 2 is centered and adjusted so that the eccentricity accuracy is within 1 ′, and cured at room temperature while being attached to the centering device. In this way, a bonded optical element holding device is manufactured.
[0035]
The addition reaction type organic silicone adhesive after curing was a rubber-like cured product and was JIS A30-40. The layer thickness of the adhesive contributing to the bonding was 10 μm. Since this thickness was set in the range of 5 to 15 μm, it is within a desirable range.
[0036]
The amount of the platinum catalyst 7 applied to each lens outer peripheral surface 6a, 6b is preferably about twice as much as the amount of the protrusion adhesive 3a, and is applied in advance to the lens outer peripheral surfaces 6a, 6b following each lens joint surface. When the applied amount is small, the adhesive 3 is spread over the entire joining surface of the lenses 1 and 2 and the adhesive is protruded from the outer peripheral surfaces 6a and 6b of the lenses, and then, as shown in FIG. The platinum catalyst 7a may additionally be applied again on the protrusion of the agent 3a (that is, from above the protrusion adhesive 3a).
[0037]
In this case, when the coating amount of the platinum catalyst 7 is 1.5 times or less of the protruding amount of the protruding adhesive 3a, the curing acceleration is slightly delayed. On the other hand, when it exceeds 2.5 times, the platinum catalyst does not react with the addition reaction type organosilicone adhesive and remains in a liquid state and the amount remaining on the outer peripheral surface of each lens increases, which may impair the appearance. Therefore, after the addition reaction type organosilicone adhesive is cured at room temperature, it is necessary to wipe off the platinum catalyst.
[0038]
The order of dropping the lens into the holding frame 5 and joining may be a case where the fluorite lens 2 is fixed to the holding frame 5 and the quartz lens 1 is joined onto the fluorite lens 2.
[0039]
Thus, the adhesive 3 that has been dropped onto the quartz lens 1 is pressurized by bonding the lens 2, and the adhesive that contributes to the bonding spreads evenly over the entire surface of the joint, and the outer periphery that continues to the lens joint surface. Part of the surfaces 6a and 6b protrudes as an adhesive 3a, and this adhesive 3a contacts and reacts with the platinum catalyst 7 previously applied to the lens outer peripheral portions 6a and 6b, so that the adhesive 3a is cured. Therefore, the cemented lens (junction optical element) can be positioned and fixed quickly, and therefore, the optical axis shift hardly occurs.
[0040]
In this embodiment, the platinum catalyst 7 is applied to the lens outer peripheral surfaces 6a and 6b of the lenses 1 and 2 to be bonded, so that the platinum catalyst 7 reacts only with the protruding adhesive 3a protruding from the lens outer peripheral surface. For this reason, the platinum catalyst 7 does not react with the adhesive 3 (that is, the adhesive contributing to the joining) interposed in each effective diameter of the cemented lens. Thus, even when the cemented lens or the cemented lens incorporated in the cemented optical element holding device is incorporated in an ultraviolet microscope and used, it does not change color due to ultraviolet rays and impair the transmittance.
[0041]
Further, when the lenses are bonded, the protruding adhesive that protrudes hardens at an early stage, so that the optical axis shift hardly occurs and high eccentricity accuracy can be secured. For this reason, workability | operativity becomes favorable and can shorten work time. Furthermore, since the adhesive 3 contributing to the bonding and the protruding adhesive 3a for ensuring the eccentricity accuracy are the same silicone adhesive, the occurrence of optical distortion in the cemented lens can be suppressed.
[0042]
(Embodiment 2)
FIG. 3 shows a second embodiment of the present invention. In this embodiment, a first quartz lens 1 having a high ultraviolet transmittance and a silicon oxide content of 30 wt% or more, a fluorite lens 2 having a silicon oxide content of less than 30 wt%, and a first quartz lens. A cemented optical element (a cemented lens) is formed from the second quartz lens 10 having the same content as 1. In addition, approximately three-quarters of the outer peripheral surface of the first quartz lens 1 is fixed to a metal holding frame 5 with a silicone-based ultraviolet curable adhesive 4.
