JPH0797198B2 - Lens array - Google Patents
Lens arrayInfo
- Publication number
- JPH0797198B2 JPH0797198B2 JP1188277A JP18827789A JPH0797198B2 JP H0797198 B2 JPH0797198 B2 JP H0797198B2 JP 1188277 A JP1188277 A JP 1188277A JP 18827789 A JP18827789 A JP 18827789A JP H0797198 B2 JPH0797198 B2 JP H0797198B2
- Authority
- JP
- Japan
- Prior art keywords
- lens
- lens array
- lens element
- supports
- lugs
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000463 material Substances 0.000 claims description 10
- 230000003287 optical effect Effects 0.000 description 13
- 238000000465 moulding Methods 0.000 description 6
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 229910001374 Invar Inorganic materials 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229910003271 Ni-Fe Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Landscapes
- Optical Systems Of Projection Type Copiers (AREA)
Description
【発明の詳細な説明】 [産業上の利用分野] 本発明は、ゼログラフィ複写機、LEDプリンター、液晶
プリンター、ファクシミリ等の機器に用いるレンズアレ
イ、特に、倒立変倍像を投影するレンズアレイに関する
ものである。TECHNICAL FIELD The present invention relates to a lens array used in equipment such as a xerographic copying machine, an LED printer, a liquid crystal printer, and a facsimile, and more particularly to a lens array for projecting an inverted variable magnification image. It is a thing.
[従来の技術] 倒立変倍像を投影するレンズアレイは、正立等倍像を投
影するレンズアレイと異なり、像がずれて投影されるの
を避けるため、各レンズ素子のピッチが温度変化に対し
ても所定ピッチに保たれ、且つ、各レンズ素子の光軸が
狂わないことを肝要とする。当業者によく知られている
ように、各レンズ素子のピッチ及び光軸は、相当に高い
精度で維持されないと、ずれのない像が得られない。[Prior Art] A lens array for projecting an inverted variable-magnification image is different from a lens array for projecting an erecting equal-magnification image in order to prevent the image from being shifted and projected. It is important that the predetermined pitch is maintained and the optical axis of each lens element is not deviated. As is well known to those skilled in the art, the pitch and optical axis of each lens element must be maintained with a fairly high degree of accuracy to obtain a deviated image.
[発明が解決しようとする課題] 従来、温度変化にも各レンズ素子のピッチ及び光軸が狂
わずに所定に維持される倒立変倍像投影レンズアレイ
は、未だ開発されていない。因みに、従来、前述した機
器に使用されているレンズアレイは、正立等倍像を投影
するものが知られているにとどまる。[Problems to be Solved by the Invention] Conventionally, an inverted variable magnification image projection lens array in which the pitch and the optical axis of each lens element are not deviated even when the temperature changes and is maintained at a predetermined level has not been developed yet. Incidentally, conventionally, the lens array used in the above-mentioned device is only known to project an erecting equal-magnification image.
従来のレンズアレイは、各レンズ素子を支持する支持体
を、熱硬化性プラスチック材料で成形し、この成形によ
り各レンズ素子を結合している。(例えば、特開昭56−
74207号公報等参照) かかる従来のレンズアレイの結合構造は、各レンズ素子
のピッチ及び光軸を温度変化にも狂わないよう所定に維
持することはできず、倒立変倍像投影用レンズアレイの
結合には適用不可である。In a conventional lens array, a support body that supports each lens element is molded with a thermosetting plastic material, and each lens element is bonded by this molding. (For example, JP-A-56-
(See Japanese Laid-Open Patent Publication No. 74207, etc.) In such a conventional lens array coupling structure, it is impossible to maintain the pitch and optical axis of each lens element in a predetermined manner so as not to be affected by temperature changes. Not applicable to joins.
本発明の課題は、各レンズ素子のピッチ及び光軸を温度
変化に対して狂わないよう維持できる倒立変倍像用のレ
ンズアレイを、射出成形法を利用して製造可能とする点
にある。An object of the present invention is to make it possible to manufacture a lens array for an inverted variable-magnification image, which can maintain the pitch and optical axis of each lens element not to be affected by temperature changes by using an injection molding method.
