JPS53112705A - Optical system information reproducer - Google Patents

Optical system information reproducer

Info

Publication number
JPS53112705A
JPS53112705A JP2821877A JP2821877A JPS53112705A JP S53112705 A JPS53112705 A JP S53112705A JP 2821877 A JP2821877 A JP 2821877A JP 2821877 A JP2821877 A JP 2821877A JP S53112705 A JPS53112705 A JP S53112705A
Authority
JP
Japan
Prior art keywords
optical system
system information
information reproducer
reproducer
applying
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
JP2821877A
Other languages
Japanese (ja)
Inventor
Mitsushige Kondo
Kenjiro Kime
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2821877A priority Critical patent/JPS53112705A/en
Publication of JPS53112705A publication Critical patent/JPS53112705A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To perform signal detection and out-of-focus detection simultaneously by a main beam by applying the differential signal of two photo detectors to a moving device and controlling the distance between a recording carrier and a condenser lens.
COPYRIGHT: (C)1978,JPO&Japio
JP2821877A 1977-03-14 1977-03-14 Optical system information reproducer Pending JPS53112705A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2821877A JPS53112705A (en) 1977-03-14 1977-03-14 Optical system information reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2821877A JPS53112705A (en) 1977-03-14 1977-03-14 Optical system information reproducer

Publications (1)

Publication Number Publication Date
JPS53112705A true JPS53112705A (en) 1978-10-02

Family

ID=12242478

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2821877A Pending JPS53112705A (en) 1977-03-14 1977-03-14 Optical system information reproducer

Country Status (1)

Country Link
JP (1) JPS53112705A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58209722A (en) * 1982-05-31 1983-12-06 Olympus Optical Co Ltd Detecting and setting device of focusing
JPS58211108A (en) * 1982-06-02 1983-12-08 Olympus Optical Co Ltd Focusing detector and setter for endoscope
JPS59162514A (en) * 1983-03-08 1984-09-13 Dainippon Screen Mfg Co Ltd Focus adjusting method of image scanning and recording device
JPS60217535A (en) * 1984-04-11 1985-10-31 Sony Corp Focus detector
JPS61195521U (en) * 1985-05-29 1986-12-05
JPS63298720A (en) * 1987-05-28 1988-12-06 Matsushita Electric Ind Co Ltd Focus controller
JPH0278025A (en) * 1988-09-14 1990-03-19 Copal Co Ltd Optical pickup device
JPH0836762A (en) * 1995-03-17 1996-02-06 Hitachi Ltd Optical disk apparatus

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58209722A (en) * 1982-05-31 1983-12-06 Olympus Optical Co Ltd Detecting and setting device of focusing
JPS58211108A (en) * 1982-06-02 1983-12-08 Olympus Optical Co Ltd Focusing detector and setter for endoscope
JPS59162514A (en) * 1983-03-08 1984-09-13 Dainippon Screen Mfg Co Ltd Focus adjusting method of image scanning and recording device
JPS60217535A (en) * 1984-04-11 1985-10-31 Sony Corp Focus detector
JPH0534732B2 (en) * 1984-04-11 1993-05-24 Sony Corp
JPS61195521U (en) * 1985-05-29 1986-12-05
JPS63298720A (en) * 1987-05-28 1988-12-06 Matsushita Electric Ind Co Ltd Focus controller
JPH0278025A (en) * 1988-09-14 1990-03-19 Copal Co Ltd Optical pickup device
JPH0836762A (en) * 1995-03-17 1996-02-06 Hitachi Ltd Optical disk apparatus
JP2685015B2 (en) * 1995-03-17 1997-12-03 株式会社日立製作所 Optical disk drive

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