JPH01243252A - Medium and method for recording optical information - Google Patents

Medium and method for recording optical information

Info

Publication number
JPH01243252A
JPH01243252A JP6907988A JP6907988A JPH01243252A JP H01243252 A JPH01243252 A JP H01243252A JP 6907988 A JP6907988 A JP 6907988A JP 6907988 A JP6907988 A JP 6907988A JP H01243252 A JPH01243252 A JP H01243252A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
groove
formed
parts
plane
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.)
Granted
Application number
JP6907988A
Inventor
Michiharu Abe
Original Assignee
Ricoh 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

Links

Abstract

PURPOSE: To improve sensitivity and recording quality by forming a groove on the plane on one side of a transparent substrate, constituting a part on which the groove is formed of a thermosoftening member, forming a light absorptive reflection layer on the plane where the groove of the substrate is formed, and setting a prescribed ratio of a reflecting level for a laser beam projecting the depth and the width of the groove at the part where the groove is formed to the part where no groove is formed.
CONSTITUTION: Groove parts 7a, 7b, 7c... are formed on the plane on one side of an optical information recording medium 1, and the transparent substrate 2 in which the parts where the groove parts 7a, 7b, 7c... are formed are constituted of the thermosoftening member is used. On the plane where the groove parts 7a, 7b, 7c... are formed, the light absorptive reflection layer 3 and a protective layer 4 are formed sequentially. The depth and the width of the groove parts 7a, 7b, 7c... of the recording medium 1 constituted in such way that the reflected light levels of the groove parts 7a, 7b, 7c... for a laser convergence beam projected from the substrate 2 side are set at values of 10W50% of that of the parts where no groove part 7a, 7b, 7c... are formed.
COPYRIGHT: (C)1989,JPO&Japio
JP6907988A 1988-03-23 1988-03-23 Medium and method for recording optical information Granted JPH01243252A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6907988A JPH01243252A (en) 1988-03-23 1988-03-23 Medium and method for recording optical information

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6907988A JPH01243252A (en) 1988-03-23 1988-03-23 Medium and method for recording optical information

Publications (1)

Publication Number Publication Date
JPH01243252A true true JPH01243252A (en) 1989-09-27

Family

ID=13392219

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6907988A Granted JPH01243252A (en) 1988-03-23 1988-03-23 Medium and method for recording optical information

Country Status (1)

Country Link
JP (1) JPH01243252A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5714748A (en) * 1992-10-02 1998-02-03 Goldstar Co., Ltd. Magnetic cards employing optical recording material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5714748A (en) * 1992-10-02 1998-02-03 Goldstar Co., Ltd. Magnetic cards employing optical recording material

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