JPS5680834A - Optical information reader - Google Patents

Optical information reader

Info

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
Application number
JP15627579A
Other languages
English (en)
Inventor
Hironoshin Mori
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Seiko Instruments Inc filed Critical Seiko Instruments Inc
Priority to JP15627579A priority Critical patent/JPS5680834A/ja
Publication of JPS5680834A publication Critical patent/JPS5680834A/ja
Pending legal-status Critical Current

Links

Landscapes

  • Optical Recording Or Reproduction (AREA)
JP15627579A 1979-11-30 1979-11-30 Optical information reader Pending JPS5680834A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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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