DE3782895D1 - Optischer lesekopf. - Google Patents
Optischer lesekopf.Info
- Publication number
- DE3782895D1 DE3782895D1 DE8787113051T DE3782895T DE3782895D1 DE 3782895 D1 DE3782895 D1 DE 3782895D1 DE 8787113051 T DE8787113051 T DE 8787113051T DE 3782895 T DE3782895 T DE 3782895T DE 3782895 D1 DE3782895 D1 DE 3782895D1
- Authority
- DE
- Germany
- Prior art keywords
- light beam
- lens system
- object lens
- passed
- reflected light
- 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 - Fee Related
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
- G11B7/12—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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
- Geophysics And Detection Of Objects (AREA)
- Wire Bonding (AREA)
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
- Holo Graphy (AREA)
- Light Guides In General And Applications Therefor (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61220311A JP2633535B2 (ja) | 1986-09-18 | 1986-09-18 | 光学ピツクアツプ装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3782895D1 true DE3782895D1 (de) | 1993-01-14 |
DE3782895T2 DE3782895T2 (de) | 1993-06-17 |
Family
ID=16749152
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8787113051T Expired - Fee Related DE3782895T2 (de) | 1986-09-18 | 1987-09-07 | Optischer lesekopf. |
Country Status (6)
Country | Link |
---|---|
US (1) | US4791625A (de) |
EP (1) | EP0260569B1 (de) |
JP (1) | JP2633535B2 (de) |
KR (2) | KR880004446A (de) |
AT (1) | ATE83088T1 (de) |
DE (1) | DE3782895T2 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5208801A (en) * | 1988-02-05 | 1993-05-04 | Tandy Corporation | Method and apparatus for correcting focus in an optical recording system |
JP2591099B2 (ja) * | 1988-09-29 | 1997-03-19 | 旭硝子株式会社 | レーザ共振型光ピックアップ |
FR2642883B1 (de) * | 1989-02-09 | 1995-06-02 | Asahi Optical Co Ltd | |
EP0390116B1 (de) * | 1989-03-31 | 1995-06-14 | Kabushiki Kaisha Toshiba | Optisches Informationsverarbeitungssystem |
JPH03154239A (ja) * | 1989-11-10 | 1991-07-02 | Pioneer Electron Corp | 光ディスクカッティング装置 |
JP2655923B2 (ja) * | 1990-01-22 | 1997-09-24 | シャープ株式会社 | 光ヘッド装置 |
AU7691391A (en) * | 1990-04-23 | 1991-11-11 | Tandy Corporation | Method and apparatus for correcting focus in an optical recording system |
JPH0777031B2 (ja) * | 1991-10-16 | 1995-08-16 | インターナショナル・ビジネス・マシーンズ・コーポレイション | 収差補償装置 |
US5625609A (en) * | 1995-03-13 | 1997-04-29 | International Business Machines Corporation | Multiple data layer optical disk drive system with fixed aberration correction and optimum interlayer spacing |
US6192022B1 (en) * | 1997-05-23 | 2001-02-20 | U.S. Philips Corporation | Focusing a light beam more than thirty focal depths from the aplanatic point with a plano-convex lens |
JP2000132859A (ja) * | 1998-10-23 | 2000-05-12 | Fujitsu Ltd | 光記憶装置及び光ピックアップ |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4191462A (en) * | 1978-04-24 | 1980-03-04 | Polaroid Corporation | Fixed focus exposure control apparatus with reverse spherical aberration corrective characteristic |
FR2460022B1 (fr) * | 1979-06-25 | 1987-09-11 | Hitachi Ltd | Systeme optique de reproduction d'informations |
JPS566038U (de) * | 1979-06-25 | 1981-01-20 | ||
FR2470391A1 (fr) * | 1979-11-21 | 1981-05-29 | Thomson Csf | Dispositif optique stigmatique d'emission-reception de rayonnements coherents et tete optique d'enregistrement-lecture comprenant un tel dispositif |
JPS56145529A (en) * | 1980-04-15 | 1981-11-12 | Matsushita Electric Ind Co Ltd | Signal recording and reproducing system |
JPS595446A (ja) * | 1982-07-02 | 1984-01-12 | Matsushita Electric Ind Co Ltd | 光学式ピツクアツプ装置 |
JPS5914145A (ja) * | 1982-07-14 | 1984-01-25 | Minolta Camera Co Ltd | 光デイスク用光学装置 |
JPS59176715A (ja) * | 1983-03-26 | 1984-10-06 | Nippon Kogaku Kk <Nikon> | 対物レンズ |
-
1986
- 1986-09-18 JP JP61220311A patent/JP2633535B2/ja not_active Expired - Fee Related
-
1987
- 1987-09-07 DE DE8787113051T patent/DE3782895T2/de not_active Expired - Fee Related
- 1987-09-07 AT AT87113051T patent/ATE83088T1/de not_active IP Right Cessation
- 1987-09-07 EP EP87113051A patent/EP0260569B1/de not_active Expired - Lifetime
- 1987-09-10 US US07/095,021 patent/US4791625A/en not_active Expired - Lifetime
- 1987-09-16 KR KR870010253A patent/KR880004446A/ko not_active Application Discontinuation
-
1996
- 1996-02-08 KR KR96001898U patent/KR0121313Y1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
EP0260569A3 (en) | 1989-05-10 |
EP0260569B1 (de) | 1992-12-02 |
DE3782895T2 (de) | 1993-06-17 |
ATE83088T1 (de) | 1992-12-15 |
EP0260569A2 (de) | 1988-03-23 |
JPS6374133A (ja) | 1988-04-04 |
JP2633535B2 (ja) | 1997-07-23 |
KR0121313Y1 (en) | 1998-08-01 |
KR880004446A (ko) | 1988-06-04 |
US4791625A (en) | 1988-12-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8328 | Change in the person/name/address of the agent |
Free format text: PATENTANWAELTE MUELLER & HOFFMANN, 81667 MUENCHEN |
|
8339 | Ceased/non-payment of the annual fee |