[課題を解決するための手段] 上記課題を解決するため、本発明は、低熱膨張率の材料
からなり、所定の間隔をおいて平行に配置された2本の
棒状の支持体(2)(2)と、上記平行する支持体
(2)(2)間に所定の間隔をおいて別々に配置された
多数の単体をなすレンズ素子(1a)(1a)・・・とから
なり、上記支持体(2)(2)は、所定のピッチで形成
した上下方向に貫通するレンズ素子(1a)(1a)・・・
と同数のダボ穴(3)(3)・・・を有し、上記レンズ
素子(1a)(1a)・・・は、両側から支持体(2)
(2)の方向に、かつ、支持体(2)(2)の上下面に
張り出すラグ(4)(4)、(4)(4)を一体に有し
ており、上記上下のラグ(4)(4)とダボ穴(3)と
は、ダボ穴(3)内に充填したラグ(4)(4)と一体
のダボ(5)でジベル(凹字くさび)結合されているこ
とを特徴としている。[Means for Solving the Problems] In order to solve the above problems, the present invention relates to two rod-shaped supports (2) (2) (made of a material having a low coefficient of thermal expansion and arranged in parallel at predetermined intervals). 2) and a plurality of lens elements (1a) (1a) ... which are separately arranged at a predetermined interval between the parallel supports (2) and (2), The bodies (2) and (2) are lens elements (1a) (1a) ...
, Which have the same number of dowel holes (3), (3), and the lens elements (1a), (1a), ...
The lugs (4), (4), (4), and (4) that project in the direction of (2) and on the upper and lower surfaces of the support bodies (2) and (2) are integrally provided. 4) The (4) and the dowel hole (3) are connected by a dowel (concave wedge) with the dowel (5) integrated with the lug (4) (4) filled in the dowel hole (3). It has a feature.
[作用] 本発明は、多数のレンズ素子を同一平面上に配列して構
成されるレンズアレイにおいて、各レンズ素子のピッチ
及び光軸を温度変化に対して狂わないように維持できる
ようにするための構成を提案しているもので、そのため
の構成として、レンズアレイを構成する個々のレンズ素
子を従来では引用例1のように、一連一体に板状に射出
成形していたものを、2本の棒状の支持体と、この支持
体間に所定の間隔をおいて別々に配置された多数の単体
をなすレンズ素子とに分離して構成すると共に、上記支
持体には所定のピッチで上下方向に貫通するダボ穴を設
け、上記各レンズ素子には支持体の上下面に張り出すラ
グを一体に形成し、かつ、上下のラグを支持体のダボ穴
を貫通させて充填したダボで一体に連結させてジベル結
合し、上記支持体を低熱膨張率の材料で構成したもの
で、これにより、個々のレンズ素子は、支持体によって
のみ連繋しており、この支持体が低熱膨張率の材料で構
成してあることによって、低温度変化に対して、ピッチ
が狂うことが防止される。[Operation] According to the present invention, in a lens array configured by arranging a large number of lens elements on the same plane, the pitch and the optical axis of each lens element can be maintained so as not to be affected by temperature change. As a configuration for that, two individual lens elements constituting the lens array, which have been conventionally injection-molded into a plate shape as in Reference Example 1, as a configuration therefor are provided. Of the rod-shaped support and a plurality of single lens elements separately arranged at a predetermined interval between the supports, and the support is vertically arranged at a predetermined pitch. A dowel hole penetrating through the lens element is provided, and lugs projecting from the upper and lower surfaces of the support are integrally formed on each lens element, and upper and lower lugs are integrally formed by dowels that are inserted through the dowel holes of the support. Connect and give a Gibel join, then The support is made of a material having a low coefficient of thermal expansion, whereby the individual lens elements are connected only by the support, and the support is made of a material having a low coefficient of thermal expansion. The pitch is prevented from changing with respect to a low temperature change.
