JPS6045947A - 光デイスクヘツドのフオ−カスずれ検出装置 - Google Patents
光デイスクヘツドのフオ−カスずれ検出装置Info
- Publication number
- JPS6045947A JPS6045947A JP15433383A JP15433383A JPS6045947A JP S6045947 A JPS6045947 A JP S6045947A JP 15433383 A JP15433383 A JP 15433383A JP 15433383 A JP15433383 A JP 15433383A JP S6045947 A JPS6045947 A JP S6045947A
- Authority
- JP
- Japan
- Prior art keywords
- photodetector
- light
- recording medium
- reflected light
- objective lens
- 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
- G11B7/085—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
Landscapes
- Optical Recording Or Reproduction (AREA)
- Automatic Focus Adjustment (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15433383A JPS6045947A (ja) | 1983-08-24 | 1983-08-24 | 光デイスクヘツドのフオ−カスずれ検出装置 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15433383A JPS6045947A (ja) | 1983-08-24 | 1983-08-24 | 光デイスクヘツドのフオ−カスずれ検出装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6045947A true JPS6045947A (ja) | 1985-03-12 |
| JPS6412016B2 JPS6412016B2 (en]) | 1989-02-28 |
Family
ID=15581853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15433383A Granted JPS6045947A (ja) | 1983-08-24 | 1983-08-24 | 光デイスクヘツドのフオ−カスずれ検出装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6045947A (en]) |
-
1983
- 1983-08-24 JP JP15433383A patent/JPS6045947A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6412016B2 (en]) | 1989-02-28 |
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