JPS54124704A - Optical information reproducer - Google Patents
Optical information reproducerInfo
- Publication number
- JPS54124704A JPS54124704A JP3103578A JP3103578A JPS54124704A JP S54124704 A JPS54124704 A JP S54124704A JP 3103578 A JP3103578 A JP 3103578A JP 3103578 A JP3103578 A JP 3103578A JP S54124704 A JPS54124704 A JP S54124704A
- Authority
- JP
- Japan
- Prior art keywords
- photo
- light beam
- deflector
- detector
- 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
- Automatic Focus Adjustment (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
PURPOSE: To reduce the movement of a light beam in photo detector position by inserting a cylindrical convex lens in the optical path directing reflected light beam to the photo detector.
CONSTITUTION: The light beam from a light source 11 is magnified via photo deflector 114 which is making constant vibrations and is further radiated as a minute spot on an information disc 17 via photo deflector 14 and objective lens 15. The reflected light from the track on a disc 17 is separated with a beam splitter 13 and is received with a photo detector 19 through a cylindrical convex lens 18 which has the axis parallel to the rotaing axis of the photo deflector 114. The information signal and tracking control signal are obtained from the detector 19. Focusing of the lens 15 is accomplished by applying the focusing control signal to a driving coil 16.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3103578A JPS54124704A (en) | 1978-03-20 | 1978-03-20 | Optical information reproducer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3103578A JPS54124704A (en) | 1978-03-20 | 1978-03-20 | Optical information reproducer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54124704A true JPS54124704A (en) | 1979-09-27 |
Family
ID=12320238
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3103578A Pending JPS54124704A (en) | 1978-03-20 | 1978-03-20 | Optical information reproducer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54124704A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6142746A (en) * | 1984-08-07 | 1986-03-01 | Matsushita Electric Ind Co Ltd | Focus position controller |
-
1978
- 1978-03-20 JP JP3103578A patent/JPS54124704A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6142746A (en) * | 1984-08-07 | 1986-03-01 | Matsushita Electric Ind Co Ltd | Focus position controller |
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