また、個々のレンズ素子と支持体とをジベル結合させて
あること及び支持体は2本を個々のレンズ素子の両側に
配置してあることによって、個々のレンズ素子と支持体
とが強固に一体化され、一連のレンズアレイとしての形
態を保持し、特に、個々のレンズ素子の光軸を高精度に
平行に保持させ、温度変化による光軸の狂いを防止させ
ることができる。In addition, since the individual lens elements and the supporting body are bonded together and two supporting bodies are arranged on both sides of the individual lens elements, the individual lens elements and the supporting body are firmly integrated. The optical axis of each lens element can be kept parallel to each other with high accuracy, and deviation of the optical axis due to temperature change can be prevented.
[実施例] 次に本発明の実施例を添付図面を参照して説明する。[Embodiment] Next, an embodiment of the present invention will be described with reference to the accompanying drawings.
図で(1)は倒立変倍像を投影するレンズアレイ、
(2)は該レンズアレイ(1)の各レンズ素子(1a)
(1a)・・・の並列方向に沿ってその両側に平行に配置
された支持体である。In the figure, (1) is a lens array for projecting an inverted zoom image,
(2) is each lens element (1a) of the lens array (1)
(1a) ... Supports arranged in parallel on both sides of the parallel direction.
レンズアレイ(1)を構成する各レンズ素子(1a)(1
a)・・・は、第1、2、4図に示すように、個々の単
体つまりそれ自体相互に縁が切れた形になしている。Each lens element (1a) (1) that composes the lens array (1)
a) ... As shown in FIGS. 1, 2, and 4, each individual unit, that is, itself is cut off from its edge.
支持体(2)(2)は、熱膨張率が7.0×10−6程度と
いうように低い適当な材料、例えば、42%Ni−Fe合金か
らなる、若しくは熱膨張率が0に近いインバーまたはア
ンバー、スーパーインバー材料からなる板或いは棒体を
素材とし、これに所定ピッチでダボ穴(3)(3)・・
・を穿ったものを有利に適用できる。Support (2) (2) is less suitable material such that the thermal expansion coefficient of about 7.0 × 10- 6, for example, made of 42% Ni-Fe alloy, or a thermal expansion coefficient close to zero Invar or amber , A plate or rod made of Super Invar material is used as a material, and dowel holes (3) (3) ..
・ It is possible to apply what has been worn.
上記ダボ穴(3)(3)・・付きの支持体(2)(2)
を2本、平行に所定間隔で並べて成形金型(図示省略)
にそれ自体公知の方法でインサートし、各レンズ素子
(1a)(1a)・・・の並列体をアクリル樹脂、ポリカー
ボネイト等のプラスチック材料からインサート成形す
る、即ち上記支持体(2)(2)を埋め込む射出成形法
で成形することにより、目的とする製品を得ることがで
きる。用いる成形金型は、レンズアレイ(1)及び各レ
ンズ素子(1a)(1a)・・・の後述するラグ(4)
(4)、(4)(4)の形状に対応する形をした成形キ
ャビティを有する。Supports (2) and (2) with dowel holes (3) (3) ...
Two molds are lined up in parallel at a predetermined interval (molding die not shown)
Is inserted by a method known per se into the above, and a parallel body of each lens element (1a) (1a) ... Is insert-molded from a plastic material such as acrylic resin or polycarbonate, that is, the support body (2) (2) is formed. The target product can be obtained by molding by the embedding injection molding method. The molding die used is the lens array (1) and the lugs (4) of each lens element (1a) (1a) ...
(4), (4) The molding cavity has a shape corresponding to the shape of (4).
