JPH0439131B2 - - Google Patents
Info
- Publication number
- JPH0439131B2 JPH0439131B2 JP57165258A JP16525882A JPH0439131B2 JP H0439131 B2 JPH0439131 B2 JP H0439131B2 JP 57165258 A JP57165258 A JP 57165258A JP 16525882 A JP16525882 A JP 16525882A JP H0439131 B2 JPH0439131 B2 JP H0439131B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- light beam
- optical
- focus
- optical fiber
- 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
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
- G11B7/12—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
- G11B7/1372—Lenses
-
- 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
- G11B7/0912—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 push-pull method
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Recording Or Reproduction (AREA)
- Automatic Focus Adjustment (AREA)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57165258A JPS5954046A (ja) | 1982-09-22 | 1982-09-22 | 焦点検出装置 |
| US06/533,440 US4626679A (en) | 1982-09-22 | 1983-09-19 | Optical head and method of detecting the focus thereof |
| DE3334120A DE3334120C2 (de) | 1982-09-22 | 1983-09-21 | Optischer Kopf, insbesondere zur Fokusermittlung in einer optischen Aufzeichnungs-/Wiedergabevorrichtung |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57165258A JPS5954046A (ja) | 1982-09-22 | 1982-09-22 | 焦点検出装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5954046A JPS5954046A (ja) | 1984-03-28 |
| JPH0439131B2 true JPH0439131B2 (enrdf_load_stackoverflow) | 1992-06-26 |
Family
ID=15808898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57165258A Granted JPS5954046A (ja) | 1982-09-22 | 1982-09-22 | 焦点検出装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5954046A (enrdf_load_stackoverflow) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100607947B1 (ko) * | 1999-11-25 | 2006-08-03 | 삼성전자주식회사 | 기록재생용 광헤드 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5339123B2 (enrdf_load_stackoverflow) * | 1973-12-28 | 1978-10-19 | ||
| JPS56165936A (en) * | 1980-05-22 | 1981-12-19 | Sharp Corp | Optical information reproducer |
-
1982
- 1982-09-22 JP JP57165258A patent/JPS5954046A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5954046A (ja) | 1984-03-28 |