JPS55122240A - Optical recording and reproducing device - Google Patents

Optical recording and reproducing device

Info

Publication number
JPS55122240A
JPS55122240A JP2718179A JP2718179A JPS55122240A JP S55122240 A JPS55122240 A JP S55122240A JP 2718179 A JP2718179 A JP 2718179A JP 2718179 A JP2718179 A JP 2718179A JP S55122240 A JPS55122240 A JP S55122240A
Authority
JP
Japan
Prior art keywords
amplifier
reproducing
recording
conductive
switch
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
JP2718179A
Other languages
Japanese (ja)
Other versions
JPS6136292B2 (en
Inventor
Akira Ichinose
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 JP2718179A priority Critical patent/JPS55122240A/en
Publication of JPS55122240A publication Critical patent/JPS55122240A/en
Publication of JPS6136292B2 publication Critical patent/JPS6136292B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE: To enhance response of irradiation power by reducing the transient response delay of transmission light power from reproducing to recording and from recording to reproducing to perform stable and uniform coaxial recording and by controlling power of the reproducing light at a reproducing time.
CONSTITUTION: Laser light source 1, EO modulator 2, intermediate lens 3, tracking mirror 4, object lens 5, disc-shaped recording medium 6, disc motor 7, picture signal generator 16, FM modulator 17, high-speed switch 18, and amplifier 19 are provided. An optical power servo loop is formed by beam splitter 8, photo detector 9, pre-amplifier 10, differential amplifier 11, amplifiers 13 and 15, high-speed switch 20, capacitor 21, and voltage follower 22. Voltage follower 22 is an amplifier of gain 1, and capacitor 21 and voltage follower 22 send the output of amplifier 13 to amplifier 15 as it is when switch 20 is conductive, and they held the just preceding output of amplifier 13 when switch 20 becomes non-conductive. In switch 20, Q and R are conductive at a reproducing time, and Q and R are conductive at a recording time.
COPYRIGHT: (C)1980,JPO&Japio
JP2718179A 1979-03-07 1979-03-07 Optical recording and reproducing device Granted JPS55122240A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2718179A JPS55122240A (en) 1979-03-07 1979-03-07 Optical recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2718179A JPS55122240A (en) 1979-03-07 1979-03-07 Optical recording and reproducing device

Publications (2)

Publication Number Publication Date
JPS55122240A true JPS55122240A (en) 1980-09-19
JPS6136292B2 JPS6136292B2 (en) 1986-08-18

Family

ID=12213899

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2718179A Granted JPS55122240A (en) 1979-03-07 1979-03-07 Optical recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS55122240A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5840878A (en) * 1981-09-04 1983-03-09 Hitachi Ltd Driving method for semiconductor laser
FR2514540A1 (en) * 1981-10-08 1983-04-15 Sony Corp OPTICAL RECORDING APPARATUS
JPS58158051A (en) * 1982-03-15 1983-09-20 Toshiba Corp Controller for stabilizing output of semiconductor laser oscillator
JPS61248243A (en) * 1985-04-25 1986-11-05 Sony Corp Optical recording and reproducing device
US4742505A (en) * 1984-11-21 1988-05-03 Olympus Optical Company Limited Optical information recording and reproducing memory system
US4858219A (en) * 1984-11-20 1989-08-15 Olympus Optical Company Limited Optical information recording reproducing memory system with both power control and optical irradiation inhibiting circuit
US5699343A (en) * 1995-03-30 1997-12-16 Fujitsu Limited Disk apparatus
JPH1069664A (en) * 1997-08-01 1998-03-10 Sony Corp Laser power regulating device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4126889A1 (en) 2020-04-01 2023-02-08 Umicore AG & Co. KG Metal organic compounds

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5840878A (en) * 1981-09-04 1983-03-09 Hitachi Ltd Driving method for semiconductor laser
JPH0451893B2 (en) * 1981-09-04 1992-08-20 Hitachi Ltd
FR2514540A1 (en) * 1981-10-08 1983-04-15 Sony Corp OPTICAL RECORDING APPARATUS
JPS58158051A (en) * 1982-03-15 1983-09-20 Toshiba Corp Controller for stabilizing output of semiconductor laser oscillator
JPS6343819B2 (en) * 1982-03-15 1988-09-01 Tokyo Shibaura Electric Co
US4858219A (en) * 1984-11-20 1989-08-15 Olympus Optical Company Limited Optical information recording reproducing memory system with both power control and optical irradiation inhibiting circuit
US4742505A (en) * 1984-11-21 1988-05-03 Olympus Optical Company Limited Optical information recording and reproducing memory system
JPS61248243A (en) * 1985-04-25 1986-11-05 Sony Corp Optical recording and reproducing device
US5699343A (en) * 1995-03-30 1997-12-16 Fujitsu Limited Disk apparatus
JPH1069664A (en) * 1997-08-01 1998-03-10 Sony Corp Laser power regulating device

Also Published As

Publication number Publication date
JPS6136292B2 (en) 1986-08-18

Similar Documents

Publication Publication Date Title
ES458637A1 (en) Optical scanning device
JPS54143109A (en) Optical information device
AU538975B2 (en) Focus detector
JPS54128303A (en) Optical reproducing device of information recording medium disc
MY103405A (en) Optical pick-up
JPS55122240A (en) Optical recording and reproducing device
JPS5558832A (en) Signal recording and reproducing unit of optical type
GB1516285A (en) Record carrier with an optically readable trackwise-arranged information structure and apparatus for the read-out thereof
JPS54107311A (en) Fluctuation compensator of reproduction envelope signal in optical recorder-reproducer
JPS54133305A (en) Information recorder
JPS54103307A (en) Optical recorder-reproducer
JPS5647931A (en) Optical recording and reproducing device
JPS57179953A (en) Optical reproducing system
JPS54153006A (en) Controlling methof for drift of reproduction light power of image signal
JPS54102109A (en) Focusing method of optical recorder
JPS554724A (en) Information recording and reproducing device
JPS5443756A (en) Optically recording and reproducing apparatus
JPS56153542A (en) Stabilizer of laser light flux in optical recorder
JPS54104803A (en) Focus detector in optical recorder-reproducer
JPS6476538A (en) Optical recording and reproducing device
JPS55105830A (en) Optical recorder/reproducer
JPS5638A (en) Scanning position detector for recording and reproducing unit
JPS57167145A (en) Optical information reproducing device
JPS5517818A (en) Procedure of focus initialization setting in optical recording unit and its equipment
JPS55153136A (en) Optical reproducing device