[0043]
The cohesive energy density (CED) is 50 cal / cm between the cemented surfaces of the first quartz lens 1, the fluorite lens 2 and the second quartz lens 10. ³ The addition reaction type organosilicone resin as a low-polarity adhesive having the following (solubility parameter SP value of 7 or less) is bonded as an adhesive 3 that contributes to bonding. Further, the protruding adhesive 3a that protrudes from the outer peripheral surfaces 6a, 6b, and 6c that extend from between the bonding surfaces of the first quartz lens 1, the fluorite lens 2, and the second quartz lens 10 to the bonding surfaces of the lenses. 3b is provided.
[0044]
This protruding adhesive 3a, 3b On the outside, the platinum catalyst 7 is applied so as to cover the protruding adhesives 3a and 3b and to have contact portions on the outer peripheral surfaces 6a, 6b and 6c. The entire platinum catalyst 7 is covered (sealed), and the outer peripheral surfaces 6a, 6b and 6c are also coated with an adhesive 8 so as to have an adhesive surface. As the adhesive 8, a condensation type silicone adhesive having a low polarity imparting ultraviolet curability is used.
[0045]
In this embodiment, as the adhesive 3 composed of an addition reaction type organic silicone resin that joins the lenses 1, 2, and 10, a two-component mixed type trade name “KE109E” (manufactured by Shin-Etsu Chemical Co., Ltd.) is used. Using. In addition, as a platinum catalyst, a trade name “KE-93-405” (manufactured by Shin-Etsu Chemical Co., Ltd.) was used. Further, as the condensation type silicone adhesive 8, a trade name “KE4835” (manufactured by Shin-Etsu Chemical Co., Ltd.) was used.
[0046]
In order to manufacture the holding device for the bonded optical element according to this embodiment, the holding frame 5 is formed by forming the stepped portion 5a facing inward on the inner surface of the cylindrical portion 5b through which the central portion passes. In this case, the axial length of the cylindrical portion 5 b is slightly shorter than the length of the outer peripheral surface of the quartz lens 1.
[0047]
The biconvex first quartz lens 1 is dropped into the holding frame 5, and the clearance (gap) formed by the inner peripheral surface of the holding frame 5 and the outer peripheral surface of the first quartz lens 1 is 2000 m · A silicone-based ultraviolet curable adhesive 4 having a Pa viscosity flows in. Subsequently, the centering device (not shown) performs the centering operation of the first quartz lens 1 with respect to the holding frame 5 so that the eccentricity accuracy is within 1 '. After this centering, ultraviolet rays are applied to the ultraviolet curable adhesive 4. Irradiate to cure. At the time of this curing, an initial light intensity of 30 mw / cm with a light guide for ultraviolet light guide is used for temporary curing without causing misalignment. ² For 20 seconds, then 3000 mj / cm ² Was cured by irradiating the amount of light. This time and light intensity are set appropriately. The assembly was then released from the centering device.
[0048]
Next, on the first quartz lens 1, the adhesive 3 made of addition reaction type organic silicone resin is selected to have a viscosity between 2000 mPa · s and 10000 mPa · s and then dropped, and then the fluorite lens 2 is attached. While bonding, the adhesive 3 is spread over the entire cemented surface by pressing from the upper surface side of the fluorite lens 2, and part of the adhesive 3 protrudes from the cemented surface to the outer peripheral surfaces 6 a and 6 b of the lenses 1 and 2. By this protrusion, a convex protrusion adhesive 3a is formed.
[0049]
Thereafter, the centering operation of the first quartz lens 1 and the fluorite lens 2 is performed again by a centering device, for example, a bell centering device, the eccentricity accuracy is within 1 ', and the protrusion is left attached to the centering device. The platinum catalyst 7 is applied so as to cover the adhesive 3a. By applying the platinum catalyst 7, the curing speed of the protruding adhesive 3 a is accelerated, and the protruding adhesive 3 a becomes a gel state in a few minutes and is fixed so that the two lenses 1 and 2 are not misaligned.
