CA1196100A - Apparatus for optically reproducing an information signal recorded on a record disc - Google Patents
Apparatus for optically reproducing an information signal recorded on a record discInfo
- Publication number
- CA1196100A CA1196100A CA000419683A CA419683A CA1196100A CA 1196100 A CA1196100 A CA 1196100A CA 000419683 A CA000419683 A CA 000419683A CA 419683 A CA419683 A CA 419683A CA 1196100 A CA1196100 A CA 1196100A
- Authority
- CA
- Canada
- Prior art keywords
- signal
- response
- pulse signal
- record disc
- record
- 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
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
-
- 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
-
- 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
Landscapes
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Optical Recording Or Reproduction (AREA)
- Automatic Focus Adjustment (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9404/82 | 1982-01-24 | ||
| JP57009404A JPS58128031A (ja) | 1982-01-24 | 1982-01-24 | デイスク再生装置 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1196100A true CA1196100A (en) | 1985-10-29 |
Family
ID=11719474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000419683A Expired CA1196100A (en) | 1982-01-24 | 1983-01-18 | Apparatus for optically reproducing an information signal recorded on a record disc |
Country Status (7)
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4531158A (en) * | 1982-01-27 | 1985-07-23 | Hitachi, Ltd. | Automatic focusing system for video cameras |
| 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 |
| US4695992A (en) * | 1983-01-31 | 1987-09-22 | Canon Kabushiki Kaisha | Optical information recording-reproducing apparatus in which the relative position of a primary beam and secondary beams on recording medium is varied during recording and reproduction of information |
| JPS60258738A (ja) * | 1984-05-18 | 1985-12-20 | Olympus Optical Co Ltd | トラック検索方法 |
| DE3508525A1 (de) * | 1985-03-09 | 1986-09-11 | Thomson Brandt Gmbh | Fokus-such-einrichtung fuer beruehrungslose abtastung |
| US4764860A (en) * | 1985-06-26 | 1988-08-16 | Nippon Gakki Seizo Kabushiki Kaisha | Servo circuit for an information recording and/or reproducing apparatus |
| US4951274A (en) * | 1987-01-23 | 1990-08-21 | Nec Corporation | Magneto-optical head capable of separating beams for reading recorded information and servo information by use of one optical element |
| 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 |
| TWI283403B (en) * | 2002-02-19 | 2007-07-01 | Via Tech Inc | Focus control method and device |
| CN1310229C (zh) * | 2003-11-17 | 2007-04-11 | 威盛电子股份有限公司 | 调整光驱伺服系统的控制参数的装置及方法 |
| TWI261226B (en) * | 2004-01-20 | 2006-09-01 | Via Tech Inc | Apparatus and method of dynamic adjusting the detection window |
| TWI261240B (en) | 2004-08-17 | 2006-09-01 | Via Tech Inc | Method for determining data storage quality of optical disc |
| US20100235980A1 (en) * | 2005-09-08 | 2010-09-23 | Doug Fowkes | Bathtub cushion with silicone gel and method of using same |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7708200A (nl) * | 1976-07-28 | 1978-01-31 | Hitachi Ltd | Automatische scherpstellingsinrichting. |
| JPS54124705A (en) * | 1978-03-20 | 1979-09-27 | Teac Corp | Optical reproducer |
| JPS5694528A (en) * | 1979-12-28 | 1981-07-31 | Matsushita Electric Ind Co Ltd | Drawing-in method of focus servo |
| JPS6235149Y2 (US07943777-20110517-C00090.png) * | 1980-11-27 | 1987-09-07 | ||
| 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 |
| JPS58189842A (ja) * | 1982-04-30 | 1983-11-05 | Toshiba Corp | 光学式デジタルデイスクプレ−ヤ装置 |
| JPH0227734A (ja) * | 1988-07-15 | 1990-01-30 | Seiko Epson Corp | 半導体装置 |
-
1982
- 1982-01-24 JP JP57009404A patent/JPS58128031A/ja active Granted
-
1983
- 1983-01-18 CA CA000419683A patent/CA1196100A/en not_active Expired
- 1983-01-22 KR KR1019830000244A patent/KR910005641B1/ko not_active IP Right Cessation
- 1983-01-24 DE DE19833302240 patent/DE3302240A1/de active Granted
- 1983-01-24 GB GB08301818A patent/GB2115580B/en not_active Expired
- 1983-01-24 US US06/460,389 patent/US4512004A/en not_active Expired - Lifetime
- 1983-01-24 FR FR8301023A patent/FR2520543B1/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB2115580B (en) | 1985-06-26 |
| GB8301818D0 (en) | 1983-02-23 |
| US4512004A (en) | 1985-04-16 |
| JPH0438052B2 (US07943777-20110517-C00090.png) | 1992-06-23 |
| FR2520543B1 (fr) | 1989-07-21 |
| GB2115580A (en) | 1983-09-07 |
| DE3302240A1 (de) | 1983-07-28 |
| DE3302240C2 (US07943777-20110517-C00090.png) | 1993-04-29 |
| KR840003511A (ko) | 1984-09-08 |
| JPS58128031A (ja) | 1983-07-30 |
| KR910005641B1 (ko) | 1991-08-01 |
| FR2520543A1 (fr) | 1983-07-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEC | Expiry (correction) | ||
| MKEX | Expiry |