JPS5680834A - Optical information reader - Google Patents
Optical information readerInfo
- Publication number
- JPS5680834A JPS5680834A JP15627579A JP15627579A JPS5680834A JP S5680834 A JPS5680834 A JP S5680834A JP 15627579 A JP15627579 A JP 15627579A JP 15627579 A JP15627579 A JP 15627579A JP S5680834 A JPS5680834 A JP S5680834A
- Authority
- JP
- Japan
- Prior art keywords
- focusing
- tracking
- electromagnets
- constitution
- current
- 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
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15627579A JPS5680834A (en) | 1979-11-30 | 1979-11-30 | Optical information reader |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15627579A JPS5680834A (en) | 1979-11-30 | 1979-11-30 | Optical information reader |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5680834A true JPS5680834A (en) | 1981-07-02 |
Family
ID=15624241
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15627579A Pending JPS5680834A (en) | 1979-11-30 | 1979-11-30 | Optical information reader |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5680834A (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4561081A (en) * | 1981-07-10 | 1985-12-24 | U.S. Philips Corporation | Opto-electronic apparatus for inscribing and/or reading recording tracks by means of a radiation beam |
US4571715A (en) * | 1982-02-22 | 1986-02-18 | Nippon Telegraph & Telephone Public Corporation | Optical head movable in a tracking direction |
US4866690A (en) * | 1985-07-19 | 1989-09-12 | Yamaha Corporation | Vibration imparted focus search devices in an optical type disc playback device |
-
1979
- 1979-11-30 JP JP15627579A patent/JPS5680834A/ja active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4561081A (en) * | 1981-07-10 | 1985-12-24 | U.S. Philips Corporation | Opto-electronic apparatus for inscribing and/or reading recording tracks by means of a radiation beam |
US4571715A (en) * | 1982-02-22 | 1986-02-18 | Nippon Telegraph & Telephone Public Corporation | Optical head movable in a tracking direction |
US4866690A (en) * | 1985-07-19 | 1989-09-12 | Yamaha Corporation | Vibration imparted focus search devices in an optical type disc playback device |
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