JPS5257801A - Optical type sound groove detector - Google Patents

Optical type sound groove detector

Info

Publication number
JPS5257801A
JPS5257801A JP13304775A JP13304775A JPS5257801A JP S5257801 A JPS5257801 A JP S5257801A JP 13304775 A JP13304775 A JP 13304775A JP 13304775 A JP13304775 A JP 13304775A JP S5257801 A JPS5257801 A JP S5257801A
Authority
JP
Japan
Prior art keywords
sound groove
type sound
optical type
groove detector
main
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
JP13304775A
Other languages
Japanese (ja)
Other versions
JPS5849940B2 (en
Inventor
Toshihiko 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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP13304775A priority Critical patent/JPS5849940B2/en
Publication of JPS5257801A publication Critical patent/JPS5257801A/en
Publication of JPS5849940B2 publication Critical patent/JPS5849940B2/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
    • G11B3/02—Arrangements of heads
    • G11B3/06—Determining or indicating positions of head
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/12—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark

Abstract

PURPOSE:To determine the distinction between a flat part and a sound groove part by incling a main optaical axis of a luminescent part 45 deg. against disk surface and paralelling a main optical axis of a reovering light part with a main iptical axis of a luminescent part.
JP13304775A 1975-11-07 1975-11-07 Kougakushikiotomizokenshiyutsusouchi Expired JPS5849940B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13304775A JPS5849940B2 (en) 1975-11-07 1975-11-07 Kougakushikiotomizokenshiyutsusouchi

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13304775A JPS5849940B2 (en) 1975-11-07 1975-11-07 Kougakushikiotomizokenshiyutsusouchi

Publications (2)

Publication Number Publication Date
JPS5257801A true JPS5257801A (en) 1977-05-12
JPS5849940B2 JPS5849940B2 (en) 1983-11-08

Family

ID=15095559

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13304775A Expired JPS5849940B2 (en) 1975-11-07 1975-11-07 Kougakushikiotomizokenshiyutsusouchi

Country Status (1)

Country Link
JP (1) JPS5849940B2 (en)

Also Published As

Publication number Publication date
JPS5849940B2 (en) 1983-11-08

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