JPS6427029A - Optical recording and reproducing device - Google Patents
Optical recording and reproducing deviceInfo
- Publication number
- JPS6427029A JPS6427029A JP18225687A JP18225687A JPS6427029A JP S6427029 A JPS6427029 A JP S6427029A JP 18225687 A JP18225687 A JP 18225687A JP 18225687 A JP18225687 A JP 18225687A JP S6427029 A JPS6427029 A JP S6427029A
- Authority
- JP
- Japan
- Prior art keywords
- reproduction
- error detection
- recording
- reproducing device
- split
- 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
Abstract
PURPOSE:To realize an optical recording and reproducing device being economical and excellent in its assembly property, by a simple optical system, by separating a beam for recording and a beam for reproduction reflected by an information recording medium, and executing a focusing error detection and a tracking error detection by using only the beam for the reproduction. CONSTITUTION:The beam 2 for the recording and the beam 3 for the reproduction from a 2-beam semiconductor laser 1 are led onto an information recording medium 9, and information is recorded and reproduced. A focusing error detection is executed through a 2-split photodetector 20 and a differential amplifier 27 by light-shielding completely the recording use beam 2 by a knife edge 19, and also, light-shielding half the beam 3 for the reproduction. As for a tracking error detection, the beam 3 for the reproduction is bi-sected by using a wedge prism 33, and split beam 35a, 35b are received by photodetecting surfaces 36a, 36b of a 3-split photodetector 36, and led to a differential amplifier 26, by which an output signal TS by a detection principle of a push-pull method can be obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62182256A JP2594957B2 (en) | 1987-07-23 | 1987-07-23 | Optical recording / reproducing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62182256A JP2594957B2 (en) | 1987-07-23 | 1987-07-23 | Optical recording / reproducing device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6427029A true JPS6427029A (en) | 1989-01-30 |
JP2594957B2 JP2594957B2 (en) | 1997-03-26 |
Family
ID=16115073
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62182256A Expired - Fee Related JP2594957B2 (en) | 1987-07-23 | 1987-07-23 | Optical recording / reproducing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2594957B2 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61153830A (en) * | 1984-12-27 | 1986-07-12 | Nec Corp | Optical disk device |
-
1987
- 1987-07-23 JP JP62182256A patent/JP2594957B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61153830A (en) * | 1984-12-27 | 1986-07-12 | Nec Corp | Optical disk device |
Also Published As
Publication number | Publication date |
---|---|
JP2594957B2 (en) | 1997-03-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |