JPS55125545A - Optical information recorder/reproducer - Google Patents
Optical information recorder/reproducerInfo
- Publication number
- JPS55125545A JPS55125545A JP3268279A JP3268279A JPS55125545A JP S55125545 A JPS55125545 A JP S55125545A JP 3268279 A JP3268279 A JP 3268279A JP 3268279 A JP3268279 A JP 3268279A JP S55125545 A JPS55125545 A JP S55125545A
- Authority
- JP
- Japan
- Prior art keywords
- light detector
- mirror
- point
- reproducer
- movable mirror
- 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)
Abstract
PURPOSE:To make it possible to satisfactorily detect various signals such as a tracking signal, etc., by arranging a light detector at the position which in not affected by rotation of a movable mirror. CONSTITUTION:A half mirror 8 is mounted between movable mirror 2 and a condensing lens 3, and divides a reflected ray which comes from the information recording surface 4. And a point which is equivalent to an image point G' by the lense 3 is made G''', and when the mirror 2 has been rotated, a signal is detected by a light detector 7 which is mounted at the point G'''. Accordingly, a light spot of proper size which is not affected by rotation of the movable mirror 2 is formed on the light detector 7.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3268279A JPS55125545A (en) | 1979-03-20 | 1979-03-20 | Optical information recorder/reproducer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3268279A JPS55125545A (en) | 1979-03-20 | 1979-03-20 | Optical information recorder/reproducer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55125545A true JPS55125545A (en) | 1980-09-27 |
Family
ID=12365637
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3268279A Pending JPS55125545A (en) | 1979-03-20 | 1979-03-20 | Optical information recorder/reproducer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55125545A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4381557A (en) * | 1980-12-19 | 1983-04-26 | Rca Corporation | Optical focus sensor |
US4682315A (en) * | 1984-06-22 | 1987-07-21 | Fuji Photo Film Co., Ltd. | Focussing error detection device for use in optical disk type recording system |
-
1979
- 1979-03-20 JP JP3268279A patent/JPS55125545A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4381557A (en) * | 1980-12-19 | 1983-04-26 | Rca Corporation | Optical focus sensor |
US4682315A (en) * | 1984-06-22 | 1987-07-21 | Fuji Photo Film Co., Ltd. | Focussing error detection device for use in optical disk type recording system |
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