JPS5470003A - Optical information reader - Google Patents

Optical information reader

Info

Publication number
JPS5470003A
JPS5470003A JP13697377A JP13697377A JPS5470003A JP S5470003 A JPS5470003 A JP S5470003A JP 13697377 A JP13697377 A JP 13697377A JP 13697377 A JP13697377 A JP 13697377A JP S5470003 A JPS5470003 A JP S5470003A
Authority
JP
Japan
Prior art keywords
disc
optical fibers
optical
focusing
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
JP13697377A
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 JP13697377A priority Critical patent/JPS5470003A/en
Publication of JPS5470003A publication Critical patent/JPS5470003A/en
Pending legal-status Critical Current

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  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE: To achieve the miniaturization of pickup head part and simplification of focusing means by using optical fibers for transmission and reception of signal light and integrally providing focusing optical fibers.
CONSTITUTION: A read light source, a beam splitter and photo detector are disposed in the position away from a disc 1. A signal light transmitting-receiving optical fiber 61 as a pickup head part is disposed between these and the disc 1. In adjacent to this, forcusing optical fibers 64, 65 whose end parts are so tilted as to view the focusing point of the read light beam are disposed. The disc 1 side thereof is held by holders 101, 102 to be made elevatable. This causes the reflected light beam having been modulated with the read light beam and disc 1 to be transmitted through the optical fibre 61. In addition, the output light detected in the optical 61 and the output light detected in the optical fiber 61 and the output light detected in the optical fibers 64, 65 are compared and the holders 101, 102 are so vertically moved as to balance both, whereby focusing controlling is accomplished.
COPYRIGHT: (C)1979,JPO&Japio
JP13697377A 1977-11-15 1977-11-15 Optical information reader Pending JPS5470003A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13697377A JPS5470003A (en) 1977-11-15 1977-11-15 Optical information reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13697377A JPS5470003A (en) 1977-11-15 1977-11-15 Optical information reader

Publications (1)

Publication Number Publication Date
JPS5470003A true JPS5470003A (en) 1979-06-05

Family

ID=15187790

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13697377A Pending JPS5470003A (en) 1977-11-15 1977-11-15 Optical information reader

Country Status (1)

Country Link
JP (1) JPS5470003A (en)

Cited By (2)

* 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
JPH07302449A (en) * 1988-04-06 1995-11-14 Mitsubishi Electric Corp Optical disk recording and reproducing device

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
EP0039836A3 (en) * 1980-05-12 1982-05-19 Northern Telecom Limited A scanning head for an optical disc system
JPH07302449A (en) * 1988-04-06 1995-11-14 Mitsubishi Electric Corp Optical disk recording and reproducing device

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