FR2505536B1 - - Google Patents
Info
- Publication number
- FR2505536B1 FR2505536B1 FR8208095A FR8208095A FR2505536B1 FR 2505536 B1 FR2505536 B1 FR 2505536B1 FR 8208095 A FR8208095 A FR 8208095A FR 8208095 A FR8208095 A FR 8208095A FR 2505536 B1 FR2505536 B1 FR 2505536B1
- Authority
- FR
- France
- 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
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
- G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
-
- 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
- G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
- G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head
- G11B7/08511—Methods for track change, selection or preliminary positioning by moving the head with focus pull-in only
-
- 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
- G11B7/0941—Methods and circuits for servo gain or phase compensation during operation
-
- 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
- G11B7/0901—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 track following only
- G11B7/0903—Multi-beam tracking systems
-
- 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
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56070416A JPS57186239A (en) | 1981-05-11 | 1981-05-11 | Disc reproducing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2505536A1 FR2505536A1 (fr) | 1982-11-12 |
| FR2505536B1 true FR2505536B1 (US06521211-20030218-C00004.png) | 1985-03-22 |
Family
ID=13430840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8208095A Granted FR2505536A1 (fr) | 1981-05-11 | 1982-05-10 | Appareil de lecture d'informations optiques notamment sur un disque |
Country Status (6)
Families Citing this family (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58128031A (ja) * | 1982-01-24 | 1983-07-30 | Sony Corp | デイスク再生装置 |
| US4531158A (en) * | 1982-01-27 | 1985-07-23 | Hitachi, Ltd. | Automatic focusing system for video cameras |
| EP0095766B1 (en) * | 1982-05-31 | 1986-10-22 | Hitachi, Ltd. | Servo circuit for a signal reproducing apparatus |
| JPH0677326B2 (ja) * | 1982-07-24 | 1994-09-28 | パイオニア株式会社 | 情報読取装置のフォ−カスサ−ボ装置 |
| JPS5977638A (ja) * | 1982-10-26 | 1984-05-04 | Nippon Gakki Seizo Kk | 光学式デイスク再生装置におけるフオ−カスサ−ボ制御装置 |
| JPS59116939A (ja) * | 1982-12-23 | 1984-07-06 | Olympus Optical Co Ltd | 光学式記録再生装置 |
| JPS59116942A (ja) * | 1982-12-23 | 1984-07-06 | Olympus Optical Co Ltd | オ−トフォ−カス装置 |
| JPS60261035A (ja) * | 1984-06-06 | 1985-12-24 | Matsushita Electric Ind Co Ltd | 光学式情報記録再生装置 |
| JPS61177642A (ja) * | 1985-01-31 | 1986-08-09 | Olympus Optical Co Ltd | 光学的情報記録再生装置 |
| JP2838208B2 (ja) * | 1988-03-29 | 1998-12-16 | 東レ・ダウコーニング・シリコーン株式会社 | 透明な難燃性シリコーンゴム組成物 |
| US5020045A (en) * | 1988-12-19 | 1991-05-28 | Eastman Kodak Company | Focus acquisition servo system and associated method |
| JP3072767B2 (ja) * | 1990-07-24 | 2000-08-07 | パイオニア株式会社 | 光学式ディスクプレーヤ |
| US5216562A (en) * | 1990-09-25 | 1993-06-01 | International Business Machines Corporation | Multi-beam optical recording system and method |
| JP2531847B2 (ja) * | 1990-09-27 | 1996-09-04 | インターナシヨナル・ビジネス・マシーンズ・コーポレーシヨン | 光学ディスク駆動装置 |
| KR100230228B1 (ko) * | 1993-07-31 | 1999-11-15 | 윤종용 | 광디스크 시스템의 포커싱 제어장치 |
| KR100447663B1 (ko) * | 1996-09-19 | 2004-11-08 | 엘지전자 주식회사 | Cdp포커스오프셋자동조정장치및그방법 |
| US6252835B1 (en) | 1996-09-19 | 2001-06-26 | L G Electronics Inc | Apparatus for automatically adjusting focus offset and method thereof in a disc player |
