JPS6114575B2 - - Google Patents
Info
- Publication number
- JPS6114575B2 JPS6114575B2 JP4487677A JP4487677A JPS6114575B2 JP S6114575 B2 JPS6114575 B2 JP S6114575B2 JP 4487677 A JP4487677 A JP 4487677A JP 4487677 A JP4487677 A JP 4487677A JP S6114575 B2 JPS6114575 B2 JP S6114575B2
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- signal
- light beam
- focus control
- detection means
- 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
Links
- 238000001514 detection method Methods 0.000 claims description 29
- 230000003287 optical effect Effects 0.000 description 17
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000012790 confirmation Methods 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Landscapes
- Automatic Focus Adjustment (AREA)
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Optical Recording Or Reproduction (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4487677A JPS53129604A (en) | 1977-04-18 | 1977-04-18 | Optical recorder-reproducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4487677A JPS53129604A (en) | 1977-04-18 | 1977-04-18 | Optical recorder-reproducer |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59057862A Division JPS59223960A (ja) | 1984-03-26 | 1984-03-26 | 光学式記録媒体 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS53129604A JPS53129604A (en) | 1978-11-11 |
| JPS6114575B2 true JPS6114575B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1986-04-19 |
Family
ID=12703685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4487677A Granted JPS53129604A (en) | 1977-04-18 | 1977-04-18 | Optical recorder-reproducer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS53129604A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5637832A (en) * | 1979-09-04 | 1981-04-11 | Matsushita Electric Ind Co Ltd | Focus control setting method of optical record |
| JPS59223960A (ja) * | 1984-03-26 | 1984-12-15 | Matsushita Electric Ind Co Ltd | 光学式記録媒体 |
| JPS61130025U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1985-01-29 | 1986-08-14 | ||
| JPH0721868B2 (ja) * | 1989-08-04 | 1995-03-08 | キヤノン株式会社 | 光情報処理装置 |
-
1977
- 1977-04-18 JP JP4487677A patent/JPS53129604A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS53129604A (en) | 1978-11-11 |