KR890007236A - 광학장치 - Google Patents

광학장치 Download PDF

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Publication number
KR890007236A
KR890007236A KR1019880013493A KR880013493A KR890007236A KR 890007236 A KR890007236 A KR 890007236A KR 1019880013493 A KR1019880013493 A KR 1019880013493A KR 880013493 A KR880013493 A KR 880013493A KR 890007236 A KR890007236 A KR 890007236A
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KR
South Korea
Prior art keywords
optical
prism
radiation
ulaston
axis
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KR1019880013493A
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English (en)
Inventor
기미오 다쯔노
오프슈르 얀
요하네스 반데르 푈 카롤루스
라인데르트 드렌텐 로날드
Original Assignee
이반 밀러 레르니
엔.브이 필립스 글로아이람펜파브리켄
미따 가쓰시게
가부기끼 가이샤 히다찌 세이사꾸쇼
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Application filed by 이반 밀러 레르니, 엔.브이 필립스 글로아이람펜파브리켄, 미따 가쓰시게, 가부기끼 가이샤 히다찌 세이사꾸쇼 filed Critical 이반 밀러 레르니
Publication of KR890007236A publication Critical patent/KR890007236A/ko

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0052—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a laser diode
    • G02B19/0057—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a laser diode in the form of a laser diode array, e.g. laser diode bar
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0009—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only
    • G02B19/0014—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only at least one surface having optical power
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0938—Using specific optical elements
    • G02B27/095—Refractive optical elements
    • G02B27/0972—Prisms
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/127—Lasers; Multiple laser arrays
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1359—Single prisms
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1395—Beam splitters or combiners
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1398—Means for shaping the cross-section of the beam, e.g. into circular or elliptical cross-section

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Head (AREA)
  • Semiconductor Lasers (AREA)

Abstract

내용 없음

Description

광학장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 반도체 다이오드 레이저 배열의 투시도,
제2a 및2b도, 제2c 및 2d도는 두 이미터 다이오드 레이저의 근거리 필드세기 및 위상분포, 원거리 필드세기 및 위상분포의 구성도.

Claims (12)

