JP4834635B2 - 合成石英ガラス製プリフォーム - Google Patents
合成石英ガラス製プリフォーム Download PDFInfo
- Publication number
- JP4834635B2 JP4834635B2 JP2007250259A JP2007250259A JP4834635B2 JP 4834635 B2 JP4834635 B2 JP 4834635B2 JP 2007250259 A JP2007250259 A JP 2007250259A JP 2007250259 A JP2007250259 A JP 2007250259A JP 4834635 B2 JP4834635 B2 JP 4834635B2
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- Prior art keywords
- preform
- quartz glass
- laser
- sup
- content
- 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
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 230000005855 radiation Effects 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 230000007062 hydrolysis Effects 0.000 claims abstract description 4
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 4
- 238000002834 transmittance Methods 0.000 claims description 17
- 229910052739 hydrogen Inorganic materials 0.000 claims description 11
- 239000002994 raw material Substances 0.000 claims description 8
- 229910003902 SiCl 4 Inorganic materials 0.000 claims description 5
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- 229910052744 lithium Inorganic materials 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 229910052700 potassium Inorganic materials 0.000 claims description 4
- 229910052708 sodium Inorganic materials 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 3
- 229910052720 vanadium Inorganic materials 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 229910020598 Co Fe Inorganic materials 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 230000009467 reduction Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 23
- 230000003287 optical effect Effects 0.000 description 22
- 238000004519 manufacturing process Methods 0.000 description 19
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 11
- 239000000460 chlorine Substances 0.000 description 9
- 239000001257 hydrogen Substances 0.000 description 9
- 238000001499 laser induced fluorescence spectroscopy Methods 0.000 description 8
- 239000011521 glass Substances 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- 239000000567 combustion gas Substances 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000006552 photochemical reaction Methods 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000000206 photolithography Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000005350 fused silica glass Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000005298 paramagnetic effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C4/00—Compositions for glass with special properties
- C03C4/0085—Compositions for glass with special properties for UV-transmitting glass
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/14—Other methods of shaping glass by gas- or vapour- phase reaction processes
- C03B19/1407—Deposition reactors therefor
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/14—Other methods of shaping glass by gas- or vapour- phase reaction processes
- C03B19/1415—Reactant delivery systems
- C03B19/1423—Reactant deposition burners
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/06—Glass compositions containing silica with more than 90% silica by weight, e.g. quartz
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2201/00—Type of glass produced
- C03B2201/06—Doped silica-based glasses
- C03B2201/07—Impurity concentration specified