こうして、各レンズ素子(1a)(1a)・・・のそれぞれ
は、別々の単体として、また、各レンズ素子(1a)(1
a)・・・よりこれと一体に上記平行な支持体(2)
(2)の側へ張り出すラグ(4)(4)、(4)(4)
付きのレンズアレイ(1)として成形されると共に、該
ラグ(4)(4)、(4)(4)において支持体(2)
(2)にジベル結合される。つまり当該成形時にダボ穴
(3)(3)・・・に埋入して、これと一体化されたダ
ボ(5)(5)・・・付きのものとして成形される。In this way, each lens element (1a) (1a) ...
a) ... more parallel to the above-mentioned parallel support (2)
Lugs (4), (4), (4), (4) that project to the side of (2)
And a support (2) at the lugs (4), (4), (4), (4)
It is Gibel coupled to (2). That is, it is embedded in the dowel holes (3) (3) ... At the time of the molding, and is molded as the one with the dowels (5) (5) ...
本発明のレンズアレイ(1)の各レンズ素子(1a)(1
a)・・・は、第5図に最も良く示しているように、別
々の単体をなしている。つまり、それ自体は相互に縁の
切れた形のものである。この構成は、温度変化によるレ
ンズアレイ(1)の膨張、収縮を各レンズ素子(1a)
(1a)・・・が吸収するのに寄与し、熱膨張率の低い材
料からなる平行する支持体(2)(2)に各レンズ素子
(1a)(1a)・・・が結合されていることと共に、各レ
ンズ素子(1a)(1a)・・・のピッチ及び光軸を温度変
化に対し十分に高い精度で狂わないように維持すること
を実現する。Each lens element (1a) (1) of the lens array (1) of the present invention
a) ..., as shown best in FIG. 5, are separate entities. In other words, they themselves are in the form of edges. In this configuration, the expansion and contraction of the lens array (1) due to temperature changes are controlled by each lens element (1a)
The lens elements (1a), (1a), ... Are coupled to the parallel supports (2), (2) that contribute to the absorption by (1a). At the same time, it is possible to maintain the pitch and the optical axis of each lens element (1a) (1a) ... With sufficiently high accuracy so as not to deviate with respect to temperature changes.
即ち、本発明に係るレンズアレイ(1)の各レンズ素子
(1a)(1a)・・・の前述した結合構造は、熱膨張率の
低い材料からなる所定方向へ延在して平行する支持体
(2)(2)によって、レンズアレイ(1)の各レンズ
素子(1a)(1a)・・・のピッチ及び光軸を所定に維持
することに寄与する。このため、各レンズ素子(1a)
(1a)・・・のピッチ及び光軸を温度変化で狂わないよ
う維持できるレンズアレイ(1)を、プラスチック材料
から射出成形法で得ることができる。That is, the above-described coupling structure of each lens element (1a) (1a) ... (2) (2) contributes to maintaining the pitch and the optical axis of each lens element (1a) (1a) ... Of the lens array (1) at a predetermined level. Therefore, each lens element (1a)
A lens array (1) capable of maintaining the pitch and the optical axis of (1a) so as not to be deviated by a temperature change can be obtained from a plastic material by an injection molding method.
各レンズ素子(1a)(1a)・・・から両側の支持体
(2)(2)に向けて一体に張り出す上下のラグ(4)
(4)、(4)(4)間を、支持体(2)(2)のダボ
穴(3)(3)・・・を貫通して充填されているダボ
(5)(5)・・・で断面I形(第3図参照)に一体的
に連結して構造的に強固なジベル結合を形成させたこと
により、この種のレンズアレイ(1)として、各レンズ
素子(1a)(1a)・・・の結合状態を強固なものとし、
光軸の狂いを防止することができという重要な機能を達
成し得る。Upper and lower lugs (4) projecting integrally from each lens element (1a) (1a) ... towards the supports (2) (2) on both sides
Dowels (5), (5), ... Filled by penetrating the dowel holes (3), (3) ... Of the supports (2), (2) between (4), (4), (4). The structurally strong Gibel coupling is formed by integrally connecting to the I-shaped cross section (see FIG. 3) at, and as a lens array (1) of this type, each lens element (1a) (1a) ) ... is strengthened,
It is possible to achieve the important function of being able to prevent the deviation of the optical axis.
