JPS5769532A - Optical information recording and reproducing method - Google Patents

Optical information recording and reproducing method

Info

Publication number
JPS5769532A
JPS5769532A JP14381480A JP14381480A JPS5769532A JP S5769532 A JPS5769532 A JP S5769532A JP 14381480 A JP14381480 A JP 14381480A JP 14381480 A JP14381480 A JP 14381480A JP S5769532 A JPS5769532 A JP S5769532A
Authority
JP
Japan
Prior art keywords
metallic film
intensity
layer
information recording
optical information
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
JP14381480A
Other languages
Japanese (ja)
Inventor
Shigeru Arai
Nagaaki Etsuno
Yasuyuki Goto
Hironori Goto
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP14381480A priority Critical patent/JPS5769532A/en
Publication of JPS5769532A publication Critical patent/JPS5769532A/en
Pending 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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To record, reproduce, and erase information without giving a damage to a metallic film, by forming the metallic film, which reflects a beam, on a layer consisting of thermoplastic materials to control the intensity of an irradiated beam. CONSTITUTION:A high-reflexibility metallic film 6 of 3,000Angstrom consisting of Al is coated on a layer 7 which is formed on a substrate 8 and consists of thermoplastic materials such as acrylic resin. The beam of a laser beam source 1 is condensed onto a recording medium 5 by a half mirror 3 and an object lens 4. The intensity of the beam is so adjusted that information is recorded without deforming the layer 7 and damaging the metallic film 6. In case of reproducing, a weak beam is irradiated, and the reflection beam is detected through the half mirror 3 by a photodetector 2. In case of erasing, the intensity of the beam is so adjusted that the metallic film 6 is not damaged similarly.
JP14381480A 1980-10-15 1980-10-15 Optical information recording and reproducing method Pending JPS5769532A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14381480A JPS5769532A (en) 1980-10-15 1980-10-15 Optical information recording and reproducing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14381480A JPS5769532A (en) 1980-10-15 1980-10-15 Optical information recording and reproducing method

Publications (1)

Publication Number Publication Date
JPS5769532A true JPS5769532A (en) 1982-04-28

Family

ID=15347580

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14381480A Pending JPS5769532A (en) 1980-10-15 1980-10-15 Optical information recording and reproducing method

Country Status (1)

Country Link
JP (1) JPS5769532A (en)

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