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2201/00—Type of glass produced
- C03B2201/06—Doped silica-based glasses
- C03B2201/20—Doped silica-based glasses doped with non-metals other than boron or fluorine
- C03B2201/21—Doped silica-based glasses doped with non-metals other than boron or fluorine doped with molecular hydrogen
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2201/00—Type of glass produced
- C03B2201/06—Doped silica-based glasses
- C03B2201/20—Doped silica-based glasses doped with non-metals other than boron or fluorine
- C03B2201/23—Doped silica-based glasses doped with non-metals other than boron or fluorine doped with hydroxyl groups
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2207/00—Glass deposition burners
- C03B2207/60—Relationship between burner and deposit, e.g. position
- C03B2207/62—Distance
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2201/00—Glass compositions
- C03C2201/06—Doped silica-based glasses
- C03C2201/20—Doped silica-based glasses containing non-metals other than boron or halide
- C03C2201/21—Doped silica-based glasses containing non-metals other than boron or halide containing molecular hydrogen
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2201/00—Glass compositions
- C03C2201/06—Doped silica-based glasses
- C03C2201/20—Doped silica-based glasses containing non-metals other than boron or halide
- C03C2201/23—Doped silica-based glasses containing non-metals other than boron or halide containing hydroxyl groups
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2203/00—Production processes
- C03C2203/40—Gas-phase processes
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Glass Compositions (AREA)
- Glass Melting And Manufacturing (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Description
−コンパクトな石英ガラスに分子状水素を導入する。
−高純度の原料を使用する。
−塩素を含まない原料を使用する。
−石英ガラスにフッ素等をドーピングする。
10 マッフル炉
11乃至13 シェル
14 炉内空間
15 小さい開口部
16 バーナー
17 大きい開口部
18 プリフォーム
19 放物面状の側面
20 境界面
21 頂部
22 プラトー
23 火炎
X−X 回転軸
Y−Y バーナーの軸
Claims (6)
- 原材料としてSiCl4を用いて、火炎加水分解およびそれに続く冷却により製造された合成石英ガラスから成り、波長250nm以下の高エネルギーDUV輻射に使用するのに適したプリフォームにおいて、
そのプリフォームのコア部であって、OH含有量≧1250ppm、応力複屈折≦5nm/cm、H2含有量≧1×1018分子/cm3、Cl含有量≦20ppm、微量不純物元素Cr、Co、Fe、Ni、Cu、V、Zn、Al、Li、K、Na含有量最大500ppbであり、且つ、実質的に層状構造を含まず、そして、波長λ1=248nm、レーザー入射周波数≧300Hz、レーザー入射回数≧109、エネルギー密度≦10mJ/cm2、または波長λ2=193nm、レーザー入射周波数≧300Hz、レーザー入射回数≧109、エネルギー密度≦5mJ/cm2の条件で照射したときの高エネルギーDUV輻射に対して耐性を有し、特に、波長λ1=248nm、レーザー入射周波数=300Hz、レーザー入射回数=109、エネルギー密度=10mJ/cm2、または波長λ2=193nm、レーザー入射周波数=300Hz、レーザー入射回数=109、エネルギー密度=5mJ/cm2の条件で照射したときの高エネルギーDUV輻射に対する耐性が、厚さ1cmにつきΔT≦0.1%の透過率低下で示されるコア部を有することを特徴とするプリフォーム。 - 照射条件を変化させたとき、透過率低下は変化するが、同じダメージ挙動に準ずることを特徴とする、請求項1のプリフォーム。
- コア部の直径がプリフォームの直径の少なくとも50%であることを特徴とする、請求項2のプリフォーム。
- 全く層状構造を含まないことを特徴とする、請求項3のプリフォーム。
- コア部のOH含有量が許容差±10ppmの範囲内で一定であることを特徴とする、請求項1のプリフォーム。
- コア部の少なくとも一部において屈折率の均一性が≦0.5×10-6であることを特徴とする、請求項1から5のいずれかのプリフォーム。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19709379 | 1997-03-07 | ||
| DE19709379.5 | 1997-03-07 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP53919898A Division JP4189441B2 (ja) | 1997-03-07 | 1998-03-06 | 合成石英ガラス製プリフォームおよびその製造装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2008044843A JP2008044843A (ja) | 2008-02-28 |
| JP4834635B2 true JP4834635B2 (ja) | 2011-12-14 |
Family
ID=7822572
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP53919898A Expired - Fee Related JP4189441B2 (ja) | 1997-03-07 | 1998-03-06 | 合成石英ガラス製プリフォームおよびその製造装置 |
