JPS533201A - Forcus servo system for light beam - Google Patents

Forcus servo system for light beam

Info

Publication number
JPS533201A
JPS533201A JP7608776A JP7608776A JPS533201A JP S533201 A JPS533201 A JP S533201A JP 7608776 A JP7608776 A JP 7608776A JP 7608776 A JP7608776 A JP 7608776A JP S533201 A JPS533201 A JP S533201A
Authority
JP
Japan
Prior art keywords
pull
forcus
light beam
servo system
scope
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.)
Granted
Application number
JP7608776A
Other languages
Japanese (ja)
Other versions
JPS5827888B2 (en
Inventor
Yasuo Hachi
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.)
Victor Company of Japan Ltd
Original Assignee
Victor Company of Japan Ltd
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 Victor Company of Japan Ltd filed Critical Victor Company of Japan Ltd
Priority to JP51076087A priority Critical patent/JPS5827888B2/en
Publication of JPS533201A publication Critical patent/JPS533201A/en
Publication of JPS5827888B2 publication Critical patent/JPS5827888B2/en
Expired 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 make the pull-in action surely and broad in scope, in an apparatus which optically reproduces the information in the disc, read lens is driven in the direction opposite to the pull-in so the lens is pulled inside of the pull-in scope when it is outside of the pull-in scope of the focus detection system.
COPYRIGHT: (C)1978,JPO&Japio
JP51076087A 1976-06-29 1976-06-29 Light beam focus servo system Expired JPS5827888B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP51076087A JPS5827888B2 (en) 1976-06-29 1976-06-29 Light beam focus servo system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP51076087A JPS5827888B2 (en) 1976-06-29 1976-06-29 Light beam focus servo system

Publications (2)

Publication Number Publication Date
JPS533201A true JPS533201A (en) 1978-01-12
JPS5827888B2 JPS5827888B2 (en) 1983-06-13

Family

ID=13595036

Family Applications (1)

Application Number Title Priority Date Filing Date
JP51076087A Expired JPS5827888B2 (en) 1976-06-29 1976-06-29 Light beam focus servo system

Country Status (1)

Country Link
JP (1) JPS5827888B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5694528A (en) * 1979-12-28 1981-07-31 Matsushita Electric Ind Co Ltd Drawing-in method of focus servo
JPS57120239A (en) * 1981-01-17 1982-07-27 Sharp Corp Focus servomechanism of optical information reader
JPS6275411A (en) * 1985-09-30 1987-04-07 Mitaka Koki Kk Non-contacting automatic positioning device
JPH0329118A (en) * 1978-03-27 1991-02-07 Discovision Assoc Focus retry

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5271208A (en) * 1975-12-10 1977-06-14 Mansei Kogyo Kk Device for driving automatically focusing device of optical information reader

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5271208A (en) * 1975-12-10 1977-06-14 Mansei Kogyo Kk Device for driving automatically focusing device of optical information reader

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0329118A (en) * 1978-03-27 1991-02-07 Discovision Assoc Focus retry
JPS5694528A (en) * 1979-12-28 1981-07-31 Matsushita Electric Ind Co Ltd Drawing-in method of focus servo
JPS57120239A (en) * 1981-01-17 1982-07-27 Sharp Corp Focus servomechanism of optical information reader
JPS6275411A (en) * 1985-09-30 1987-04-07 Mitaka Koki Kk Non-contacting automatic positioning device

Also Published As

Publication number Publication date
JPS5827888B2 (en) 1983-06-13

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