HK113395A - Optical scanning device - Google Patents

Optical scanning device

Info

Publication number
HK113395A
HK113395A HK113395A HK113395A HK113395A HK 113395 A HK113395 A HK 113395A HK 113395 A HK113395 A HK 113395A HK 113395 A HK113395 A HK 113395A HK 113395 A HK113395 A HK 113395A
Authority
HK
Hong Kong
Prior art keywords
objective lens
motion
lens
cylindrical lens
mutually perpendicular
Prior art date
Application number
HK113395A
Other languages
English (en)
Inventor
Christian Buechler
Yasuaki Morimoto
Original Assignee
Thomson Brandt Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Thomson Brandt Gmbh filed Critical Thomson Brandt Gmbh
Publication of HK113395A publication Critical patent/HK113395A/xx

Links

Classifications

    • 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
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only
    • G11B7/0909—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only by astigmatic methods
    • 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
    • G11B7/1365—Separate or integrated refractive elements, e.g. wave plates
    • 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
    • G11B7/1372—Lenses
    • G11B7/1378—Separate aberration correction lenses; Cylindrical lenses to generate astigmatism; Beam expanders

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Vehicle Body Suspensions (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Optical Communication System (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Microscoopes, Condenser (AREA)
  • Holo Graphy (AREA)
HK113395A 1990-02-16 1995-07-13 Optical scanning device HK113395A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4004858A DE4004858A1 (de) 1990-02-16 1990-02-16 Optische abtastvorrichtung

Publications (1)

Publication Number Publication Date
HK113395A true HK113395A (en) 1995-07-21

Family

ID=6400308

Family Applications (1)

Application Number Title Priority Date Filing Date
HK113395A HK113395A (en) 1990-02-16 1995-07-13 Optical scanning device

Country Status (11)

Country Link
EP (1) EP0515422B1 (ja)
JP (1) JP2930137B2 (ja)
CN (1) CN1023920C (ja)
AT (1) ATE110875T1 (ja)
AU (1) AU7215791A (ja)
DE (2) DE4004858A1 (ja)
ES (1) ES2063491T3 (ja)
FI (1) FI923636A0 (ja)
HK (1) HK113395A (ja)
HU (1) HUT62419A (ja)
WO (1) WO1991012609A1 (ja)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3191200B2 (ja) * 1994-11-10 2001-07-23 コニカ株式会社 光情報記録媒体の記録再生装置
US5675686A (en) * 1995-07-05 1997-10-07 W. L. Gore & Associates, Inc. Buffer material for optical signal transmission media
JP2001034999A (ja) * 1999-05-14 2001-02-09 Fujitsu Ltd 光情報記憶装置および光学素子
CN101049720B (zh) * 2006-04-05 2010-09-01 鸿富锦精密工业（深圳）有限公司 模具对芯侦测器、侦测方法及具有该对芯侦测器的模具组合
CN107064563B (zh) * 2017-03-29 2020-06-23 中国科学院苏州纳米技术与纳米仿生研究所 基于扫描探针的光路减震装置及方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6038771B2 (ja) * 1978-06-19 1985-09-03 パイオニア株式会社 光学式情報読取装置のサ−ボ装置
JPS5971141A (ja) * 1982-10-14 1984-04-21 Mitsubishi Electric Corp 光学的信号読出し装置
JPH01130332A (ja) * 1987-11-17 1989-05-23 Toshiba Corp 焦点制御装置

Also Published As

Publication number Publication date
WO1991012609A1 (de) 1991-08-22
DE59102748D1 (de) 1994-10-06
JP2930137B2 (ja) 1999-08-03
ATE110875T1 (de) 1994-09-15
CN1023920C (zh) 1994-03-02
HUT62419A (en) 1993-04-28
CN1054848A (zh) 1991-09-25
FI923636A (fi) 1992-08-14
JPH05504224A (ja) 1993-07-01
ES2063491T3 (es) 1995-01-01
EP0515422A1 (de) 1992-12-02
DE4004858A1 (de) 1991-08-22
FI923636A0 (fi) 1992-08-14
EP0515422B1 (de) 1994-08-31
AU7215791A (en) 1991-09-03

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Legal Events

Date Code Title Description
PF Patent in force
PE Patent expired

Effective date: 20110205