| JP2007250259A Expired - Lifetime JP4834635B2 (ja) | 1997-03-07 | 2007-09-26 | 合成石英ガラス製プリフォーム |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP53919898A Expired - Fee Related JP4189441B2 (ja) | 1997-03-07 | 1998-03-06 | 合成石英ガラス製プリフォームおよびその製造装置 |
Country Status (6)
| Country | Link |
|---|---|
| US (2) | US6423656B1 (ja) |
| EP (1) | EP0964832B1 (ja) |
| JP (2) | JP4189441B2 (ja) |
| AT (1) | ATE201390T1 (ja) |
| DE (1) | DE59800763D1 (ja) |
| WO (1) | WO1998040319A1 (ja) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19850736C2 (de) | 1998-11-04 | 2003-04-17 | Heraeus Tenevo Ag | Kernglas für eine Vorform für eine optische Faser, unter Verwendung des Kernglases hergestellte Vorform, sowie Verfahren zur Herstellung des Kernglases einer Vorform für eine optische Faser |
| JP4601022B2 (ja) * | 1999-03-04 | 2010-12-22 | 信越石英株式会社 | ArFエキシマレーザーリソグラフィー用合成石英ガラス部材 |
| JP4304409B2 (ja) * | 1999-04-21 | 2009-07-29 | 株式会社ニコン | 石英ガラス部材の製造方法 |
| EP1129998B1 (en) * | 1999-07-05 | 2012-03-21 | Nikon Corporation | Method for producing quartz glass member |
| ATE289282T1 (de) | 1999-10-14 | 2005-03-15 | Schott Ag | Anordnung zur erzeugung optisch homogener, schlierenfreier quarzglaskörper durch flammenhydrolyse |
| DE50312961D1 (de) * | 2002-03-01 | 2010-09-23 | Schott Ag | Verfahren zu Herstellung von Quarzglas und einer Quarzglasvorform |
| EP1471038A3 (de) * | 2003-04-26 | 2005-11-23 | Schott Ag | Verfahren zur Herstellung von Glaskörpern aus dotiertem Quarzglas |
| US7265070B2 (en) * | 2003-11-26 | 2007-09-04 | Corning Incorporated | Synthetic silica glass optical material having high resistance to optically induced index change |
| EP1690837A1 (de) * | 2005-02-10 | 2006-08-16 | Schott AG | Synthetisches Quarzglas sowie Verfahren zur Herstellung eines Quarzglas-Körpers |
| US20060218971A1 (en) * | 2005-02-10 | 2006-10-05 | Rolf Martin | Synthetic quartz glass and process for producing a quartz glass body |
| US9399000B2 (en) | 2006-06-20 | 2016-07-26 | Momentive Performance Materials, Inc. | Fused quartz tubing for pharmaceutical packaging |
| DE102008063299B4 (de) * | 2008-12-29 | 2012-12-06 | J-Fiber Gmbh | Verfahren zur Herstellung eines kompakten synthetischen Quarzglases, ein Muffelofen zur Durchführung des Verfahrens, sowie das damit erhaltene Quarzglas |
| JP5737070B2 (ja) * | 2010-09-02 | 2015-06-17 | 信越化学工業株式会社 | チタニアドープ石英ガラス及びその製造方法 |
| DE102012000418A1 (de) * | 2011-12-23 | 2013-06-27 | J-Plasma Gmbh | Verfahren zum Herstellen von Stablinsen und Vorrichtung hierfür |
| US9903054B2 (en) | 2014-08-27 | 2018-02-27 | Nike, Inc. | Knitted component having tensile strand for adjusting auxetic portion |
Family Cites Families (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4398474A (en) * | 1979-02-09 | 1983-08-16 | Pyreflex Corporation | Insulating structure for high temperature devices |
| JPS6041538A (ja) * | 1983-08-16 | 1985-03-05 | Sumitomo Electric Ind Ltd | 窓くもり防止装置 |
| US4707173A (en) * | 1986-05-15 | 1987-11-17 | The Furukawa Electric Co., Ltd. | Method of fabricating porous glass rod and apparatus for fabricating the same |
| JPS63123831A (ja) | 1986-11-10 | 1988-05-27 | Sumitomo Electric Ind Ltd | 光フアイバ用母材の製造方法 |
| JPS63248734A (ja) * | 1987-04-06 | 1988-10-17 | Hitachi Cable Ltd | 光フアイバ母材の製造方法 |
| JPH01257146A (ja) | 1988-04-05 | 1989-10-13 | Japan Metals & Chem Co Ltd | 合成石英インゴット製造用保温炉 |
