JPH059850B2 - - Google Patents
Info
- Publication number
- JPH059850B2 JPH059850B2 JP62013611A JP1361187A JPH059850B2 JP H059850 B2 JPH059850 B2 JP H059850B2 JP 62013611 A JP62013611 A JP 62013611A JP 1361187 A JP1361187 A JP 1361187A JP H059850 B2 JPH059850 B2 JP H059850B2
- Authority
- JP
- Japan
- Prior art keywords
- beam spot
- objective lens
- information recording
- collimator lens
- focusing error
- 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
- 230000003287 optical effect Effects 0.000 claims description 22
- 238000001514 detection method Methods 0.000 claims description 16
- 230000004075 alteration Effects 0.000 claims description 9
- 230000004907 flux Effects 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 239000004065 semiconductor Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 229910052706 scandium Inorganic materials 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 229910052723 transition metal Inorganic materials 0.000 description 2
- 150000003624 transition metals Chemical class 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 201000009310 astigmatism Diseases 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 150000002910 rare earth metals Chemical class 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
- G11B7/09—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
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1392—Means for controlling the beam wavefront, e.g. for correction of aberration
- G11B7/13922—Means for controlling the beam wavefront, e.g. for correction of aberration passive
-
- 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
- G11B7/22—Apparatus or processes for the manufacture of optical heads, e.g. assembly
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Automatic Focus Adjustment (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62013611A JPS63183631A (ja) | 1987-01-23 | 1987-01-23 | フオ−カシングエラ−検出装置 |
| EP87306575A EP0255305B1 (en) | 1986-07-28 | 1987-07-24 | Focusing error detecting device and method of manufacturing the same |
| CA000542944A CA1319194C (en) | 1986-07-28 | 1987-07-24 | Focusing error detector and optical data detecting device incorporating the focusing error detector |
| US07/078,773 US4812638A (en) | 1986-07-28 | 1987-07-28 | Focusing error detector and optical data detecting device incorporating the focusing error detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62013611A JPS63183631A (ja) | 1987-01-23 | 1987-01-23 | フオ−カシングエラ−検出装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63183631A JPS63183631A (ja) | 1988-07-29 |
| JPH059850B2 true JPH059850B2 (enrdf_load_stackoverflow) | 1993-02-08 |
Family
ID=11838020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62013611A Granted JPS63183631A (ja) | 1986-07-28 | 1987-01-23 | フオ−カシングエラ−検出装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63183631A (enrdf_load_stackoverflow) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100551118B1 (ko) * | 1998-12-30 | 2006-05-11 | 엘지전자 주식회사 | 광픽업장치 |
-
1987
- 1987-01-23 JP JP62013611A patent/JPS63183631A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63183631A (ja) | 1988-07-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5513158A (en) | Optical disk pickup device with focusing correction by electrostriction | |
| US4644516A (en) | Optical head | |
| CA1319194C (en) | Focusing error detector and optical data detecting device incorporating the focusing error detector | |
| JPH059850B2 (enrdf_load_stackoverflow) | ||
| JPH0935304A (ja) | 光学式記録再生装置 | |
| JPH09320084A (ja) | 円盤状光記録媒体の傾き測定装置 | |
| JP3460921B2 (ja) | 光ピックアップ装置の光軸調整方法 | |
| JP2700575B2 (ja) | 光ピックアップ装置 | |
| JPS6245614B2 (enrdf_load_stackoverflow) | ||
| JP2541942B2 (ja) | 光学ヘッド移動装置 | |
| JPH0568774B2 (enrdf_load_stackoverflow) | ||
| JP2956298B2 (ja) | 光記録装置 | |
| JPH06251413A (ja) | 光ピックアップ装置 | |
| JPS6149728B2 (enrdf_load_stackoverflow) | ||
| JPS641858B2 (enrdf_load_stackoverflow) | ||
| JPS61243950A (ja) | 光学ヘツド | |
| JPH056562A (ja) | チルト検出装置 | |
| JPS62124641A (ja) | 光磁気情報記録再生装置 | |
| JPS59124041A (ja) | 焦点制御装置 | |
| JPH06274929A (ja) | 光学ヘッド装置 | |
| JPH01307025A (ja) | トラツク追従装置 | |
| JPH05234106A (ja) | 光情報記録再生ヘツド | |
| JPH0240141A (ja) | 光学式情報処理装置 | |
| JPH05234114A (ja) | 光ピックアップ | |
| JPH03266224A (ja) | 光ピックアップ |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |