JPS5267303A - Optical recording and reproduction device - Google Patents

Optical recording and reproduction device

Info

Publication number
JPS5267303A
JPS5267303A JP50143636A JP14363675A JPS5267303A JP S5267303 A JPS5267303 A JP S5267303A JP 50143636 A JP50143636 A JP 50143636A JP 14363675 A JP14363675 A JP 14363675A JP S5267303 A JPS5267303 A JP S5267303A
Authority
JP
Japan
Prior art keywords
optical recording
reproduction device
recording
false
recording materials
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
JP50143636A
Other languages
Japanese (ja)
Other versions
JPS5922292B2 (en
Inventor
Tomio Yoshida
Akifumi Nakada
Shiro Tsuji
Hideo Okamura
Yasuhisa Fukushima
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP50143636A priority Critical patent/JPS5922292B2/en
Publication of JPS5267303A publication Critical patent/JPS5267303A/en
Publication of JPS5922292B2 publication Critical patent/JPS5922292B2/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)

Abstract

PURPOSE:To prevent uninternational false recording and false erasing by feeding light of the intensity conforming to the operation modes such as recording and reproducing and detecting the rotating speed of recording materials thereby controlling the light radiation to the recording materials.
JP50143636A 1975-12-01 1975-12-01 Kogaku Tekikiki Rokusai Seisouchi Expired JPS5922292B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP50143636A JPS5922292B2 (en) 1975-12-01 1975-12-01 Kogaku Tekikiki Rokusai Seisouchi

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50143636A JPS5922292B2 (en) 1975-12-01 1975-12-01 Kogaku Tekikiki Rokusai Seisouchi

Publications (2)

Publication Number Publication Date
JPS5267303A true JPS5267303A (en) 1977-06-03
JPS5922292B2 JPS5922292B2 (en) 1984-05-25

Family

ID=15343358

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50143636A Expired JPS5922292B2 (en) 1975-12-01 1975-12-01 Kogaku Tekikiki Rokusai Seisouchi

Country Status (1)

Country Link
JP (1) JPS5922292B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5532246A (en) * 1978-08-25 1980-03-06 Matsushita Electric Ind Co Ltd Optical recorder and reproducing device
JPS61194650A (en) * 1985-02-22 1986-08-29 Matsushita Electric Ind Co Ltd Optical information recording device
JPS61253651A (en) * 1985-05-07 1986-11-11 Hitachi Ltd Recording power detecting system for optical disk device
US4908815A (en) * 1988-02-22 1990-03-13 Gregg David P Optical recording system utilizing proportional real-time feedback control of recording beam intensity
US4912697A (en) * 1984-12-29 1990-03-27 Canon Kabushiki Kaisha Apparatus and method for preventing recording errors due to a reduction in the relative speed between an information carrying light beam and a recording medium
US5126993A (en) * 1988-09-30 1992-06-30 Kabushiki Kaisha Toshiba Optical data recording/reproducing apparatus including device for preventing erroneous light emission

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5532246A (en) * 1978-08-25 1980-03-06 Matsushita Electric Ind Co Ltd Optical recorder and reproducing device
JPS6211410B2 (en) * 1978-08-25 1987-03-12 Matsushita Electric Ind Co Ltd
US4912697A (en) * 1984-12-29 1990-03-27 Canon Kabushiki Kaisha Apparatus and method for preventing recording errors due to a reduction in the relative speed between an information carrying light beam and a recording medium
JPS61194650A (en) * 1985-02-22 1986-08-29 Matsushita Electric Ind Co Ltd Optical information recording device
JPS61253651A (en) * 1985-05-07 1986-11-11 Hitachi Ltd Recording power detecting system for optical disk device
US4908815A (en) * 1988-02-22 1990-03-13 Gregg David P Optical recording system utilizing proportional real-time feedback control of recording beam intensity
US5126993A (en) * 1988-09-30 1992-06-30 Kabushiki Kaisha Toshiba Optical data recording/reproducing apparatus including device for preventing erroneous light emission

Also Published As

Publication number Publication date
JPS5922292B2 (en) 1984-05-25

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