| JP2002538570A (ja) | 1999-02-22 | 2002-11-12 | シーゲイト テクノロジー エルエルシー | 再現性ランアウト・エラーの補償 |
| GB2364433A (en) | 1999-05-07 | 2002-01-23 | Seagate Technology Llc | Repeatable runout compensation using iterative learning control in a disc storage system |
| JP2003505818A (ja) | 1999-07-23 | 2003-02-12 | シーゲイト テクノロジー エルエルシー | パラメータがスケジュールされている学習アルゴリズムを使用した再現可能なランナウト補正 |
| US6952320B1 (en) | 1999-12-16 | 2005-10-04 | Seagate Technology Llc | Virtual tracks for repeatable runout compensation |
| US20020186625A1 (en) * | 2001-06-08 | 2002-12-12 | Chien-Li Hung | Method of rapidly adjusting optical drive focus error level |
| TWI283403B (en) * | 2002-02-19 | 2007-07-01 | Via Tech Inc | Focus control method and device |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2251876B1 (US06521211-20030218-C00004.png) * | 1973-11-16 | 1977-09-23 | Thomson Brandt | |
| NL7509906A (nl) * | 1975-08-21 | 1977-02-23 | Philips Nv | Inrichting voor het uitlezen van een schijfvor- mige registratiedrager. |
| FR2349191A1 (fr) * | 1976-04-23 | 1977-11-18 | Thomson Brandt | Lecteur optique de disque d'information comportant un dispositif d'acces automatique aux informations |
| SE7813460L (sv) * | 1978-03-27 | 1979-09-28 | Mca Disco Vision | Videoskivspelare |
| US4375091A (en) * | 1978-06-30 | 1983-02-22 | Discovision Associates | Method and apparatus for information retrieval from an optically readable storage medium |
| JPS5538639A (en) * | 1978-09-07 | 1980-03-18 | Pioneer Video Corp | Servo drawing-in unit for focus lens of optical information reader |
| NL7810386A (nl) * | 1978-10-17 | 1980-04-21 | Philips Nv | Optische leesinrichting voor het uitlezen van een schijfvormige registratiedrager. |
| NL7812111A (nl) * | 1978-12-13 | 1980-06-17 | Philips Nv | Inrichting voor het optisch uitlezen van een schijf- vormige registratiedrager, in het bijzonder het snel opzoeken van een gewenst programmagedeelte. |
| FR2458126A1 (fr) * | 1979-05-31 | 1980-12-26 | Thomson Brandt | Systeme de commande de changement de face lue pour un lecteur optique de support d'information et lecteur optique comportant un tel systeme |
| JPS5694528A (en) * | 1979-12-28 | 1981-07-31 | Matsushita Electric Ind Co Ltd | Drawing-in method of focus servo |
| JPS57113428A (en) * | 1980-12-29 | 1982-07-14 | Pioneer Video Corp | Focus servo device |
| US4417330A (en) * | 1981-10-15 | 1983-11-22 | Burroughs Corporation | Optical memory system providing improved focusing control |
-
1981
- 1981-05-11 JP JP56070416A patent/JPS57186239A/ja active Granted
-
1982
- 1982-05-04 US US06/374,704 patent/US4497047A/en not_active Expired - Lifetime
- 1982-05-07 GB GB8213202A patent/GB2100033B/en not_active Expired
- 1982-05-10 FR FR8208095A patent/FR2505536A1/fr active Granted
- 1982-05-11 DE DE19823217701 patent/DE3217701A1/de active Granted
- 1982-05-11 KR KR8202058A patent/KR880002326B1/ko active
Also Published As
| Publication number | Publication date |
|---|---|
| GB2100033A (en) | 1982-12-15 |
| DE3217701C2 (US06521211-20030218-C00004.png) | 1990-11-15 |
| KR880002326B1 (ko) | 1988-10-22 |
| US4497047A (en) | 1985-01-29 |
| DE3217701A1 (de) | 1982-12-02 |
| JPH0227734B2 (US06521211-20030218-C00004.png) | 1990-06-19 |
| FR2505536A1 (fr) | 1982-11-12 |
| GB2100033B (en) | 1984-09-05 |
| JPS57186239A (en) | 1982-11-16 |
