JPS53132308A - Focus controller of optical reproducer - Google Patents

Focus controller of optical reproducer

Info

Publication number
JPS53132308A
JPS53132308A JP4704277A JP4704277A JPS53132308A JP S53132308 A JPS53132308 A JP S53132308A JP 4704277 A JP4704277 A JP 4704277A JP 4704277 A JP4704277 A JP 4704277A JP S53132308 A JPS53132308 A JP S53132308A
Authority
JP
Japan
Prior art keywords
focus controller
servo control
optical reproducer
reproducer
optical
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
JP4704277A
Other languages
Japanese (ja)
Inventor
Hitoshi Okada
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP4704277A priority Critical patent/JPS53132308A/en
Publication of JPS53132308A publication Critical patent/JPS53132308A/en
Pending legal-status Critical Current

Links

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)

Abstract

PURPOSE: To surely and sufficiently perform focus controlling by supplying search signal to a servo control circuit when the opposing distance of a recording disc and an objective lens goes out of a servo control drawing range.
COPYRIGHT: (C)1978,JPO&Japio
JP4704277A 1977-04-22 1977-04-22 Focus controller of optical reproducer Pending JPS53132308A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4704277A JPS53132308A (en) 1977-04-22 1977-04-22 Focus controller of optical reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4704277A JPS53132308A (en) 1977-04-22 1977-04-22 Focus controller of optical reproducer

Publications (1)

Publication Number Publication Date
JPS53132308A true JPS53132308A (en) 1978-11-18

Family

ID=12764101

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4704277A Pending JPS53132308A (en) 1977-04-22 1977-04-22 Focus controller of optical reproducer

Country Status (1)

Country Link
JP (1) JPS53132308A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56111136A (en) * 1980-02-01 1981-09-02 Pioneer Video Corp Protective device for reader of optical disc player
JPS57133525A (en) * 1981-02-07 1982-08-18 Olympus Optical Co Ltd Automatic focusing system of optical information reader
JPS59500884A (en) * 1982-05-19 1984-05-17 バロ−ス・コ−ポレ−ション Optical memory system with improved position and focus control circuitry
JPS59500885A (en) * 1982-05-19 1984-05-17 バロ−ス・コ−ポレ−ション Focus control circuit for optical memory system
JPS59127238A (en) * 1982-12-30 1984-07-23 Sony Corp Optical information recorder
JPH05109085A (en) * 1991-10-16 1993-04-30 Mitsubishi Electric Corp Focus controller

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56111136A (en) * 1980-02-01 1981-09-02 Pioneer Video Corp Protective device for reader of optical disc player
JPS57133525A (en) * 1981-02-07 1982-08-18 Olympus Optical Co Ltd Automatic focusing system of optical information reader
JPS59500884A (en) * 1982-05-19 1984-05-17 バロ−ス・コ−ポレ−ション Optical memory system with improved position and focus control circuitry
JPS59500885A (en) * 1982-05-19 1984-05-17 バロ−ス・コ−ポレ−ション Focus control circuit for optical memory system
JPS59127238A (en) * 1982-12-30 1984-07-23 Sony Corp Optical information recorder
JPH0438050B2 (en) * 1982-12-30 1992-06-23 Sony Corp
JPH05109085A (en) * 1991-10-16 1993-04-30 Mitsubishi Electric Corp Focus controller

Similar Documents

Publication Publication Date Title
JPS51151150A (en) Optical record reproducing reproducer in signal
JPS5280802A (en) Optical type information recording and reproduction apparatus
JPS53132308A (en) Focus controller of optical reproducer
JPS52102701A (en) Optical recording system
JPS53112705A (en) Optical system information reproducer
JPS533305A (en) Optical reproduction device
JPS5319805A (en) Automatic focusing optical device
JPS53100203A (en) Optical reproducer
JPS52134705A (en) Optical recorder/reproducer unit
JPS53110805A (en) Optical information recording/reproducing device
JPS5347803A (en) Automatic focus controller
JPS53129604A (en) Optical recorder-reproducer
JPS53147507A (en) Focus position controller
JPS5362502A (en) Optical recording-reproducing apparatus
JPS52152705A (en) Optical reproducing system
JPS5331151A (en) Automatic focusing device for microscope
JPS533201A (en) Forcus servo system for light beam
JPS53148412A (en) Optical recorder or reproducer
JPS5280803A (en) Automatic focusing device
JPS5417703A (en) Reproducer of optical type video discs
JPS5245907A (en) Automatic optical path adjusting device
JPS6466829A (en) Tracking device for optical disk device
JPS5387203A (en) Stabilizing system for rotary mirror in optical information recorder/reproducer
JPS5237404A (en) Optical recorder/player
JPS524111A (en) Optical record and reproduction system of signal