[0050]
Next, the condensation type silicone adhesive 8 is applied so as to form an adhesive surface on the surface of the platinum catalyst 7 applied to the protruding adhesive 3a and on the outer peripheral surfaces 6a and 6b of the lenses 1 and 2 as well. In order to prevent internal stress distortion due to rapid curing, the condensation type silicone adhesive 8 is irradiated with an ultraviolet light guide with a light intensity of 30 nm / cm. ² Is irradiated with UV light for 20 seconds to perform temporary curing, and then 3000 mj / cm by an ultraviolet curing device. ² The film was fully cured with a light amount of. Then, the centering device is once released from the first quartz lens 1 and the fluorite lens 2. In this case, the condensation type silicone adhesive 8 and the adhesive 4 used in advance for the holding frame 5 were continuous.
[0051]
Thereafter, the adhesive 3 made of the same addition reaction type organic silicone resin as described above is dropped on the upper surface of the fluorite lens 2, and the second quartz lens 10 is bonded to the second quartz lens 10 while adhering the second quartz lens 10 thereon. By applying pressure from the upper surface side, the adhesive 3 is spread over the entire bonding surface, and a part of the bonding agent 3 protrudes from the bonding surface to the outer peripheral surfaces 6 b and 6 c of the lenses 2 and 10. The protrusion adhesive 3b is formed by this protrusion.
[0052]
After the protruding adhesive 3b is formed, the centering operation of the cemented lens including the fluorite lens 2 and the second quartz lens 10 is performed by, for example, a bell centering device, and the eccentricity accuracy is within 1 '. And the platinum catalyst 7 is apply | coated so that the protrusion adhesive agent 3b may be coat | covered with attaching to the centering apparatus in the state within the eccentricity accuracy 1 '. By applying the platinum catalyst 7, the curing speed of the protruding adhesive 3 b is accelerated, and the protruding adhesive 3 b becomes a gel state in a few minutes, and the second quartz lens 10 is joined without positional displacement.
[0053]
Next, the condensation type silicone adhesive 8 is applied so that an adhesive surface is also formed on the surface of the platinum catalyst 7 applied to the protruding adhesive 3 b and the outer peripheral surfaces 6 b and 6 c of the lenses 2 and 10. The adhesive 8 was temporarily cured, followed by main curing, and then the centering device was released.
[0054]
Thereafter, an adhesive made of an addition-reactive organic silicone resin in the holding frame 5 holding the cemented lens to which the first quartz lens 1, the fluorite lens 2 and the second quartz lens 10 are cemented, that is, the cemented surface of each lens. The adhesive 3 that contributes to the bonding between the two was cured at room temperature to obtain the bonding optical element holding device of the present embodiment.
[0055]
(Embodiment 3)
FIG. 4 shows a fourth embodiment. In the holding device in this embodiment, the surface of the adhesive adhesive 3a made of an addition-reactive organic silicone resin between the cemented lenses protruding from the lens outer peripheral surfaces 6a and 6b following the lens cemented surface is adhered by the adhesive 9. It is to be coated. As the adhesive 9, as in the adhesive 3 made of an organic silicone resin, a polyolefin-based ultraviolet curable adhesive that is a low-polarity adhesive was used. As the ultraviolet curable adhesive 9, a trade name “XVL-09” (manufactured by Kyoritsu Chemical Industry Co., Ltd.) having a viscosity of 4000 m · Pa was used. Further, as the adhesive 3 made of addition reaction type organic silicone resin, the same two-component mixed type trade name “KE109E” (manufactured by Shin-Etsu Chemical Co., Ltd.) as described above was used.
[0056]
In the manufacture of the holding device of this embodiment, the quartz lens 1 is fixed to the holding frame 5 in the same manner as in the first embodiment. Then, the adhesive 3 made of addition reaction type silicone resin is dropped on the joint surface of the quartz lens 1 fixed to the holding frame 5, and the fluorite lens 2 is bonded to spread the adhesive 3 over the entire joint surface. An adhesive protrudes from the outer peripheral surfaces 6a and 6b of each lens and protrudes as an adhesive 3a. Thereafter, the fluorite lens 2 is centered using a centering device, and the eccentricity accuracy is within 1 '.
