JPS5320904A - Optical information reader - Google Patents

Optical information reader

Info

Publication number
JPS5320904A
JPS5320904A JP9496876A JP9496876A JPS5320904A JP S5320904 A JPS5320904 A JP S5320904A JP 9496876 A JP9496876 A JP 9496876A JP 9496876 A JP9496876 A JP 9496876A JP S5320904 A JPS5320904 A JP S5320904A
Authority
JP
Japan
Prior art keywords
optical information
information reader
light
accruacy
focus
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
JP9496876A
Other languages
Japanese (ja)
Other versions
JPS5427244B2 (en
Inventor
Shigeo Tsuji
Original Assignee
Toshiba 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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP9496876A priority Critical patent/JPS5427244B2/ja
Publication of JPS5320904A publication Critical patent/JPS5320904A/en
Publication of JPS5427244B2 publication Critical patent/JPS5427244B2/ja
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To read information at high accruacy by generating at least five light beams from a light source, and using one of them for information reading and each two of the others for position detection of track and focus.
COPYRIGHT: (C)1978,JPO&Japio
JP9496876A 1976-08-11 1976-08-11 Expired JPS5427244B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9496876A JPS5427244B2 (en) 1976-08-11 1976-08-11

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9496876A JPS5427244B2 (en) 1976-08-11 1976-08-11

Publications (2)

Publication Number Publication Date
JPS5320904A true JPS5320904A (en) 1978-02-25
JPS5427244B2 JPS5427244B2 (en) 1979-09-08

Family

ID=14124707

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9496876A Expired JPS5427244B2 (en) 1976-08-11 1976-08-11

Country Status (1)

Country Link
JP (1) JPS5427244B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5942646A (en) * 1982-08-31 1984-03-09 Sony Corp Radial skew correcting device of disk device
US4446545A (en) * 1982-01-21 1984-05-01 U.S. Philips Corporation Apparatus for reading a disk-shaped record carrier
US4532522A (en) * 1981-08-28 1985-07-30 Hitachi, Ltd. Optical recording apparatus
JPS6211492A (en) * 1985-07-09 1987-01-20 Toyo Kasei Kogyo Co Ltd Method and apparatus for bundling ring stitch yarn end
JPH01303632A (en) * 1988-06-01 1989-12-07 Hitachi Ltd Optical disk device
US4982395A (en) * 1988-10-03 1991-01-01 Storage Technology Partners Ii Composite optical grating for optical disk data storage systems

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4532522A (en) * 1981-08-28 1985-07-30 Hitachi, Ltd. Optical recording apparatus
US4446545A (en) * 1982-01-21 1984-05-01 U.S. Philips Corporation Apparatus for reading a disk-shaped record carrier
JPS5942646A (en) * 1982-08-31 1984-03-09 Sony Corp Radial skew correcting device of disk device
JPH0580051B2 (en) * 1982-08-31 1993-11-05 Sony Corp
JPS6211492A (en) * 1985-07-09 1987-01-20 Toyo Kasei Kogyo Co Ltd Method and apparatus for bundling ring stitch yarn end
JPH0366914B2 (en) * 1985-07-09 1991-10-21 Toyo Kasei Kogyo Kk
JPH01303632A (en) * 1988-06-01 1989-12-07 Hitachi Ltd Optical disk device
US4982395A (en) * 1988-10-03 1991-01-01 Storage Technology Partners Ii Composite optical grating for optical disk data storage systems

Also Published As

Publication number Publication date
JPS5427244B2 (en) 1979-09-08

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