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JPS5736439A - Information signal recorder - Google Patents

Information signal recorder

Info

Publication number
JPS5736439A
JPS5736439A JP11214880A JP11214880A JPS5736439A JP S5736439 A JPS5736439 A JP S5736439A JP 11214880 A JP11214880 A JP 11214880A JP 11214880 A JP11214880 A JP 11214880A JP S5736439 A JPS5736439 A JP S5736439A
Authority
JP
Japan
Prior art keywords
rise
fall
signal
amplitude
information signal
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
JP11214880A
Other languages
Japanese (ja)
Other versions
JPS6211411B2 (en
Inventor
Seiji Nishino
Akihiro Sakata
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 JP11214880A priority Critical patent/JPS5736439A/en
Publication of JPS5736439A publication Critical patent/JPS5736439A/en
Publication of JPS6211411B2 publication Critical patent/JPS6211411B2/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
    • 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
    • G11B7/126—Circuits, methods or arrangements for laser control or stabilisation

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To realize the recording of a high S/N, by setting the amplitude larger at the rise and fall parts of a signal to be applied to a laser beam source than that at the intermediate part. CONSTITUTION:The amplitude at the rise and fall parts of a signal to be applied to a laser beam source is formed into a rectangular wave having the larger amplitude than that at the intermediate part. The figure 12 indicates the threshold level, and the signal is recorded on a sensitive material when a beam higher than the level 12 is irradiated to the sensitive material. In this connection, the voltage to be applied is set at VO VP during the rise and the fall to obtain a sharp rise 13 and fall 14 which are higher than the level 12. Thus the S/N can be improved during recording.
JP11214880A 1980-08-13 1980-08-13 Information signal recorder Granted JPS5736439A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11214880A JPS5736439A (en) 1980-08-13 1980-08-13 Information signal recorder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11214880A JPS5736439A (en) 1980-08-13 1980-08-13 Information signal recorder

Publications (2)

Publication Number Publication Date
JPS5736439A true JPS5736439A (en) 1982-02-27
JPS6211411B2 JPS6211411B2 (en) 1987-03-12

Family

ID=14579425

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11214880A Granted JPS5736439A (en) 1980-08-13 1980-08-13 Information signal recorder

Country Status (1)

Country Link
JP (1) JPS5736439A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59227040A (en) * 1983-06-07 1984-12-20 Nec Corp Optical storage writing circuit
JPS60237641A (en) * 1984-05-11 1985-11-26 Seiko Instr & Electronics Ltd Driving device for semiconductor laser
JPS61113154A (en) * 1984-11-06 1986-05-31 Seiko Epson Corp magneto-optical recording device
JPS61216126A (en) * 1985-03-22 1986-09-25 Hitachi Ltd optical recording method
JPS63153743A (en) * 1986-07-10 1988-06-27 Hitachi Maxell Ltd Optical information recording medium and its production

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55139693A (en) * 1979-04-17 1980-10-31 Fujitsu Ltd Write system for optical recording medium

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55139693A (en) * 1979-04-17 1980-10-31 Fujitsu Ltd Write system for optical recording medium

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59227040A (en) * 1983-06-07 1984-12-20 Nec Corp Optical storage writing circuit
JPS60237641A (en) * 1984-05-11 1985-11-26 Seiko Instr & Electronics Ltd Driving device for semiconductor laser
JPS61113154A (en) * 1984-11-06 1986-05-31 Seiko Epson Corp magneto-optical recording device
JPS61216126A (en) * 1985-03-22 1986-09-25 Hitachi Ltd optical recording method
JPS63153743A (en) * 1986-07-10 1988-06-27 Hitachi Maxell Ltd Optical information recording medium and its production

Also Published As

Publication number Publication date
JPS6211411B2 (en) 1987-03-12

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