FR2708778B1 - Dispositif de commande de mise au point pour un système à disque optique. - Google Patents
Dispositif de commande de mise au point pour un système à disque optique.Info
- Publication number
- FR2708778B1 FR2708778B1 FR9315727A FR9315727A FR2708778B1 FR 2708778 B1 FR2708778 B1 FR 2708778B1 FR 9315727 A FR9315727 A FR 9315727A FR 9315727 A FR9315727 A FR 9315727A FR 2708778 B1 FR2708778 B1 FR 2708778B1
- Authority
- FR
- France
- Prior art keywords
- control device
- optical disc
- focus control
- disc system
- focus
- 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
- G11B7/08—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
- G11B7/08—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
- G11B7/095—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 specially adapted for discs, e.g. for compensation of eccentricity or wobble
- G11B7/0956—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 specially adapted for discs, e.g. for compensation of eccentricity or wobble to compensate for tilt, skew, warp or inclination of the disc, i.e. maintain the optical axis at right angles to the disc
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019930015007A KR100230228B1 (ko) | 1993-07-31 | 1993-07-31 | 광디스크 시스템의 포커싱 제어장치 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2708778A1 FR2708778A1 (fr) | 1995-02-10 |
| FR2708778B1 true FR2708778B1 (fr) | 1995-09-22 |
Family
ID=19360689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9315727A Expired - Fee Related FR2708778B1 (fr) | 1993-07-31 | 1993-12-28 | Dispositif de commande de mise au point pour un système à disque optique. |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5399849A (fr) |
| JP (1) | JP2945828B2 (fr) |
| KR (1) | KR100230228B1 (fr) |
| DE (1) | DE4345016C2 (fr) |
| FR (1) | FR2708778B1 (fr) |
| GB (1) | GB2280518B (fr) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR960007894B1 (ko) * | 1993-12-24 | 1996-06-15 | 배순훈 | 디스크재생시스템에서의 포커스서보개시장치 |
| KR0156861B1 (ko) * | 1995-11-27 | 1998-12-15 | 김광호 | 하드디스크 드라이브에 있어서 서보제어 이득 자동 보상방법 |
| US5982721A (en) * | 1996-03-29 | 1999-11-09 | Cirrus Logic, Inc. | Optical disc drive comprising switching gains for forcing phase states to follow a sliding line trajectory in a servo system |
| JP3529556B2 (ja) * | 1996-07-18 | 2004-05-24 | パイオニア株式会社 | 光ピックアップにおけるコマ収差補正方法及び装置 |
| KR100563681B1 (ko) * | 1998-10-07 | 2006-06-15 | 엘지전자 주식회사 | 광디스크 장치의 자동이득 조절방법 |
| TWI223802B (en) * | 2002-08-23 | 2004-11-11 | Liteon It Corp | Method for determining an unbalanced disk in disk drive system using slewing amplitude of compact disk |
| KR100640596B1 (ko) * | 2004-11-15 | 2006-11-01 | 삼성전자주식회사 | 발진 현상을 검출할 수 있는 서보 제어기의 발진 검출장치및 방법 |
| EP1815466A2 (fr) * | 2004-11-15 | 2007-08-08 | Koninklijke Philips Electronics N.V. | Commande de l'actionneur d'un disque optique |
| KR100706468B1 (ko) * | 2004-12-17 | 2007-04-10 | 주식회사 대우일렉트로닉스 | 홀로그래픽 롬 디스크의 기준광 포커스 서보 장치 |
| KR20070097567A (ko) * | 2005-01-10 | 2007-10-04 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | 이득 조정 방법 및 광디스크 픽업의 신호이득을 조정하는장치 |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57113428A (en) * | 1980-12-29 | 1982-07-14 | Pioneer Video Corp | Focus servo device |
| JPS57186239A (en) * | 1981-05-11 | 1982-11-16 | Sony Corp | Disc reproducing device |
| US4669074A (en) * | 1982-05-19 | 1987-05-26 | Burroughs Corporation | Focusing control circuitry for an optical memory system |
| DE3480619D1 (de) * | 1983-11-09 | 1990-01-04 | Sharp Kk | Servosystem zum positionieren eines optischen strahls. |
| GB2187581B (en) * | 1985-04-10 | 1989-06-21 | Matsushita Electric Ind Co Ltd | Control circuit |
| US4701603A (en) * | 1985-10-17 | 1987-10-20 | Optical Disc Corporation | Focus control system for optical information recorder or player |
| JP2786181B2 (ja) * | 1985-12-21 | 1998-08-13 | ソニー株式会社 | 光ディスク装置 |
| JPS63129530A (ja) * | 1986-11-19 | 1988-06-01 | Matsushita Graphic Commun Syst Inc | 光デイスク装置のフオ−カスサ−ボ装置 |
| JPS63144428A (ja) * | 1986-12-05 | 1988-06-16 | Matsushita Electric Ind Co Ltd | 光デイスク記録再生装置のサ−ボ装置 |
| EP0325434B1 (fr) * | 1988-01-19 | 1994-10-12 | Fujitsu Limited | Système de contrôle d'accès aux pistes |
| JPH03263620A (ja) * | 1990-03-13 | 1991-11-25 | Pioneer Electron Corp | ディスクプレーヤのサーボ装置 |
| EP0453223B1 (fr) * | 1990-04-17 | 1997-09-10 | Canon Kabushiki Kaisha | Appareil de réglage de gain de boucle automatique |
| JP2563648B2 (ja) * | 1990-06-18 | 1996-12-11 | 松下電器産業株式会社 | 光学式記録再生装置 |
| JPH09122366A (ja) * | 1995-11-06 | 1997-05-13 | Brother Ind Ltd | 刺繍模様表示可能な縫製データ処理装置 |
-
1993
- 1993-07-31 KR KR1019930015007A patent/KR100230228B1/ko not_active IP Right Cessation
- 1993-12-23 GB GB9326319A patent/GB2280518B/en not_active Expired - Fee Related
- 1993-12-28 FR FR9315727A patent/FR2708778B1/fr not_active Expired - Fee Related
- 1993-12-29 US US08/175,278 patent/US5399849A/en not_active Expired - Lifetime
- 1993-12-30 DE DE4345016A patent/DE4345016C2/de not_active Expired - Fee Related
-
1994
- 1994-01-26 JP JP6006882A patent/JP2945828B2/ja not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| FR2708778A1 (fr) | 1995-02-10 |
| JP2945828B2 (ja) | 1999-09-06 |
| DE4345016C2 (de) | 1999-08-05 |
| US5399849A (en) | 1995-03-21 |
| GB9326319D0 (en) | 1994-02-23 |
| GB2280518B (en) | 1997-07-16 |
| GB2280518A (en) | 1995-02-01 |
| DE4345016A1 (de) | 1995-02-02 |
| JPH0757285A (ja) | 1995-03-03 |
| KR950004134A (ko) | 1995-02-17 |
| KR100230228B1 (ko) | 1999-11-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |
Effective date: 20100831 |