JPH0438052B2 - - Google Patents
Info
- Publication number
- JPH0438052B2 JPH0438052B2 JP57009404A JP940482A JPH0438052B2 JP H0438052 B2 JPH0438052 B2 JP H0438052B2 JP 57009404 A JP57009404 A JP 57009404A JP 940482 A JP940482 A JP 940482A JP H0438052 B2 JPH0438052 B2 JP H0438052B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- focus
- control
- track jump
- light beam
- 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 - Lifetime
Links
- 230000003213 activating effect Effects 0.000 claims 1
- 230000005534 acoustic noise Effects 0.000 description 7
- 230000003287 optical effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000001960 triggered effect Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 2
- 201000009310 astigmatism Diseases 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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)
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57009404A JPS58128031A (ja) | 1982-01-24 | 1982-01-24 | デイスク再生装置 |
| CA000419683A CA1196100A (en) | 1982-01-24 | 1983-01-18 | Apparatus for optically reproducing an information signal recorded on a record disc |
| KR1019830000244A KR910005641B1 (ko) | 1982-01-24 | 1983-01-22 | 디스크 재생장치 |
| DE19833302240 DE3302240A1 (de) | 1982-01-24 | 1983-01-24 | Einrichtung zum optischen lesen von auf einer sich drehenden aufzeichnungsplatte aufgezeichneter information |
| GB08301818A GB2115580B (en) | 1982-01-24 | 1983-01-24 | Apparatus for optically reading information recorded on a rotable record disc |
| US06/460,389 US4512004A (en) | 1982-01-24 | 1983-01-24 | Apparatus for optically reproducing an information signal recorded on a record disc |
| FR8301023A FR2520543B1 (fr) | 1982-01-24 | 1983-01-24 | Appareil de lecture optique d'un support d'enregistrement tel qu'un disque |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57009404A JPS58128031A (ja) | 1982-01-24 | 1982-01-24 | デイスク再生装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58128031A JPS58128031A (ja) | 1983-07-30 |
| JPH0438052B2 true JPH0438052B2 (US07943777-20110517-C00090.png) | 1992-06-23 |
Family
ID=11719474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57009404A Granted JPS58128031A (ja) | 1982-01-24 | 1982-01-24 | デイスク再生装置 |
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 |
| TWI296799B (en) * | 2003-11-17 | 2008-05-11 | Tian Holdings Llc | Focusing controllter and the method thereof for an optical disk drive |
| 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 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0227734A (ja) * | 1988-07-15 | 1990-01-30 | Seiko Epson Corp | 半導体装置 |
Family Cites Families (7)
| 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 |
-
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 FR FR8301023A patent/FR2520543B1/fr not_active Expired
- 1983-01-24 US US06/460,389 patent/US4512004A/en not_active Expired - Lifetime
- 1983-01-24 GB GB08301818A patent/GB2115580B/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0227734A (ja) * | 1988-07-15 | 1990-01-30 | Seiko Epson Corp | 半導体装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR840003511A (ko) | 1984-09-08 |
| KR910005641B1 (ko) | 1991-08-01 |
| CA1196100A (en) | 1985-10-29 |
| FR2520543A1 (fr) | 1983-07-29 |
| GB2115580A (en) | 1983-09-07 |
| GB2115580B (en) | 1985-06-26 |
| FR2520543B1 (fr) | 1989-07-21 |
| DE3302240C2 (US07943777-20110517-C00090.png) | 1993-04-29 |
| US4512004A (en) | 1985-04-16 |
| GB8301818D0 (en) | 1983-02-23 |
| JPS58128031A (ja) | 1983-07-30 |
| DE3302240A1 (de) | 1983-07-28 |