[0057]
Then, it is sealed with a low-polarity polyolefin-based UV adhesive 9 so as to cover the protruding adhesive 3 that protrudes from each lens bonding surface and also covers the outer peripheral surface of each lens while being centered by the centering device. To do. In order to prevent stress distortion due to the rapid curing of the adhesive 9 from the ultraviolet light guide, 30 mw / cm from the ultraviolet light guide. ² After performing temporary curing by irradiation for 60 seconds or more with an ultraviolet intensity of 3000 mj / cm with an ultraviolet curing device. ² Was cured by giving a light amount of. Thereafter, the holding frame 5 holding the cemented lens was removed from the centering device, and the addition reaction type silicone adhesive 3 was cured at room temperature to obtain the cemented optical element holding device of the present embodiment.
[0058]
In this embodiment, the coating amount of the ultraviolet curable adhesive 9 is at least twice that of the protruding adhesive 3 protruding from the lens bonding surface. This is because, when the application amount of the ultraviolet curable adhesive 9 is small, it becomes easy to mix with the protruding adhesive 3, and it becomes difficult to react to the ultraviolet rays, the curing time by the ultraviolet rays becomes long, and the adhesive strength is lowered.
[0059]
In this embodiment, the centering operation of the fluorite lens 2 is set to within the eccentricity accuracy 1 'and the joining operation is continued while being centered by the centering device. A protruding adhesive 3a is formed with the centering operation performed in the vicinity of the eccentricity accuracy 1 ', and the protruding adhesive 3a and the outer peripheral surfaces of the lenses (the outer peripheral surfaces following the bonding surfaces of the lenses) 6a and 6b are made of a low-polar polyolefin type. When it is cured after being coated with the ultraviolet adhesive 9, the eccentricity may be centered within 1 ′.
[0060]
In this embodiment, the low-polarity ultraviolet curable adhesive 9 covers the protruding adhesive 3a made of a low-polarity silicone resin that protrudes to the outer peripheral side of the lens bonding surface, and the outer peripheral surfaces 6a and 6b of the respective lenses. It functions as a sealing agent in contact with both. This low-polarity ultraviolet curable adhesive 9 is quickly cured by ultraviolet rays, and is bonded to the low-polarity silicone adhesive 3, and at the same time adheres to the outer peripheral surfaces 6 a and 6 b following the joint surfaces of the lenses 1 and 2. Is done. For this reason, the adhesive that is interposed between the joint surfaces of the lenses 1 and 2 and contributes to the joining, the adhesive 3a that protrudes from the outer peripheral side of the lenses 1 and 2, and the adhesive 1a that is applied onto the protruding adhesive 3a and applied to the lens 1 The bonding is reinforced by the ultraviolet curable adhesive 9 that also contacts the outer peripheral surface of the two.
[0061]
In addition, since the UV curable adhesive 9 that functions as a sealing agent is a low-polarity adhesive similar to an adhesive made of a low-polarity addition reaction type organic silicone resin, it can be bonded to the protruding adhesive 3a. Thus, high eccentricity accuracy can be secured by early curing.
[0062]
As the adhesive, instead of the addition reaction type silicone adhesive 3, a transparent low-polarity material such as a silicone pressure-sensitive adhesive, silicone grease, or silicone oil may be used. Since such a low-polarity material does not become hard between the cemented surfaces of the lenses, after being interposed between the cemented surfaces of the lenses, a centering device is used to perform a centering operation up to the vicinity of the eccentricity accuracy 1 ′. Applying low-polarity polyolefin-based UV adhesive 9 to form the protruding part (extruding material part), centering with the centering device, and extending to the surface of the protruding part and the outer peripheral surface of each lens. After that, the centering operation with an eccentricity accuracy within 1 'is performed, and temporary curing and main curing are performed while continuing the centering by the centering device, and the adhesive 9 covering the protruding portion is cured. A cemented lens may be formed.
