JPS6488931A - Servo optical pick-up device - Google Patents
Servo optical pick-up deviceInfo
- Publication number
- JPS6488931A JPS6488931A JP24544087A JP24544087A JPS6488931A JP S6488931 A JPS6488931 A JP S6488931A JP 24544087 A JP24544087 A JP 24544087A JP 24544087 A JP24544087 A JP 24544087A JP S6488931 A JPS6488931 A JP S6488931A
- Authority
- JP
- Japan
- Prior art keywords
- disk
- photodetector
- laser beam
- optical pick
- projected
- 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.)
- Pending
Links
Abstract
PURPOSE:To correctly apply tilt control to an optical pick-up by using a photodetector to obtain a focus error signal to obtain the angle information of a disk surface and the light projected on it. CONSTITUTION:An optical pick-up 31 is freely movably provided in the radius direction of a disk 30. A pick-up 31 has a laser light detecting device 311 and a laser beam is projected through a radial mirror 312 and an objective lens 313 to the disk 30. The laser beam reflected from the disk 30 is made incident on a photodetector 314 having a light receiving element divided into four. The output of the photodetector 314 is supplied to a differential amplifier 314, a focus error signal is obtained, and the angle information of the laser beam supplied to a differential amplifier 316 and projected on the disk surface is obtained. By using the output of the amplifier 316, a voice coil 35 is driven and the inclination of the mirror 312 is controlled. Thus, the correct tilt control can be executed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24544087A JPS6488931A (en) | 1987-09-29 | 1987-09-29 | Servo optical pick-up device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24544087A JPS6488931A (en) | 1987-09-29 | 1987-09-29 | Servo optical pick-up device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6488931A true JPS6488931A (en) | 1989-04-03 |
Family
ID=17133694
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP24544087A Pending JPS6488931A (en) | 1987-09-29 | 1987-09-29 | Servo optical pick-up device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6488931A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0468613A2 (en) * | 1990-07-19 | 1992-01-29 | Pioneer Electronic Corporation | Optical disk player |
US7366069B2 (en) | 2003-12-04 | 2008-04-29 | Mediatek Inc. | Auto-adjusting system for an optical incident angle |
US7457218B2 (en) | 2003-11-27 | 2008-11-25 | Nec Corporation | Data reproducing method using tilt adjustment and data reproducing apparatus for the same |
-
1987
- 1987-09-29 JP JP24544087A patent/JPS6488931A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0468613A2 (en) * | 1990-07-19 | 1992-01-29 | Pioneer Electronic Corporation | Optical disk player |
US5206848A (en) * | 1990-07-19 | 1993-04-27 | Pioneer Electronic Corporation | Optical disk player having tilt servo control absent tilt sensor |
US7457218B2 (en) | 2003-11-27 | 2008-11-25 | Nec Corporation | Data reproducing method using tilt adjustment and data reproducing apparatus for the same |
US7366069B2 (en) | 2003-12-04 | 2008-04-29 | Mediatek Inc. | Auto-adjusting system for an optical incident angle |
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