JPS6472336A - Optical pickup device - Google Patents
Optical pickup deviceInfo
- Publication number
- JPS6472336A JPS6472336A JP62229990A JP22999087A JPS6472336A JP S6472336 A JPS6472336 A JP S6472336A JP 62229990 A JP62229990 A JP 62229990A JP 22999087 A JP22999087 A JP 22999087A JP S6472336 A JPS6472336 A JP S6472336A
- Authority
- JP
- Japan
- Prior art keywords
- optical axis
- light emitting
- emitting point
- reproducing characteristic
- 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.)
- Pending
Links
Landscapes
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
Abstract
PURPOSE:To improve a virtual axial outside reproducing characteristic without improving an axial outside reproducing characteristic of a lens itself, by constituting the titled device so that a light emitting point of a light radiating means is selected in response to a shift between an optical axis of the device and an optical axis of an objective lens, and a light beam is made incident vertically on the surface of the objective lens. CONSTITUTION:A semiconductor laser 1 has, for instance, plural light emitting points, and in accordance with a tracking shift, an optimum light emitting point is selected. Therefore, by inputting a tracking error signal to an optical axis shift signal generating circuit 12 and detecting a DC component of the tracking error signal, an optical axis shift signal is generated, and by applying this optical axis shift signal to a light emitting point selecting circuit 13, only an optimum light emitting point is driven selectively. In such a way, even if an axial outside reproducing characteristic of the objective lens itself is not so good, a satisfactory reproducing characteristic can be obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62229990A JPS6472336A (en) | 1987-09-14 | 1987-09-14 | Optical pickup device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62229990A JPS6472336A (en) | 1987-09-14 | 1987-09-14 | Optical pickup device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6472336A true JPS6472336A (en) | 1989-03-17 |
Family
ID=16900873
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62229990A Pending JPS6472336A (en) | 1987-09-14 | 1987-09-14 | Optical pickup device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6472336A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04362537A (en) * | 1991-06-07 | 1992-12-15 | Rohm Co Ltd | Optical pickup device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5198046A (en) * | 1975-02-26 | 1976-08-28 |
-
1987
- 1987-09-14 JP JP62229990A patent/JPS6472336A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5198046A (en) * | 1975-02-26 | 1976-08-28 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04362537A (en) * | 1991-06-07 | 1992-12-15 | Rohm Co Ltd | Optical pickup device |
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