  1. 단일 방사 빔을 발산하기 위한 광학장치에 있어서, 측평면에 있어서 방사의 대칭축을 통과하며, 레이저 배열의 PN접합층에 평행한 두 원거리 필드 로우브를 갖는 높은 배열 수퍼모드로 방사하는 위상고정 된 다이오드 레이저 배열 및 시준렌즈를 구비하며, 상기 시준렌즈 배면에 상기 배열로 측면 로우브중 한 통로에 편광 회전자와, 두 측면보다 원거리 필드 로우브에는 편광감지 빔 혼합기가 배열되는 것을 특징으로 하는 광학 장치.
  2. 제1항에 있어서, 상기 빔 혼합기가 울라스톤 프리즘이며, 편광회전자 및 울라스톤 프리즘사이에 구성된 빔 편향기가 울라스톤 프리즘에 교차되도록 두 로우브의 방사축을 향하게 배열되는 것을 특징으로 하는 광학장치.
  3. 제2항에 있어서, 상기 구성된 빔 편향기가 그중 광학 웨지인 것을 특징으로 하는 광학장치.
  4. 제2항 또는 제3항에 있어서, 상기 울라스톤 프리즘이 같은 광학 축을 가지며, 대체로 같은 형태 및 치수를 갖는 두 외부 성분 프리즘과, 반면에, 상이한 형태 및 상이한 치수 및 외부 성분 프리즘의 광학축에 수직인 광학축을 갖는 중앙성분 프리즘과, 서로 배열된 후에 복굴절 재료의 3성분 프리즘을 구비하는 것을 특징으로 하는 광학장치.
  5. 제1항에 있어서, 상기 평광 감지 빔 혼합기가 평판과 함께 각각 45°상이한 방햐을 가지며, 서로 교차하는 평판의 광학축 서로에 평행인 제1 및 제2복굴절 평판을 구비하는 것을 특징으로 하는 광학장치.
  6. 제5항에 있어서, 상기 시준렌즈와 제1복구절 평판 사이에 배열된 빔 회절기를 구비하는 것을 특징으로 하는 광학장치.
  7. 제5항 또는 제6항에 있어서, 상기 제1 및 제2 복굴절 평판사이에 다이오드 레이저 방사의 파장인 入로 入/2-평판이 배열되는 것을 특징으로 하는 광학장치.
  8. 제1항 내지 제7항중 어느 한항에 있어서, 상기 편광감지 빔 혼합기 배면에, 상기 배열에 따라, 루사방사의 축에 대해 기울어진 인입 표면을 측 평면으로 갖는 최소한 하나의 프리즘인 프리즘 시스템 및 임의 방사축에 수직인 출구표면과, 다이오드 레이저 배열의 측면 원거리 필드에 있어서 공간 필터를 배열하는 것을 특징으로 하는 광학장치.
  9. 광학기록 캐리어를 광학적으로 기록하기 위한 장치에 있어서, 기록되기 위한 정보의 세기에 따라 변조된 방사 스포트를 발생하기 위한 광학헤드를 구비하며, 상기 광학헤드가 선행항중 어느 한항에 청구된 광학장치와, 회절이 한정된 라운드 스포트에 상기 소자로부터 방사된 빔을 상기 기록 캐리어로 집중시키기 위한 대물렌즈를 구비하는 것을 특징으로 하는 광학적으로 기록하기 위한 장치.
  10. 기록 캐리어를 판독하기 위한 장치에 있어서, 방사 스포트가 기록 캐리어를 주사하기 위해 발생되는 광학헤드를 구비하며, 제1항 내지 제8항중의 어느 한항에 청구된 광학헤드와 한정된 화절 스포트에 상기 장치에서 발생된 빔을 기록 캐리어로 집중되도록 하기 위한 대물랜즈를 구비하는 것을 특징으로 하는 기록 캐리어를 판독하기 위한 장치.
  11. 기록매체로 정보를 레이저 프린팅 하기 위한 장치에 있어서, 제1방향으로 움직일 수 있는 기록매체 캐리어와, 제1방향에 수직인 제2방향을 따라 방사빔을 주사하기 위한 빔 회절기를 구비하며, 기록매체로 한정된 회절방사 스포트에 대물렌즈에 의해 집중되며, 대체로 시준된 빔을 발생하기 위해, 청구된 제1항 내지 제8항중의 어느 한항의 광학장치를 구비하는 것을 특징으로 하는 기록매체로 정보를 레이저 프린팅 하기 위한 장치.
  12. 제9항 및 제10항 또는 제11항에 있어서, 광학장치의 공간필터가 대물렌즈의 인입동공에 의해 구성된 것을 특징으로 하는 장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019880013493A 1987-10-19 1988-10-15 광학장치 KR890007236A (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP87201996.3 1987-10-19
EP87201996A EP0312652B1 (en) 1987-10-19 1987-10-19 Optical device with phase-locked diodelaser array

Publications (1)

Publication Number Publication Date
KR890007236A true KR890007236A (ko) 1989-06-19

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US (1) US4822151A (ko)
EP (1) EP0312652B1 (ko)
JP (1) JPH01271928A (ko)
KR (1) KR890007236A (ko)
DE (1) DE3787285T2 (ko)

