JPS6050730A - 焦点ぼけ検出装置 - Google Patents
焦点ぼけ検出装置Info
- Publication number
- JPS6050730A JPS6050730A JP15927183A JP15927183A JPS6050730A JP S6050730 A JPS6050730 A JP S6050730A JP 15927183 A JP15927183 A JP 15927183A JP 15927183 A JP15927183 A JP 15927183A JP S6050730 A JPS6050730 A JP S6050730A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- objective lens
- light
- focus
- photodetector
- 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.)
- Granted
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
- G11B7/09—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
Landscapes
- Automatic Focus Adjustment (AREA)
- Optical Recording Or Reproduction (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15927183A JPS6050730A (ja) | 1983-08-31 | 1983-08-31 | 焦点ぼけ検出装置 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15927183A JPS6050730A (ja) | 1983-08-31 | 1983-08-31 | 焦点ぼけ検出装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6050730A true JPS6050730A (ja) | 1985-03-20 |
| JPH0339338B2 JPH0339338B2 (enrdf_load_stackoverflow) | 1991-06-13 |
Family
ID=15690125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15927183A Granted JPS6050730A (ja) | 1983-08-31 | 1983-08-31 | 焦点ぼけ検出装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6050730A (enrdf_load_stackoverflow) |
-
1983
- 1983-08-31 JP JP15927183A patent/JPS6050730A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0339338B2 (enrdf_load_stackoverflow) | 1991-06-13 |
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