JPS5470004A - Optical information reader - Google Patents

Optical information reader

Info

Publication number
JPS5470004A
JPS5470004A JP13697477A JP13697477A JPS5470004A JP S5470004 A JPS5470004 A JP S5470004A JP 13697477 A JP13697477 A JP 13697477A JP 13697477 A JP13697477 A JP 13697477A JP S5470004 A JPS5470004 A JP S5470004A
Authority
JP
Japan
Prior art keywords
optical fibers
tracking
disc
reflected
disposed
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
JP13697477A
Other languages
Japanese (ja)
Inventor
Akiya 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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP13697477A priority Critical patent/JPS5470004A/en
Publication of JPS5470004A publication Critical patent/JPS5470004A/en
Pending legal-status Critical Current

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  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE: To achieve this miniaturization of pickup head part and the simplification of tracking means by using optical fibers for tramsission and reception of signal light and integrally providing tracking optical fibers.
CONSTITUTION: A semiconductor laser 2 as a light source, a one-way device 4, a beam splitter 5 and a photo detector 8 are disposed in the positions away from a disc 1. A signal light transmitting-receiving optical fiber 61 is disposed between these and tracking optical fibers 62, 63 which transmit and receive auxiliary beams for tracking are adjacently provided. This causes a read light beam 3 and the reflected light beam 7 having been modulated with the disc 1 to be transmitted through the optical fiber 61 and to be detected with the photo detector 8, and the auxiliary beams and the reflected auxiliary beam having been reflected with the disc 1 to be tramsitted through the optical fibers 62, 63.
COPYRIGHT: (C)1979,JPO&Japio
JP13697477A 1977-11-15 1977-11-15 Optical information reader Pending JPS5470004A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13697477A JPS5470004A (en) 1977-11-15 1977-11-15 Optical information reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13697477A JPS5470004A (en) 1977-11-15 1977-11-15 Optical information reader

Publications (1)

Publication Number Publication Date
JPS5470004A true JPS5470004A (en) 1979-06-05

Family

ID=15187813

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13697477A Pending JPS5470004A (en) 1977-11-15 1977-11-15 Optical information reader

Country Status (1)

Country Link
JP (1) JPS5470004A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0039836A2 (en) * 1980-05-12 1981-11-18 Northern Telecom Limited A scanning head for an optical disc system
JPS56165936A (en) * 1980-05-22 1981-12-19 Sharp Corp Optical information reproducer
JPS5764340A (en) * 1980-10-06 1982-04-19 Mitsubishi Electric Corp Track following controller

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0039836A2 (en) * 1980-05-12 1981-11-18 Northern Telecom Limited A scanning head for an optical disc system
EP0039836A3 (en) * 1980-05-12 1982-05-19 Northern Telecom Limited A scanning head for an optical disc system
JPS56165936A (en) * 1980-05-22 1981-12-19 Sharp Corp Optical information reproducer
JPS5764340A (en) * 1980-10-06 1982-04-19 Mitsubishi Electric Corp Track following controller

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