Families Citing this family (56)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0734069B2 (ja) * 1987-07-08 1995-04-12 富士写真フイルム株式会社 位相同期半導体レ−ザ光学系
US5289313A (en) * 1988-09-28 1994-02-22 Canon Kabushiki Kaisha Optical head using semiconductor laser array as light source
US4882594A (en) * 1988-10-03 1989-11-21 Polaroid Corporation Method for making a smooth, uniform image of a laser diode array
US5173799A (en) * 1988-10-12 1992-12-22 Fuji Electric Co., Ltd. Wavelength conversion device
JPH02139526A (ja) * 1988-11-21 1990-05-29 Fuji Photo Film Co Ltd 光増幅装置
US5157459A (en) * 1989-08-29 1992-10-20 Asahi Kogaku Kogyo Kabushiki Kaisha Wave front aberration measuring apparatus
JPH03157843A (ja) * 1989-11-16 1991-07-05 Sony Corp 光学ピックアップ装置
JPH03178046A (ja) * 1989-12-07 1991-08-02 Sanyo Electric Co Ltd 光ヘッド装置
DK0541658T3 (da) * 1990-08-01 2000-06-05 Diomed Ltd Lyskilde til store effekter
JPH0492236A (ja) * 1990-08-07 1992-03-25 Asahi Optical Co Ltd 光ディスク装置の光学系
CH682698A5 (de) * 1990-11-01 1993-10-29 Fisba Optik Ag Bystronic Laser Verfahren, bei dem mehrere, in einer oder mehreren Reihen angeordnete Strahlungsquellen abgebildet werden und Vorrichtung hierzu.
JPH04281231A (ja) * 1990-11-30 1992-10-06 Toshiba Corp 光集束光学系
JPH052152A (ja) * 1990-12-19 1993-01-08 Hitachi Ltd 光ビーム作成方法、装置、それを用いた寸法測定方法、外観検査方法、高さ測定方法、露光方法および半導体集積回路装置の製造方法
US5530641A (en) * 1991-05-17 1996-06-25 Olympus Optical Co., Ltd. Optical recording medium having grooves and lands and/or plural pit lines, and reproducing apparatus therefor
US5646778A (en) * 1991-05-28 1997-07-08 Discovision Associates Optical beamsplitter
US5331622A (en) * 1991-05-28 1994-07-19 Applied Magnetics Corporation Compact optical head
US5155633A (en) * 1991-07-30 1992-10-13 Applied Magnetics Corporation Anamorphic achromatic prism for optical disk heads
US5296958A (en) * 1992-05-29 1994-03-22 Eastman Kodak Company Multiple wavelength laser beam scanning system
US5194980A (en) * 1992-05-29 1993-03-16 Eastman Kodak Company Thresholded, high power laser beam scanning system
CN1119482A (zh) * 1993-02-03 1996-03-27 尼托公司 图像投影的方法和设备
KR100230227B1 (ko) * 1993-04-30 1999-11-15 윤종용 광픽업
US6366335B1 (en) * 1993-06-09 2002-04-02 U.S. Philips Corporation Polarization-sensitive beam splitter, method of manufacturing such a beam splitter and magneto-optical scanning device including such a beam splitter
JP2922113B2 (ja) * 1994-04-06 1999-07-19 松下電送システム株式会社 画像記録装置
US5861987A (en) * 1994-08-30 1999-01-19 Olympus Optical Co., Ltd. Stereoscopic-vision endoscope offering a large angle of introversion and a necessary and sufficient sense of three-dimensionality
DE59510499D1 (de) * 1995-01-11 2003-01-16 Dilas Diodenlaser Gmbh Optische anordnung zur verwendung bei einer laserdiodenanordnung
US5533152A (en) * 1995-05-02 1996-07-02 Eastman Kodak Company Method and apparatus for coupling light emitted from a multi-mode laser diode array to a multi-mode optical fiber
JP2905746B2 (ja) * 1996-11-06 1999-06-14 株式会社金田機械製作所 印刷用刷版露光装置
JPH11110808A (ja) * 1997-10-06 1999-04-23 Fujitsu Ltd 光学的情報記憶装置
JP3369101B2 (ja) * 1998-03-11 2003-01-20 富士写真フイルム株式会社 レーザ記録装置
EP1001297A1 (en) * 1998-11-10 2000-05-17 Datalogic S.P.A. Optical device and method for focusing a laser beam
US6529542B1 (en) * 2000-04-04 2003-03-04 Aculight Corporation Incoherent beam combined optical system utilizing a lens array
US6782028B2 (en) 2000-12-15 2004-08-24 The Furukawa Electric Co., Ltd. Semiconductor laser device for use in a semiconductor laser module and an optical amplifier
EP1215782A3 (en) * 2000-12-15 2004-01-07 The Furukawa Electric Co., Ltd. An integrated laser beam synthesizing module for use in a semiconductor laser module and an optical amplifier
CN1204662C (zh) 2000-12-15 2005-06-01 古河电气工业株式会社 半导体激光器模块及其制造方法和光放大器
JP2002252420A (ja) * 2000-12-15 2002-09-06 Furukawa Electric Co Ltd:The 半導体レーザ素子、半導体レーザモジュールおよびその製造方法ならびに光ファイバ増幅器
US20020176661A1 (en) * 2001-04-11 2002-11-28 Van Eck Timothy Edwin Hybrid one-dimensional mode-matching method between round and elliptical waveguide modes
