IT1285224B1 - Lettore ottico - Google Patents
Lettore otticoInfo
- Publication number
- IT1285224B1 IT1285224B1 IT96MI001993A ITMI961993A IT1285224B1 IT 1285224 B1 IT1285224 B1 IT 1285224B1 IT 96MI001993 A IT96MI001993 A IT 96MI001993A IT MI961993 A ITMI961993 A IT MI961993A IT 1285224 B1 IT1285224 B1 IT 1285224B1
- Authority
- IT
- Italy
- Prior art keywords
- optical reader
- reader
- optical
- Prior art date
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
-
- 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
- G11B7/08—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
- G11B7/13—Optical detectors therefor
- G11B7/133—Shape of individual detector elements
-
- 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
- G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
- G11B2007/0006—Recording, reproducing or erasing systems characterised by the structure or type of the carrier adapted for scanning different types of carrier, e.g. CD & DVD
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950033912A KR100200857B1 (ko) | 1995-10-04 | 1995-10-04 | 광픽업장치 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| ITMI961993A1 ITMI961993A1 (it) | 1998-03-27 |
| IT1285224B1 true IT1285224B1 (it) | 1998-06-03 |
Family
ID=19429195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT96MI001993A IT1285224B1 (it) | 1995-10-04 | 1996-09-27 | Lettore ottico |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US5802037A (it) |
| JP (1) | JPH09120557A (it) |
| KR (1) | KR100200857B1 (it) |
| DE (1) | DE19640838B4 (it) |
| FR (1) | FR2739716B1 (it) |
| GB (1) | GB2306070B (it) |
| IT (1) | IT1285224B1 (it) |
| NL (1) | NL1004078C2 (it) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6259668B1 (en) * | 1996-02-14 | 2001-07-10 | Samsung Electronics Co., Ltd. | Recording/reproducing apparatus having an optical pickup device to read from and record information to disks of different thicknesses |
| KR100224621B1 (ko) * | 1996-09-16 | 1999-10-15 | 윤종용 | 두께가 다른 디스크 호환을 위한 기록재생용 광픽업 |
| KR100195137B1 (ko) * | 1996-10-24 | 1999-06-15 | 윤종용 | 호환형 광픽업장치 |
| US6091690A (en) * | 1997-02-06 | 2000-07-18 | Matsushita Electric Industrial Co., Ltd. | Optical head device and optical information processing apparatus |
| JPH10233053A (ja) * | 1997-02-20 | 1998-09-02 | Alps Electric Co Ltd | ディスク判別装置およびディスク判別方法 |
| TW342493B (en) * | 1997-04-29 | 1998-10-11 | Ind Tech Res Inst | Digital video disc (DVD) optical head with dual-wavelength laser |
| KR100335408B1 (ko) * | 1998-03-03 | 2002-08-21 | 삼성전자 주식회사 | 포커스옵셋조정가능한광픽업장치 |
| JP3123500B2 (ja) * | 1998-03-12 | 2001-01-09 | 日本電気株式会社 | 光ディスク装置 |
| KR20070034604A (ko) * | 2004-06-29 | 2007-03-28 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | 구면수차 신호 에러를 발생하는 방법 및 시스템 |
Family Cites Families (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2724305A (en) * | 1951-09-04 | 1955-11-22 | Herman F Brandt | Apparatus for recording eye movement |
| FR2266932B1 (it) * | 1973-03-02 | 1977-09-02 | Thomson Brandt | |
| FR2235448B1 (it) * | 1973-06-29 | 1976-05-07 | Thomson Brandt | |