[0063]
In each of the above embodiments, the two-component mixed type trade name “KE109E” (manufactured by Shin-Etsu Chemical Co., Ltd.) is used as the adhesive made of the addition reaction type organosilicone resin. Sylpot 184 "(manufactured by Dow Corning) may be used. In the case of Sylpot 184, 1 part of a platinum-based curing catalyst (Silpot 184w / c) is weighed out with respect to 10 parts of the main agent of Sylpot 184, and these are uniformly mixed with a stir bar, then left at room temperature for 10 minutes You may use what deaerated naturally, and also deaerated under reduced pressure with the vacuum degassing machine.
[0064]
In each embodiment, quartz lenses having a silicon oxide content of 30 wt% or more and fluorite lenses having a silicon oxide content of less than 30 wt% are joined. It can also be applied to the joining. The silicon oxide content of less than 30 wt% includes FPL51, FPL52, FPL53 (all content 0 wt%), LAL61 (3 wt%), LAL18 (5 wt%), LAM2 (10-20 wt%), LAH66 (5-5 10 wt%) (both trade names manufactured by OHARA), and those having a silicon oxide content of 30 wt% or more include BSL7 (70 wt%), BAL11 (48 wt%), NSL2 (67 wt%), BAM1 (56 wt%), PBL1 (59 wt%), BAL4 (49 wt%), quartz (100%), or the like can be used.
[0065]
From the above description, the present invention includes the following inventions.
[0066]
(Appendix)
(1) In an optical element holding device that holds a bonded optical element obtained by bonding two or more optical elements to a holding body at least on its side surface, an adhesive interposed between the bonded optical elements is a low-polarity material, and is bonded An optical element holding device, wherein the adhesive covering the outer peripheral surface of the bonded optical element is an adhesive having a low polarity or an energy curable adhesive.
[0067]
(2) The optical element holding device according to (1) above, wherein the adhesive covering the outer peripheral surfaces of two or more optical elements is a low-polarity ultraviolet curable adhesive such as silicone or polyolefin.
[0068]
(3) The optical element holding device according to (1), wherein a platinum catalyst layer is formed on the outer peripheral surface of the bonded optical element.
[0069]
(4) The optical element holding device according to (1), wherein the bonding agent interposed between the optical element bonding surfaces is an organic silicone material such as silicone adhesive, silicone grease, silicone oil.
[0070]
【The invention's effect】
As described above, according to the cemented optical element of the first to third aspects of the present invention, the cemented optical element having good ultraviolet transmittance, hardly causing optical axis deviation, and capable of centering with high decentering accuracy. can do.
[0071]
According to the fourth to sixth aspects of the present invention, it is possible to hold a bonded optical element that is less likely to cause optical axis misalignment, can be centered with high decentering accuracy, and has good ultraviolet transmittance.
[0072]
According to the seventh and eighth aspects of the present invention, it is possible to manufacture in a short time a bonded optical element that has good transmittance in the ultraviolet region and is centered with good decentering accuracy.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a holding device for a bonded optical element according to Embodiment 1 of the present invention.
FIG. 2 is a cross-sectional view showing another embodiment of the first embodiment.
FIG. 3 is a cross-sectional view showing a holding device for a bonded optical element according to a second embodiment of the present invention.
FIG. 4 is a cross-sectional view showing a holding device for a bonded optical element according to Embodiment 3 of the present invention.
FIG. 5 is a cross-sectional view showing a conventional optical element holding device.
[Explanation of symbols]
1 Quartz lens
2 Fluorite lens
3 Adhesive
3a Overhang adhesive
7 Platinum catalyst

Claims

In a bonded optical element in which two or more optical elements are bonded,
An adhesive comprising an addition reaction curable organic silicone resin interposed between the bonding surfaces of the optical elements to be bonded;
In the vicinity of the bonding surface of each optical element to be bonded, and having a platinum catalyst formed on the outer peripheral surface of the optical element,
Bonding optics characterized in that the protruding adhesive that protrudes from between the bonding surfaces of each optical element reacts with the platinum catalyst to cure the protruding adhesive faster than the adhesive on the bonding surface of the optical element. element.