| EP0401845B2 (en) | 1989-06-09 | 2001-04-11 | Heraeus Quarzglas GmbH & Co. KG | Optical members and blanks of synthetic silica glass and method for their production |
| JPH0627013B2 (ja) * | 1989-06-14 | 1994-04-13 | 信越石英株式会社 | 紫外線レーザ用合成シリカガラス光学体及びその製造方法 |
| US5410428A (en) * | 1990-10-30 | 1995-04-25 | Shin-Etsu Quartz Products Co. Ltd. | Optical member made of high-purity and transparent synthetic silica glass and method for production thereof or blank thereof |
| JPH04193730A (ja) * | 1990-11-26 | 1992-07-13 | Fujikura Ltd | 光ファイバ母材の製造方法および酸水素バーナ用フード |
| DE4203287C2 (de) | 1992-02-03 | 1994-05-26 | Bql Burgauer Quarzglasschmelze | Verfahren zum Kontrollieren des Abstandes zwischen einem Brenner und einer rotierenden, in Achsrichtung verstellbaren Ablagerungsfläche für glasiges Material und Vorrichtung zur Durchführung des Verfahrens |
| US5352230A (en) * | 1992-02-19 | 1994-10-04 | Biomet, Inc. | Pneumatic impulse tool |
| JP3007510B2 (ja) * | 1993-04-27 | 2000-02-07 | 信越化学工業株式会社 | 合成石英ガラス部材の製造方法 |
| JP3137517B2 (ja) | 1993-11-17 | 2001-02-26 | 信越化学工業株式会社 | 合成石英ガラス部材の製造方法および合成石英ガラス製造用バーナー |
| JP3194667B2 (ja) * | 1994-03-26 | 2001-07-30 | 信越石英株式会社 | 光学用合成石英ガラス成形体及びその製造方法 |
| JP3705501B2 (ja) * | 1994-08-03 | 2005-10-12 | 信越化学工業株式会社 | エキシマレーザ光学素材用合成石英ガラス部材の製造方法 |
| JP2936138B2 (ja) * | 1995-01-06 | 1999-08-23 | 株式会社ニコン | 石英ガラス、それを含む光学部材、並びにその製造方法 |
| US6087283A (en) * | 1995-01-06 | 2000-07-11 | Nikon Corporation | Silica glass for photolithography |
| US5707908A (en) * | 1995-01-06 | 1998-01-13 | Nikon Corporation | Silica glass |
| JP3064857B2 (ja) | 1995-03-28 | 2000-07-12 | 株式会社ニコン | 光リソグラフィー用光学部材および合成石英ガラスの製造方法 |
| EP0850201B1 (en) * | 1995-09-12 | 2003-07-16 | Corning Incorporated | Containment vessel for producing fused silica glass |
| EP0780345A1 (en) | 1995-12-22 | 1997-06-25 | Corning Incorporated | Optical element for UV transmission |
| US5958809A (en) * | 1996-08-21 | 1999-09-28 | Nikon Corporation | Fluorine-containing silica glass |
| US6543257B1 (en) * | 1999-05-28 | 2003-04-08 | The Furukawa Electric Co., Ltd. | Dehydration and sintering apparatus for porous optical fiber preform |
| ATE289282T1 (de) * | 1999-10-14 | 2005-03-15 | Schott Ag | Anordnung zur erzeugung optisch homogener, schlierenfreier quarzglaskörper durch flammenhydrolyse |
-
1998
- 1998-03-06 DE DE59800763T patent/DE59800763D1/de not_active Revoked
- 1998-03-06 US US09/381,490 patent/US6423656B1/en not_active Expired - Lifetime
- 1998-03-06 WO PCT/EP1998/001311 patent/WO1998040319A1/de not_active Ceased
- 1998-03-06 AT AT98921387T patent/ATE201390T1/de not_active IP Right Cessation
- 1998-03-06 EP EP98921387A patent/EP0964832B1/de not_active Revoked
- 1998-03-06 JP JP53919898A patent/JP4189441B2/ja not_active Expired - Fee Related
-
2002
- 2002-05-30 US US10/161,433 patent/US6920766B2/en not_active Expired - Fee Related
-
2007
- 2007-09-26 JP JP2007250259A patent/JP4834635B2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| ATE201390T1 (de) | 2001-06-15 |
| DE59800763D1 (de) | 2001-06-28 |
| JP2001516325A (ja) | 2001-09-25 |
| JP2008044843A (ja) | 2008-02-28 |
| US20020148256A1 (en) | 2002-10-17 |
| EP0964832A1 (de) | 1999-12-22 |
| EP0964832B1 (de) | 2001-05-23 |
| WO1998040319A1 (de) | 1998-09-17 |
| JP4189441B2 (ja) | 2008-12-03 |
| US6920766B2 (en) | 2005-07-26 |
| US6423656B1 (en) | 2002-07-23 |
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