US20020159112A1 (en) * 2001-04-13 2002-10-31 Coppeta David A. Device and method for reducing polarization dependent loss in an optical monitor device
JP2004006439A (ja) 2001-07-02 2004-01-08 Furukawa Electric Co Ltd:The 半導体レーザモジュール及びその製造方法
WO2003005509A1 (fr) 2001-07-02 2003-01-16 Furukawa Electric Co.,Ltd Module laser a semiconducteur, amplificateur de lumiere et procede de production de module laser a semiconducteur
WO2003005507A1 (fr) * 2001-07-02 2003-01-16 Furukawa Electric Co.,Ltd Module de laser semi-conducteur et son procede de production, et intensificateur
WO2003005106A1 (fr) * 2001-07-02 2003-01-16 Furukawa Electric Co., Ltd Module de laser semi-conducteur et amplificateur optique
EP1411601B1 (en) * 2001-07-02 2006-09-13 The Furukawa Electric Co., Ltd. Semiconductor laser module, optical amplifier, and method for manufacturing semiconductor laser module
WO2003005514A1 (fr) 2001-07-02 2003-01-16 The Furukawa Electric Co., Ltd Dispositif a laser a semiconducteur, module laser a semiconducteur, et amplificateur a fibres optiques utilisant ce module
US7408867B2 (en) 2002-04-04 2008-08-05 The Furukawa Electric Co., Ltd. Method of aligning an optical fiber, method of manufacturing a semiconductor laser module, and semiconductor laser module
US6661577B1 (en) * 2002-09-17 2003-12-09 Jds Uniphase Corporation Wavelength-selective laser beam splitter
US20040252376A1 (en) * 2003-06-10 2004-12-16 Jacques Gollier Beam converter for enhancing brightness of polarized light sources
US20070153864A1 (en) * 2005-11-02 2007-07-05 Luminus Devices, Inc. Lasers and methods associated with the same
DE102006050155B4 (de) * 2006-10-21 2016-06-09 Keming Du Anordnungen zur Formung von Laserstrahlen
US20090161196A1 (en) * 2007-12-20 2009-06-25 Barco Nv System and method for speckle reduction from a coherent light source in a projection device
US20090174867A1 (en) * 2008-01-08 2009-07-09 Barco Nv System and method for reducing image artifacts in a projection device using a scrolling refractive element
JP5573215B2 (ja) * 2010-02-12 2014-08-20 セイコーエプソン株式会社 プロジェクター及びアナモフィックプリズム光学ユニット
JP5473774B2 (ja) * 2010-05-17 2014-04-16 三菱電機株式会社 レーザ光源装置
US9379515B1 (en) * 2011-02-10 2016-06-28 Mellanox Technologies Silicon Photonics Inc. Laser combining light signals from multiple laser cavities
DE102018103131B4 (de) * 2018-02-13 2020-07-09 Innovavent Gmbh Vorrichtung zum Erzeugen einer Beleuchtungslinie, optisches System und Verfahren zum Verarbeiten mindestens eines eintreffenden Laserstrahls
CN116360189A (zh) * 2019-01-17 2023-06-30 杜比实验室特许公司 投影仪和用于提高投影光强度的方法
CN112297422B (zh) * 2020-10-09 2021-08-31 南开大学 一种一次成型的3d打印装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4160269A (en) * 1971-03-04 1979-07-03 U.S. Philips Corporation Apparatus for optically reading a phase-modulated optical record carrier
NL176314C (nl) * 1974-02-15 1985-03-18 Philips Nv Inrichting voor het uitlezen van een registratiedrager waarop informatie is aangebracht in een optisch uitleesbare structuur.
NL7414776A (nl) * 1974-11-13 1976-05-17 Philips Nv Inrichting voor het uitlezen van een registra- tiedrager met een optische informatiestruktuur.
US4517667A (en) * 1982-06-10 1985-05-14 Xerox Corporation Direct read after write optical disk system
CA1208466A (en) * 1982-07-28 1986-07-29 Donald R. Scifres Beam collimation and focusing of multi-emitter or broad emitter lasers
JPH0687316B2 (ja) * 1983-02-10 1994-11-02 オリンパス光学工業株式会社 光学式再生装置
EP0156901A1 (en) * 1983-10-03 1985-10-09 Storage Technology Partners Ii A multiple-path dichroic optical beam splitter
JPS60236274A (ja) * 1984-05-10 1985-11-25 Sharp Corp 半導体レ−ザ素子
US4742526A (en) * 1985-01-12 1988-05-03 Sharp Kabushiki Kaisha Semiconductor laser array device
US4722089A (en) * 1985-12-16 1988-01-26 Lytel, Incorporated Phase locked diode laser array

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EP0312652A1 (en) 1989-04-26
JPH01271928A (ja) 1989-10-31
DE3787285D1 (de) 1993-10-07
DE3787285T2 (de) 1994-03-31
US4822151A (en) 1989-04-18
EP0312652B1 (en) 1993-09-01

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