JPS5644129A - Optical recording and reproducing device - Google Patents

Optical recording and reproducing device

Info

Publication number
JPS5644129A
JPS5644129A JP11939679A JP11939679A JPS5644129A JP S5644129 A JPS5644129 A JP S5644129A JP 11939679 A JP11939679 A JP 11939679A JP 11939679 A JP11939679 A JP 11939679A JP S5644129 A JPS5644129 A JP S5644129A
Authority
JP
Japan
Prior art keywords
light beam
beam splitter
reproducing device
laser generator
optical recording
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
JP11939679A
Other languages
Japanese (ja)
Inventor
Yoshidai Kitaoka
Masahiro Takasago
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP11939679A priority Critical patent/JPS5644129A/en
Publication of JPS5644129A publication Critical patent/JPS5644129A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
    • H01S3/131—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the active medium, e.g. by controlling the processes or apparatus for excitation

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)

Abstract

PURPOSE:To nearly equalize the output of a laser generator to an aimed criterion at any time and also to make it constant, by using a half-mirror, etc., as a beam splitter. CONSTITUTION:This is an optical recording and reproducing device that provides recording or reproduction on an optically recordable and reproducible disk with laser line. This is equipped with laser generator 5, beam splitter 9 made up of a half-mirror that can transmit light beam 11 from generator 5 through it and also reflect it on both surfaces, photodetector 6 that can detect light beam 12 from one reflecting surface of beam splitter 9, compensating circuit 7 that generates a signal according to the output signal of this detector 6, and electric power supplier 8, exercising control over the light beam intensity of laser generator 5.
JP11939679A 1979-09-19 1979-09-19 Optical recording and reproducing device Pending JPS5644129A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11939679A JPS5644129A (en) 1979-09-19 1979-09-19 Optical recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11939679A JPS5644129A (en) 1979-09-19 1979-09-19 Optical recording and reproducing device

Publications (1)

Publication Number Publication Date
JPS5644129A true JPS5644129A (en) 1981-04-23

Family

ID=14760454

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11939679A Pending JPS5644129A (en) 1979-09-19 1979-09-19 Optical recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS5644129A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57200953A (en) * 1981-06-02 1982-12-09 Toshiba Corp Optical record carrier reader
JPS5928829U (en) * 1982-08-14 1984-02-22 ソニー株式会社 optical pickup device
EP0156058A2 (en) * 1983-08-06 1985-10-02 Brother Kogyo Kabushiki Kaisha Magneto-optical reading apparatus
JPS61187135A (en) * 1985-02-15 1986-08-20 Mitsubishi Electric Corp Optical device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5129821A (en) * 1974-09-06 1976-03-13 Mitsubishi Electric Corp

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5129821A (en) * 1974-09-06 1976-03-13 Mitsubishi Electric Corp

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57200953A (en) * 1981-06-02 1982-12-09 Toshiba Corp Optical record carrier reader
JPS6226098B2 (en) * 1981-06-02 1987-06-06 Tokyo Shibaura Electric Co
JPS5928829U (en) * 1982-08-14 1984-02-22 ソニー株式会社 optical pickup device
EP0156058A2 (en) * 1983-08-06 1985-10-02 Brother Kogyo Kabushiki Kaisha Magneto-optical reading apparatus
US5007021A (en) * 1983-08-06 1991-04-09 Brother Kogyo Kabushiki Kaisha Magneto-optical data reading apparatus
JPS61187135A (en) * 1985-02-15 1986-08-20 Mitsubishi Electric Corp Optical device

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