JPH0621048Y2 - 光ピックアップのフォーカス制御装置 - Google Patents
光ピックアップのフォーカス制御装置Info
- Publication number
- JPH0621048Y2 JPH0621048Y2 JP15466788U JP15466788U JPH0621048Y2 JP H0621048 Y2 JPH0621048 Y2 JP H0621048Y2 JP 15466788 U JP15466788 U JP 15466788U JP 15466788 U JP15466788 U JP 15466788U JP H0621048 Y2 JPH0621048 Y2 JP H0621048Y2
- Authority
- JP
- Japan
- Prior art keywords
- focus
- error signal
- objective lens
- voltage
- focus error
- 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 - Fee Related
Links
- 230000003287 optical effect Effects 0.000 title claims description 15
- 238000001514 detection method Methods 0.000 description 12
- 238000013459 approach Methods 0.000 description 5
- 244000145845 chattering Species 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000007257 malfunction Effects 0.000 description 2
- 201000009310 astigmatism Diseases 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15466788U JPH0621048Y2 (ja) | 1988-11-28 | 1988-11-28 | 光ピックアップのフォーカス制御装置 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15466788U JPH0621048Y2 (ja) | 1988-11-28 | 1988-11-28 | 光ピックアップのフォーカス制御装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0276321U JPH0276321U (OSRAM) | 1990-06-12 |
| JPH0621048Y2 true JPH0621048Y2 (ja) | 1994-06-01 |
Family
ID=31431602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15466788U Expired - Fee Related JPH0621048Y2 (ja) | 1988-11-28 | 1988-11-28 | 光ピックアップのフォーカス制御装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0621048Y2 (OSRAM) |
-
1988
- 1988-11-28 JP JP15466788U patent/JPH0621048Y2/ja not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0276321U (OSRAM) | 1990-06-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |