JPS52134704A - Optical recorder/reproducer unit - Google Patents

Optical recorder/reproducer unit

Info

Publication number
JPS52134704A
JPS52134704A JP5155976A JP5155976A JPS52134704A JP S52134704 A JPS52134704 A JP S52134704A JP 5155976 A JP5155976 A JP 5155976A JP 5155976 A JP5155976 A JP 5155976A JP S52134704 A JPS52134704 A JP S52134704A
Authority
JP
Japan
Prior art keywords
optical recorder
reproducer unit
reproducer
unit
control
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
JP5155976A
Other languages
Japanese (ja)
Other versions
JPS5756138B2 (en
Inventor
Yuji Tsuyukuchi
Sadanobu Kawabe
Naohiro Tomikawa
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.)
Teac Corp
Mitsubishi Electric Corp
Original Assignee
Teac Corp
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 Teac Corp, Mitsubishi Electric Corp filed Critical Teac Corp
Priority to JP5155976A priority Critical patent/JPS52134704A/en
Publication of JPS52134704A publication Critical patent/JPS52134704A/en
Publication of JPS5756138B2 publication Critical patent/JPS5756138B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE:To perform correct focus control in the control circuit of the optical system, by obtaining correct control signal after compensating the reflection factor of the disk.
JP5155976A 1976-05-06 1976-05-06 Optical recorder/reproducer unit Granted JPS52134704A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5155976A JPS52134704A (en) 1976-05-06 1976-05-06 Optical recorder/reproducer unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5155976A JPS52134704A (en) 1976-05-06 1976-05-06 Optical recorder/reproducer unit

Publications (2)

Publication Number Publication Date
JPS52134704A true JPS52134704A (en) 1977-11-11
JPS5756138B2 JPS5756138B2 (en) 1982-11-27

Family

ID=12890335

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5155976A Granted JPS52134704A (en) 1976-05-06 1976-05-06 Optical recorder/reproducer unit

Country Status (1)

Country Link
JP (1) JPS52134704A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58121142A (en) * 1982-01-13 1983-07-19 Matsushita Electric Ind Co Ltd Optical recording and reproducing device
JPS58125243A (en) * 1982-01-21 1983-07-26 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン Reader for disc-shaped recording carrier
JPS59157226U (en) * 1983-04-07 1984-10-22 三洋電機株式会社 Recording beam limiting circuit
JPS62154328A (en) * 1985-12-27 1987-07-09 Nec Corp Information recording and reproducing device
JPS63100623A (en) * 1986-11-28 1988-05-02 Matsushita Electric Ind Co Ltd Optical reproducing device
EP0294490A1 (en) * 1986-12-27 1988-12-14 Sony Corporation Optical disc discriminating device
JPH01258235A (en) * 1988-04-07 1989-10-16 Ricoh Co Ltd Optical recording and reproducing device
US5138596A (en) * 1988-07-11 1992-08-11 Canon Kabushiki Kaisha Optical information recording apparatus including means for delaying servo gain by a predetermined time
US5150345A (en) * 1987-08-12 1992-09-22 Canon Kabushiki Kaisha Optical information recording apparatus provided with means for sampling and holding a servo signal when the intensity of a light beam varies between intensity levels

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49131428A (en) * 1973-04-21 1974-12-17
JPS5143948A (en) * 1974-08-08 1976-04-15 Philips Nv

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49131428A (en) * 1973-04-21 1974-12-17
JPS5143948A (en) * 1974-08-08 1976-04-15 Philips Nv

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58121142A (en) * 1982-01-13 1983-07-19 Matsushita Electric Ind Co Ltd Optical recording and reproducing device
JPS58125243A (en) * 1982-01-21 1983-07-26 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン Reader for disc-shaped recording carrier
JPH0332143B2 (en) * 1982-01-21 1991-05-10 Fuiritsupusu Furuuiranpenfuaburiken Nv
JPH0110752Y2 (en) * 1983-04-07 1989-03-28
JPS59157226U (en) * 1983-04-07 1984-10-22 三洋電機株式会社 Recording beam limiting circuit
JPS62154328A (en) * 1985-12-27 1987-07-09 Nec Corp Information recording and reproducing device
JPH0546618B2 (en) * 1985-12-27 1993-07-14 Nippon Electric Co
JPS63100623A (en) * 1986-11-28 1988-05-02 Matsushita Electric Ind Co Ltd Optical reproducing device
JPH0234094B2 (en) * 1986-11-28 1990-08-01 Matsushita Electric Ind Co Ltd
EP0294490A1 (en) * 1986-12-27 1988-12-14 Sony Corporation Optical disc discriminating device
US5150345A (en) * 1987-08-12 1992-09-22 Canon Kabushiki Kaisha Optical information recording apparatus provided with means for sampling and holding a servo signal when the intensity of a light beam varies between intensity levels
JPH01258235A (en) * 1988-04-07 1989-10-16 Ricoh Co Ltd Optical recording and reproducing device
US5138596A (en) * 1988-07-11 1992-08-11 Canon Kabushiki Kaisha Optical information recording apparatus including means for delaying servo gain by a predetermined time

Also Published As

Publication number Publication date
JPS5756138B2 (en) 1982-11-27

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