JPS5328403A - Optical information reader of disc from magnetic recording media - Google Patents
Optical information reader of disc from magnetic recording mediaInfo
- Publication number
- JPS5328403A JPS5328403A JP10220276A JP10220276A JPS5328403A JP S5328403 A JPS5328403 A JP S5328403A JP 10220276 A JP10220276 A JP 10220276A JP 10220276 A JP10220276 A JP 10220276A JP S5328403 A JPS5328403 A JP S5328403A
- Authority
- JP
- Japan
- Prior art keywords
- disc
- magnetic recording
- recording media
- optical information
- information reader
- 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
Abstract
PURPOSE: To read out information by so arranging the device that the focus deviation signal for focussing is detected by the use of photonic sensors.
COPYRIGHT: (C)1978,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10220276A JPS5328403A (en) | 1976-08-28 | 1976-08-28 | Optical information reader of disc from magnetic recording media |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10220276A JPS5328403A (en) | 1976-08-28 | 1976-08-28 | Optical information reader of disc from magnetic recording media |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5328403A true JPS5328403A (en) | 1978-03-16 |
Family
ID=14321071
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10220276A Pending JPS5328403A (en) | 1976-08-28 | 1976-08-28 | Optical information reader of disc from magnetic recording media |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5328403A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57179954A (en) * | 1981-04-27 | 1982-11-05 | Sony Corp | Optical type disc player |
JPS6431110A (en) * | 1987-07-27 | 1989-02-01 | Micro Pack Kk | Automatic focusing method for microscope |
-
1976
- 1976-08-28 JP JP10220276A patent/JPS5328403A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57179954A (en) * | 1981-04-27 | 1982-11-05 | Sony Corp | Optical type disc player |
JPH0219538B2 (en) * | 1981-04-27 | 1990-05-02 | Sony Corp | |
JPS6431110A (en) * | 1987-07-27 | 1989-02-01 | Micro Pack Kk | Automatic focusing method for microscope |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS52109954A (en) | Optical signal reader | |
JPS51151150A (en) | Optical record reproducing reproducer in signal | |
JPS5280802A (en) | Optical type information recording and reproduction apparatus | |
JPS5328403A (en) | Optical information reader of disc from magnetic recording media | |
JPS53100203A (en) | Optical reproducer | |
JPS5320904A (en) | Optical information reader | |
JPS533201A (en) | Forcus servo system for light beam | |
JPS5328404A (en) | Optical information re producer | |
JPS52152705A (en) | Optical reproducing system | |
JPS53148412A (en) | Optical recorder or reproducer | |
JPS5315105A (en) | Spacing detector of optical recorder/reproducer | |
JPS5255547A (en) | Optical information reader | |
JPS52153734A (en) | Objective lens system for optical scanning | |
JPS5362502A (en) | Optical recording-reproducing apparatus | |
JPS53149301A (en) | Optical recorder-reproducer | |
JPS5339717A (en) | Temperature compensator for magnetic disc device | |
JPS5371808A (en) | Optical information reader | |
JPS5275306A (en) | Signal recording position retrieval apparatus | |
JPS536001A (en) | Focus location detector for optical recording medium | |
JPS5280803A (en) | Automatic focusing device | |
JPS5318A (en) | Optical video disc reproduction unit | |
JPS526540A (en) | Optical recording and reproducing methods for signals | |
JPS53125816A (en) | Recording system for information recorded medium disc | |
JPS5378818A (en) | Magnetic disc system | |
JPS53149001A (en) | Reproducing system for optically recorded information |