| GB1603596A (en) * | 1977-06-06 | 1981-11-25 | Mca Disco Vision | Optical transducer and focusing system |
| JPH0718761B2 (ja) * | 1980-09-19 | 1995-03-06 | 株式会社ニコン | 測光装置 |
| JPS58208944A (ja) * | 1982-05-31 | 1983-12-05 | Sony Corp | 光学ヘツド制御信号発生装置 |
| US4641296A (en) * | 1983-04-28 | 1987-02-03 | Nippon Kogaku K.K. | Optical head for information recording apparatus |
| US4704024A (en) * | 1983-12-09 | 1987-11-03 | Canon Kabushiki Kaisha | Photometric circuit for camera |
| JPS60185230A (ja) * | 1984-03-02 | 1985-09-20 | Pioneer Electronic Corp | 焦点誤差検出装置 |
| US4737946A (en) * | 1984-09-03 | 1988-04-12 | Omron Tateisi Electronics Co. | Device for processing optical data with improved optical allignment means |
| CA1258906A (en) * | 1985-04-22 | 1989-08-29 | Hiroshi Oinoue | Semiconductor laser apparatus for optical head |
| JPS63215942A (ja) * | 1987-03-04 | 1988-09-08 | Natl Aerospace Lab | 粒子径分布計測用光電変換センサ− |
| US4816665A (en) * | 1987-08-06 | 1989-03-28 | Maxtor Corporation | Sensor array for focus detection |
| US5146258A (en) * | 1990-12-24 | 1992-09-08 | Eastman Kodak Company | Multiple photodiode array for light metering |
| DE4140806A1 (de) * | 1991-12-11 | 1993-06-17 | Thomson Brandt Gmbh | Optische abtastvorrichtung |
| US5281797A (en) * | 1991-12-26 | 1994-01-25 | Hitachi, Ltd. | Short wavelength optical disk head having a changeable aperture |
| JPH05325245A (ja) * | 1992-05-20 | 1993-12-10 | Olympus Optical Co Ltd | 光記録媒体の情報記録／再生装置 |
| JP2532818B2 (ja) * | 1993-02-01 | 1996-09-11 | 松下電器産業株式会社 | 対物レンズおよび光ヘッド装置 |
| US5532999A (en) * | 1993-06-25 | 1996-07-02 | Matsushita Electric Industrial Co., Ltd. | Optical detector having stray carrier absorption regions between light receiving elements, and an optical head using the same |
| DE69608750T2 (de) * | 1995-03-15 | 2001-02-15 | Koninkl Philips Electronics Nv | Vorrichtung zum optischen abtasten eines auzeichnungsmediums |
-
1995
- 1995-10-04 KR KR1019950033912A patent/KR100200857B1/ko not_active IP Right Cessation
-
1996
- 1996-09-06 US US08/708,988 patent/US5802037A/en not_active Expired - Lifetime
- 1996-09-20 NL NL1004078A patent/NL1004078C2/nl not_active IP Right Cessation
- 1996-09-27 IT IT96MI001993A patent/IT1285224B1/it active IP Right Grant
- 1996-10-02 DE DE19640838A patent/DE19640838B4/de not_active Expired - Fee Related
- 1996-10-02 FR FR9611993A patent/FR2739716B1/fr not_active Expired - Fee Related
- 1996-10-04 GB GB9620678A patent/GB2306070B/en not_active Expired - Fee Related
- 1996-10-04 JP JP8264338A patent/JPH09120557A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| GB2306070B (en) | 2000-02-02 |
| KR970023016A (ko) | 1997-05-30 |
| GB2306070A (en) | 1997-04-23 |
| ITMI961993A1 (it) | 1998-03-27 |
| JPH09120557A (ja) | 1997-05-06 |
| FR2739716B1 (fr) | 1999-01-08 |
| DE19640838A1 (de) | 1997-04-10 |
| DE19640838B4 (de) | 2010-10-28 |
| US5802037A (en) | 1998-09-01 |
| KR100200857B1 (ko) | 1999-06-15 |
| GB9620678D0 (en) | 1996-11-20 |
| NL1004078C2 (nl) | 1998-01-07 |
| NL1004078A1 (nl) | 1997-04-08 |
| FR2739716A1 (fr) | 1997-04-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 0001 | Granted |