CA2043387A1 - Tete optique - Google Patents
Tete optiqueInfo
- Publication number
- CA2043387A1 CA2043387A1 CA2043387A CA2043387A CA2043387A1 CA 2043387 A1 CA2043387 A1 CA 2043387A1 CA 2043387 A CA2043387 A CA 2043387A CA 2043387 A CA2043387 A CA 2043387A CA 2043387 A1 CA2043387 A1 CA 2043387A1
- Authority
- CA
- Canada
- Prior art keywords
- light
- diffracting element
- photodetector
- elliptic
- intensity distribution
- 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.)
- Granted
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
- G11B7/1353—Diffractive elements, e.g. holograms or gratings
-
- 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
-
- 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
- G11B7/094—Methods and circuits for servo offset compensation
-
- 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
- G11B7/13—Optical detectors therefor
- G11B7/131—Arrangement of detectors in a multiple array
-
- 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
- G11B7/1398—Means for shaping the cross-section of the beam, e.g. into circular or elliptical cross-section
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
- Optical Recording Or Reproduction (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2-138893 | 1990-05-29 | ||
JP2138893A JP2656136B2 (ja) | 1990-05-29 | 1990-05-29 | 光ピックアップ装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2043387A1 true CA2043387A1 (fr) | 1991-11-30 |
CA2043387C CA2043387C (fr) | 1996-03-19 |
Family
ID=15232586
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002043387A Expired - Lifetime CA2043387C (fr) | 1990-05-29 | 1991-05-28 | Tete optique |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0459764B1 (fr) |
JP (1) | JP2656136B2 (fr) |
KR (1) | KR960011790B1 (fr) |
CA (1) | CA2043387C (fr) |
DE (1) | DE69123489T2 (fr) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3058386B2 (ja) * | 1992-09-10 | 2000-07-04 | 株式会社東芝 | 光学ヘッド装置及びこれを用いた光ディスク装置 |
US5615200A (en) * | 1992-09-10 | 1997-03-25 | Kabushiki Kaisha Toshiba | Light beam shaping device to change an anisotropic beam to an isotropic beam for reducing the size of an optical head |
KR0139177B1 (ko) * | 1993-06-11 | 1998-06-01 | 김광호 | 초점에러 및 트랙킹에러를 검출하기 위하여 홀로그램을 사용하는 광헤드 |
DE19530740A1 (de) * | 1995-08-22 | 1997-02-27 | Thomson Brandt Gmbh | Optische Abtasteinrichtung |
KR100588941B1 (ko) * | 2004-08-03 | 2006-06-09 | 주식회사 대우일렉트로닉스 | 실린드리컬 방식의 홀로그래픽 데이터 기록 장치 및 그제어 방법 |
JP4083720B2 (ja) * | 2004-09-17 | 2008-04-30 | シャープ株式会社 | 光ピックアップ装置 |
US9746412B2 (en) | 2012-05-30 | 2017-08-29 | Iris International, Inc. | Flow cytometer |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4333173A (en) * | 1979-06-15 | 1982-06-01 | Hitachi, Ltd. | Optical information processor with prismatic correction of laser beam shape |
JPS62219340A (ja) * | 1986-03-20 | 1987-09-26 | Fujitsu Ltd | 光ピツクアツプ |
DE3855936T2 (de) * | 1987-08-24 | 1998-01-02 | Sharp Kk | Optische Abtastvorrichtung |
JPH0770065B2 (ja) * | 1988-04-20 | 1995-07-31 | シャープ株式会社 | 光ピックアップ装置 |
JPH01279433A (ja) * | 1988-05-02 | 1989-11-09 | Asahi Chem Ind Co Ltd | 光ピックアップ |
JPH0721869B2 (ja) * | 1990-04-20 | 1995-03-08 | シャープ株式会社 | 光ピックアップ装置 |
JP2975395B2 (ja) * | 1990-05-15 | 1999-11-10 | シャープ株式会社 | 光ピックアップ装置 |
-
1990
- 1990-05-29 JP JP2138893A patent/JP2656136B2/ja not_active Expired - Lifetime
-
1991
- 1991-05-23 KR KR1019910008324A patent/KR960011790B1/ko not_active IP Right Cessation
- 1991-05-28 CA CA002043387A patent/CA2043387C/fr not_active Expired - Lifetime
- 1991-05-29 DE DE69123489T patent/DE69123489T2/de not_active Expired - Lifetime
- 1991-05-29 EP EP91304820A patent/EP0459764B1/fr not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
KR910020667A (ko) | 1991-12-20 |
JPH0432038A (ja) | 1992-02-04 |
KR960011790B1 (ko) | 1996-08-30 |
EP0459764B1 (fr) | 1996-12-11 |
JP2656136B2 (ja) | 1997-09-24 |
DE69123489D1 (de) | 1997-01-23 |
DE69123489T2 (de) | 1997-05-28 |
EP0459764A2 (fr) | 1991-12-04 |
CA2043387C (fr) | 1996-03-19 |
EP0459764A3 (en) | 1992-01-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKEX | Expiry |