JPS6410432A - Optical information reproducing device - Google Patents
Optical information reproducing deviceInfo
- Publication number
- JPS6410432A JPS6410432A JP62165713A JP16571387A JPS6410432A JP S6410432 A JPS6410432 A JP S6410432A JP 62165713 A JP62165713 A JP 62165713A JP 16571387 A JP16571387 A JP 16571387A JP S6410432 A JPS6410432 A JP S6410432A
- Authority
- JP
- Japan
- Prior art keywords
- light
- light beam
- laser
- polarizer
- information
- 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 Head (AREA)
Abstract
PURPOSE:To improve the S/N of an information reproduction signal by inserting an attenuation means attenuating variable a light beam in an optical path of a laser beam of an optical means. CONSTITUTION:The light beam radiated from a semiconductor laser 2 passes through a polarizer 11 to form a light spot on an optical disk 1 through a diffraction grating 3, a beam split prism 4 and an objective lens 5. The reflected light of the light spot is modulated in response to the information on the disk 1, branched by the prism 4 and enters a photodetector 7. In this case, the output of the laser 2 is set so that the S/N of the light beam is maximized. On the other hand, the polarizer 11 is set so as to be tilted by an angle theta thereby allowing the output level of the detector 7 to enter a prescribed range through the adjustment. Thus, the S/N of the information reproducing signal is improved and high information reproduction capability is obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62165713A JPS6410432A (en) | 1987-07-02 | 1987-07-02 | Optical information reproducing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62165713A JPS6410432A (en) | 1987-07-02 | 1987-07-02 | Optical information reproducing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6410432A true JPS6410432A (en) | 1989-01-13 |
Family
ID=15817646
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62165713A Pending JPS6410432A (en) | 1987-07-02 | 1987-07-02 | Optical information reproducing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6410432A (en) |
-
1987
- 1987-07-02 JP JP62165713A patent/JPS6410432A/en active Pending
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