JPS63176924U - - Google Patents
Info
- Publication number
- JPS63176924U JPS63176924U JP445787U JP445787U JPS63176924U JP S63176924 U JPS63176924 U JP S63176924U JP 445787 U JP445787 U JP 445787U JP 445787 U JP445787 U JP 445787U JP S63176924 U JPS63176924 U JP S63176924U
- Authority
- JP
- Japan
- Prior art keywords
- disk
- focus servo
- signal
- focus
- optical disc
- 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
- 238000001514 detection method Methods 0.000 claims description 7
- 230000007547 defect Effects 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 claims description 4
- 230000005764 inhibitory process Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- 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 |
---|---|---|---|
JP445787U JPH0528571Y2 (zh) | 1987-01-16 | 1987-01-16 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP445787U JPH0528571Y2 (zh) | 1987-01-16 | 1987-01-16 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS63176924U true JPS63176924U (zh) | 1988-11-16 |
JPH0528571Y2 JPH0528571Y2 (zh) | 1993-07-22 |
Family
ID=30785137
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP445787U Expired - Lifetime JPH0528571Y2 (zh) | 1987-01-16 | 1987-01-16 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0528571Y2 (zh) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0284116U (zh) * | 1988-12-16 | 1990-06-29 | ||
JPH0312825A (ja) * | 1989-06-09 | 1991-01-21 | Onkyo Corp | 合焦装置および方法 |
-
1987
- 1987-01-16 JP JP445787U patent/JPH0528571Y2/ja not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0284116U (zh) * | 1988-12-16 | 1990-06-29 | ||
JPH0312825A (ja) * | 1989-06-09 | 1991-01-21 | Onkyo Corp | 合焦装置および方法 |
Also Published As
Publication number | Publication date |
---|---|
JPH0528571Y2 (zh) | 1993-07-22 |
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