JPS5868248A - Optical information reader - Google Patents

Optical information reader

Info

Publication number
JPS5868248A
JPS5868248A JP16632481A JP16632481A JPS5868248A JP S5868248 A JPS5868248 A JP S5868248A JP 16632481 A JP16632481 A JP 16632481A JP 16632481 A JP16632481 A JP 16632481A JP S5868248 A JPS5868248 A JP S5868248A
Authority
JP
Japan
Prior art keywords
optical information
information reader
mass
movable
light source
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
JP16632481A
Other languages
Japanese (ja)
Other versions
JPH0315261B2 (en
Inventor
Akira Yamada
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 JP56166324A priority Critical patent/JPH0315261B2/ja
Publication of JPS5868248A publication Critical patent/JPS5868248A/en
Publication of JPH0315261B2 publication Critical patent/JPH0315261B2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08Disposition or mounting of heads or light sources relatively to record carriers

Abstract

PURPOSE:To reduce the mass of a movable part by driving an objective, a condenser lens and a photodetector separately from a laser light source. CONSTITUTION:Lenses 25 and 27, and a photodetector 28 are fixed to a lens barrel 29, and a driving circuit 32 performs focusing and tracking. A light source 20, a collimator lens 21, a polarization beam splitter 23, etc., are separated from the lens barrel 29, and the mass of a movable part is small.
JP56166324A 1981-10-20 1981-10-20 Expired - Lifetime JPH0315261B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56166324A JPH0315261B2 (en) 1981-10-20 1981-10-20

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56166324A JPH0315261B2 (en) 1981-10-20 1981-10-20

Publications (2)

Publication Number Publication Date
JPS5868248A true JPS5868248A (en) 1983-04-23
JPH0315261B2 JPH0315261B2 (en) 1991-02-28

Family

ID=15829241

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56166324A Expired - Lifetime JPH0315261B2 (en) 1981-10-20 1981-10-20

Country Status (1)

Country Link
JP (1) JPH0315261B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61292116A (en) * 1985-06-19 1986-12-22 Matsushita Electric Ind Co Ltd Lens body

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52138903A (en) * 1976-05-12 1977-11-19 Philips Nv Optical scanner
JPS5677028U (en) * 1979-11-12 1981-06-23

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52138903A (en) * 1976-05-12 1977-11-19 Philips Nv Optical scanner
JPS5677028U (en) * 1979-11-12 1981-06-23

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61292116A (en) * 1985-06-19 1986-12-22 Matsushita Electric Ind Co Ltd Lens body

Also Published As

Publication number Publication date
JPH0315261B2 (en) 1991-02-28

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