JPS5724068A - Photomagnetic disk device - Google Patents

Photomagnetic disk device

Info

Publication number
JPS5724068A
JPS5724068A JP9837980A JP9837980A JPS5724068A JP S5724068 A JPS5724068 A JP S5724068A JP 9837980 A JP9837980 A JP 9837980A JP 9837980 A JP9837980 A JP 9837980A JP S5724068 A JPS5724068 A JP S5724068A
Authority
JP
Japan
Prior art keywords
substrate
photomagnetic disk
diameter
disk device
photomagnetic
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
JP9837980A
Other languages
Japanese (ja)
Inventor
Akira Muto
Hideji Kawabata
Masahiro Orukawa
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 JP9837980A priority Critical patent/JPS5724068A/en
Publication of JPS5724068A publication Critical patent/JPS5724068A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To realize an automatic detection for both surfaces of a photomagnetic disk of both-surface reflection type in a simple constitution, by setting the diameter of a substrate larger than the other substrate of both surfaces of the photomagnetic disk and then detecting the diameter.
CONSTITUTION: A back substrate 7' has a larger diameter than a surface substrate 7 for a both-surface reflection type photomagnetic disk containing magnetic thin films 1 and 1' which are opposed to each other. A switch 13 of a turntable 10 is provided at the position where it is actuated by the substrate 7' and not by the substrate 7 respectively. In such a way, the surface or back surface of a photomagnetic disk can be automatically detected in a simple constitution.
COPYRIGHT: (C)1982,JPO&Japio
JP9837980A 1980-07-17 1980-07-17 Photomagnetic disk device Pending JPS5724068A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9837980A JPS5724068A (en) 1980-07-17 1980-07-17 Photomagnetic disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9837980A JPS5724068A (en) 1980-07-17 1980-07-17 Photomagnetic disk device

Publications (1)

Publication Number Publication Date
JPS5724068A true JPS5724068A (en) 1982-02-08

Family

ID=14218234

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9837980A Pending JPS5724068A (en) 1980-07-17 1980-07-17 Photomagnetic disk device

Country Status (1)

Country Link
JP (1) JPS5724068A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61217565A (en) * 1985-03-25 1986-09-27 Nippon Steel Corp Manufacture of steel sheet coated with pb-sn alloy by continuous hot dipping
JPH0778373A (en) * 1992-12-31 1995-03-20 Internatl Business Mach Corp <Ibm> Double-sided magneto-optic disk and direct overriding method and device of double-sided magneto-optic disk

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61217565A (en) * 1985-03-25 1986-09-27 Nippon Steel Corp Manufacture of steel sheet coated with pb-sn alloy by continuous hot dipping
JPH0778373A (en) * 1992-12-31 1995-03-20 Internatl Business Mach Corp <Ibm> Double-sided magneto-optic disk and direct overriding method and device of double-sided magneto-optic disk

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