In a bonded optical element in which two or more optical elements are bonded,
An adhesive comprising an addition reaction curable organic silicone resin interposed between the bonding surfaces of the optical elements to be bonded;
A platinum catalyst that coats the protruding adhesive that protrudes from between the bonding surfaces of each optical element, and that reacts with the protruding adhesive;
A bonded optical element comprising: a low-polarity energy curable adhesive that covers the reacted platinum catalyst and contacts an outer peripheral surface of each optical element following the bonded surface to be bonded.

In a bonded optical element in which two or more optical elements are bonded,
An addition reaction curable organic adhesive interposed between the bonding surfaces of the optical elements to be bonded;
A bonded optical element comprising: a low-polarity energy curable adhesive which is cured by covering an extended portion made of an addition reaction curable organic adhesive protruding from between the bonding surfaces of the optical elements.

In a bonded optical element holding device that holds a bonded optical element in which two or more optical elements are bonded to a holding body at least on the outer peripheral surface thereof,
A holding body that holds one of the bonding optical elements such that the bonding surface of the bonding optical element and the outer peripheral surface of each optical element following the bonding surface are exposed;
An adhesive comprising an addition reaction type organic silicone resin interposed between the bonding surfaces of the optical elements to be bonded;
In the vicinity of the bonding surface of each optical element to be bonded, and having a platinum catalyst formed on the outer peripheral surface of the optical element,
Bonding optics characterized in that the protruding adhesive that protrudes from between the bonding surfaces of each optical element reacts with the platinum catalyst to cure the protruding adhesive faster than the adhesive on the bonding surface of the optical element. Device holding device.

In a bonded optical element holding device that holds a bonded optical element in which two or more optical elements are bonded to a holding body at least on the outer peripheral surface thereof,
A holding body for holding one of the bonding optical elements such that a bonding surface of the bonding optical element and an outer peripheral surface of each optical element following the bonding surface are exposed;
An adhesive comprising an addition reaction curable organic silicone resin interposed between the bonding surfaces of the optical elements to be bonded;
A platinum catalyst that coats the protruding adhesive that protrudes from between the bonding surfaces of each optical element, and that reacts with the protruding adhesive;
An apparatus for holding a bonded optical element, comprising: a low-polarity energy curable adhesive that covers the reacted platinum catalyst and contacts an outer peripheral surface of each optical element following the bonded surface to be bonded.

In a bonded optical element holding device that holds a bonded optical element in which two or more optical elements are bonded to a holding body at least on the outer peripheral surface thereof,
A holding body for holding one of the bonding optical elements such that a bonding surface of the bonding optical element and an outer peripheral surface of each optical element following the bonding surface are exposed;
An addition reaction curable organic adhesive interposed between the bonding surfaces of the optical elements to be bonded;
A low-polarity energy curable adhesive that covers and cures a protruding portion made of an addition reaction curable organic adhesive protruding from between the bonding surfaces of the optical elements. apparatus.

In the method for manufacturing a bonded optical element in which two or more optical elements are bonded,
Dropping the addition reaction curable organic adhesive onto the bonding surface of the first optical element;
The dropped addition reaction curable organic adhesive is spread over the entire bonding surface by pressurization by the bonding surface of the second optical element, and a portion of the addition reaction curable organic adhesive protrudes from the bonding surface to Forming, and
Performing a centering operation of the first and second optical elements to perform a desired centering;
A step of curing the protruding portion protruding from the bonding surface prior to the addition reaction curable organic adhesive between the bonding surfaces of each optical element;
A method for producing a cemented optical element, comprising:

In the method for manufacturing a bonded optical element in which two or more optical elements are bonded,
Dropping the addition reaction curable organic adhesive onto the bonding surface of the first optical element;
The dropped addition reaction curable organic adhesive is spread over the entire bonding surface by pressurization by the bonding surface of the second optical element, and a portion of the addition reaction curable organic adhesive protrudes from the bonding surface to Forming, and
Performing a centering operation of the first and second optical elements to perform a desired centering;
A low-polarity energy curable adhesive that covers the protruding portion protruding from the bonding surface and seals the addition reaction curable organic adhesive between the bonding surfaces in contact with the outer peripheral surface of each optical element following the bonding surfaces. forming an adhesive layer made of adhesive,
A method for producing a cemented optical element, comprising: