JPS6423432A - Optical pickup device - Google Patents
Optical pickup deviceInfo
- Publication number
- JPS6423432A JPS6423432A JP62178713A JP17871387A JPS6423432A JP S6423432 A JPS6423432 A JP S6423432A JP 62178713 A JP62178713 A JP 62178713A JP 17871387 A JP17871387 A JP 17871387A JP S6423432 A JPS6423432 A JP S6423432A
- Authority
- JP
- Japan
- Prior art keywords
- radiated
- luminous flux
- laser
- half mirror
- 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.)
- Pending
Links
Landscapes
- Optical Head (AREA)
Abstract
PURPOSE:To detect the change in the lighted pattern and in the efficiency of the optical system due to a cause such as deterioration in the laser by comparing detected outputs of a luminous flux being the result of split by a luminous flux split means placed in an optical path between the laser and a recording medium and of a radiated luminous flux on the rear face of the laser. CONSTITUTION:A front face radiated light 11A radiated from a laser diode 11 is split into two by a half mirror 15 via a collimator lens 14 and the transmit ted luminous flux is collected on an optical disk 12 via an objective lens 16. The reflected light goes backward and is reflected in the half mirror 15 and made incident in a photodetector 17. On the other hand, the front face radiated light 11A reflected in the half mirror 15 is made incident on a monitoring photo detector 18. Moreover, the rear face radiated luminous flux 11B of the laser diode 11 is made incident on a monitoring photodetector 13. An APC 20 receives outputs from the detectors 18, 13 and compares both the outputs to control the radiated output from the laser diode 11.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62178713A JPS6423432A (en) | 1987-07-17 | 1987-07-17 | Optical pickup device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62178713A JPS6423432A (en) | 1987-07-17 | 1987-07-17 | Optical pickup device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6423432A true JPS6423432A (en) | 1989-01-26 |
Family
ID=16053262
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62178713A Pending JPS6423432A (en) | 1987-07-17 | 1987-07-17 | Optical pickup device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6423432A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7677187B2 (en) | 2006-01-27 | 2010-03-16 | Brother Kogyo Kabushiki Kaisha | Pattern generating mechanism for sewing machine |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5883342A (en) * | 1981-11-13 | 1983-05-19 | Hitachi Ltd | Laser output controller of optical information reader |
JPS60136285A (en) * | 1983-12-26 | 1985-07-19 | Toshiba Corp | Laser chip discrimination device |
-
1987
- 1987-07-17 JP JP62178713A patent/JPS6423432A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5883342A (en) * | 1981-11-13 | 1983-05-19 | Hitachi Ltd | Laser output controller of optical information reader |
JPS60136285A (en) * | 1983-12-26 | 1985-07-19 | Toshiba Corp | Laser chip discrimination device |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7677187B2 (en) | 2006-01-27 | 2010-03-16 | Brother Kogyo Kabushiki Kaisha | Pattern generating mechanism for sewing machine |
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