[発明の効果] 以上説明したように、本発明によれば、各レンズ素子の
ピッチ及び光軸を温度変化に対して狂わないように維持
できる倒立変倍像投影用のレンズアレイを、射出成形法
を利用して安価に提供することができる。[Effects of the Invention] As described above, according to the present invention, a lens array for inverted variable magnification image projection, which can maintain the pitch and optical axis of each lens element so as not to deviate with respect to temperature changes, is injection molded. It can be provided cheaply by using the law.
第1図は本発明の一実施例を示す平面図、第2図はその
側面図、第3図は第2図III−III線断面図、第4図は底
面図、第5図は第1図のレンズアレイの一部を示す斜視
図である。 (1)……レンズアレイ、 (1a)……レンズ素子、(2)……支持体、 (3)……ダボ穴、(4)……ラグ、 (5)……ダボ。1 is a plan view showing an embodiment of the present invention, FIG. 2 is a side view thereof, FIG. 3 is a sectional view taken along line III-III of FIG. 2, FIG. 4 is a bottom view, and FIG. It is a perspective view which shows a part of lens array of a figure. (1) …… Lens array, (1a) …… Lens element, (2) …… Support, (3) …… Dowel hole, (4) …… Lag, (5) …… Dowel.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭56−74207(JP,A) 実開 昭62−164306(JP,U) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-56-74207 (JP, A) SAI-62-164306 (JP, U)
Claims (1)
おいて平行に配置された2本の棒状の支持体(2)
(2)と、 上記平行する支持体(2)(2)間に所定の間隔をおい
て別々に配置された多数の単体をなすレンズ素子(1a)
(1a)・・・とからなり、 上記支持体(2)(2)は、所定のピッチで形成した上
下方向に貫通するレンズ素子(1a)(1a)・・・と同数
のダボ穴(3)(3)・・・を有し、 上記レンズ素子(1a)(1a)・・・は、両側から支持体
(2)(2)の方向に、かつ、支持体(2)(2)の上
下面に張り出すラグ(4)(4)、(4)(4)を一体
に有しており、 上記上下のラグ(4)(4)とダボ穴(3)とは、ダボ
穴(3)内に充填したラグ(4)(4)と一体のダボ
(5)でジベル結合されていることを特徴とするレンズ
アレイ。1. Two rod-shaped supports (2) made of a material having a low coefficient of thermal expansion and arranged in parallel at a predetermined interval.
(2) and a plurality of lens elements (1a) which are separately arranged at a predetermined interval between the parallel supports (2) and (2).
(1a) ..., and the support bodies (2) and (2) are formed at a predetermined pitch and have the same number of dowel holes (3) as the lens elements (1a) (1a) ... ) (3) ..., and the lens elements (1a) (1a) ... are arranged in the direction of the supports (2) (2) from both sides and of the supports (2) (2). It integrally has lugs (4), (4), (4), (4) that project to the upper and lower surfaces, and the upper and lower lugs (4) (4) and the dowel hole (3) are the dowel holes (3). ) The lens array is characterized in that the lugs (4) and (4) filled in () are doweled together by dowels (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1188277A JPH0797198B2 (en) | 1989-07-19 | 1989-07-19 | Lens array |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1188277A JPH0797198B2 (en) | 1989-07-19 | 1989-07-19 | Lens array |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0351803A JPH0351803A (en) | 1991-03-06 |
| JPH0797198B2 true JPH0797198B2 (en) | 1995-10-18 |
Family
ID=16220842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1188277A Expired - Lifetime JPH0797198B2 (en) | 1989-07-19 | 1989-07-19 | Lens array |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0797198B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5674207A (en) * | 1979-11-22 | 1981-06-19 | Ricoh Co Ltd | Plate-form lens array |
| JPS62164306U (en) * | 1986-04-08 | 1987-10-19 |
-
1989
- 1989-07-19 JP JP1188277A patent/JPH0797198B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0351803A (en) | 1991-03-06 |
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