JPS5532246A - Optical recorder and reproducing device - Google Patents

Optical recorder and reproducing device

Info

Publication number
JPS5532246A
JPS5532246A JP10407778A JP10407778A JPS5532246A JP S5532246 A JPS5532246 A JP S5532246A JP 10407778 A JP10407778 A JP 10407778A JP 10407778 A JP10407778 A JP 10407778A JP S5532246 A JPS5532246 A JP S5532246A
Authority
JP
Japan
Prior art keywords
recording
disc
light
reproducing
reference voltage
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
JP10407778A
Other languages
Japanese (ja)
Other versions
JPS6211410B2 (en
Inventor
Tomio Yoshida
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 JP10407778A priority Critical patent/JPS5532246A/en
Publication of JPS5532246A publication Critical patent/JPS5532246A/en
Publication of JPS6211410B2 publication Critical patent/JPS6211410B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE: To monitor recording contents by slight light immediately after recording, by recording a still picture on a disc by setting a high level for recording and a low level for reproducing to a servo system which controls irradiation light from one laser light source.
CONSTITUTION: The output light of laser unit 1 is led to light modulator 2, where it is modulated by controlling its intensity by a recording signal in recording operation. In reproducing a signal, light weak enough not to change disc 8 in quality is outputted continuously. Disc motor 9, turning disc 8 at a fixed rotational frequency, is moved in an arrow-A direction by a carrier 10 so as to form concentric recording tracks. Reference voltage setting circuit 15 changes reproducing reference voltage VP over to recording reference voltage VR or reversely so that a still picture can be recorded on the disc by one laser light source while recording contents can also be monitoted by light weak enough not to change the quality of the disc.
COPYRIGHT: (C)1980,JPO&Japio
JP10407778A 1978-08-25 1978-08-25 Optical recorder and reproducing device Granted JPS5532246A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10407778A JPS5532246A (en) 1978-08-25 1978-08-25 Optical recorder and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10407778A JPS5532246A (en) 1978-08-25 1978-08-25 Optical recorder and reproducing device

Publications (2)

Publication Number Publication Date
JPS5532246A true JPS5532246A (en) 1980-03-06
JPS6211410B2 JPS6211410B2 (en) 1987-03-12

Family

ID=14371079

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10407778A Granted JPS5532246A (en) 1978-08-25 1978-08-25 Optical recorder and reproducing device

Country Status (1)

Country Link
JP (1) JPS5532246A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60239924A (en) * 1984-05-14 1985-11-28 Hitachi Ltd Optical recording and reproducing device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4938529A (en) * 1972-08-11 1974-04-10
JPS5129821A (en) * 1974-09-06 1976-03-13 Mitsubishi Electric Corp
JPS5267303A (en) * 1975-12-01 1977-06-03 Matsushita Electric Ind Co Ltd Optical recording and reproduction device
JPS54155007A (en) * 1978-05-29 1979-12-06 Hitachi Ltd Information recorder

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4938529A (en) * 1972-08-11 1974-04-10
JPS5129821A (en) * 1974-09-06 1976-03-13 Mitsubishi Electric Corp
JPS5267303A (en) * 1975-12-01 1977-06-03 Matsushita Electric Ind Co Ltd Optical recording and reproduction device
JPS54155007A (en) * 1978-05-29 1979-12-06 Hitachi Ltd Information recorder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60239924A (en) * 1984-05-14 1985-11-28 Hitachi Ltd Optical recording and reproducing device

Also Published As

Publication number Publication date
JPS6211410B2 (en) 1987-03-12

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