JPS52108801A - Size detector for records - Google Patents

Size detector for records

Info

Publication number
JPS52108801A
JPS52108801A JP2593776A JP2593776A JPS52108801A JP S52108801 A JPS52108801 A JP S52108801A JP 2593776 A JP2593776 A JP 2593776A JP 2593776 A JP2593776 A JP 2593776A JP S52108801 A JPS52108801 A JP S52108801A
Authority
JP
Japan
Prior art keywords
records
size detector
record
focusing
simplify
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
JP2593776A
Other languages
Japanese (ja)
Inventor
Susumu Hoshimi
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP2593776A priority Critical patent/JPS52108801A/en
Publication of JPS52108801A publication Critical patent/JPS52108801A/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
    • 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
    • G11B19/124—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark involving the detection of diameter of disks

Abstract

PURPOSE:To obtain the size information of a record so as to simplify the construction by focusing the edge of the record on a screen to detect the focused position with the use of an optical detecting element.
JP2593776A 1976-03-10 1976-03-10 Size detector for records Pending JPS52108801A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2593776A JPS52108801A (en) 1976-03-10 1976-03-10 Size detector for records

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2593776A JPS52108801A (en) 1976-03-10 1976-03-10 Size detector for records

Publications (1)

Publication Number Publication Date
JPS52108801A true JPS52108801A (en) 1977-09-12

Family

ID=12179672

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2593776A Pending JPS52108801A (en) 1976-03-10 1976-03-10 Size detector for records

Country Status (1)

Country Link
JP (1) JPS52108801A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5682763U (en) * 1979-11-30 1981-07-03
JPS58100234A (en) * 1981-12-10 1983-06-14 Teac Co Optical reproducing device
JPS58102340A (en) * 1981-12-11 1983-06-17 Teac Co Optical reproducing device
JPH02138833A (en) * 1988-11-18 1990-05-28 Mitsubishi Motors Corp Fire position detector within engine combustion chamber

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5682763U (en) * 1979-11-30 1981-07-03
JPS58100234A (en) * 1981-12-10 1983-06-14 Teac Co Optical reproducing device
JPS6360448B2 (en) * 1981-12-10 1988-11-24
JPS58102340A (en) * 1981-12-11 1983-06-17 Teac Co Optical reproducing device
JPS6343814B2 (en) * 1981-12-11 1988-09-01 Teac Corp
JPH02138833A (en) * 1988-11-18 1990-05-28 Mitsubishi Motors Corp Fire position detector within engine combustion chamber

Similar Documents

Publication Publication Date Title
NL7804653A (en) OPTICAL RECORDING MEDIA.
NL176610B (en) OPTICAL INFORMATION PLATE.
AU514749B2 (en) Optical read unit with track following focusing arrangement
NO149795C (en) OPTICAL READING DEVICE FOR RADIATION REFLECTING INFORMATION TRACK, SPECIAL FOR READING A VIDEO PLATE
NO770240L (en) DEVICE FOR READING A RECORD BREADER WITH OPTIC READABLE INFORMATION STRUCTURE.
NL7702970A (en) OPTICAL RECORDING MEDIA.
JPS52108801A (en) Size detector for records
JPS5387217A (en) Focusing device
JPS52134704A (en) Optical recorder/reproducer unit
JPS5398802A (en) Optical reproducer
JPS533305A (en) Optical reproduction device
JPS52138924A (en) Focal detector
JPS53112705A (en) Optical system information reproducer
JPS5417038A (en) Optical scanning system
JPS53148412A (en) Optical recorder or reproducer
JPS53110805A (en) Optical information recording/reproducing device
JPS5417620A (en) Solid pickup element
JPS53121644A (en) Detecting method of focal position using holograph
JPS5328404A (en) Optical information re producer
JPS545616A (en) Detector for intra-viewfield change
JPS536001A (en) Focus location detector for optical recording medium
JPS52142501A (en) Focal point detection for video disc apparatus
JPS5315107A (en) Spacing detector of optical recorder/repoducer
JPS52136612A (en) Magnetic head device
JPS53130002A (en) Tone arm revolution detector