JPS59144055A - Optical head - Google Patents

Optical head

Info

Publication number
JPS59144055A
JPS59144055A JP58020327A JP2032783A JPS59144055A JP S59144055 A JPS59144055 A JP S59144055A JP 58020327 A JP58020327 A JP 58020327A JP 2032783 A JP2032783 A JP 2032783A JP S59144055 A JPS59144055 A JP S59144055A
Authority
JP
Japan
Prior art keywords
objective
optical
optical head
optical axis
photodetector
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
JP58020327A
Other languages
Japanese (ja)
Other versions
JPH0827948B2 (en
Inventor
Toyokazu Noda
Yutaka Oki
Kiyoshi Toyoda
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 JP58020327A priority Critical patent/JPH0827948B2/en
Publication of JPS59144055A publication Critical patent/JPS59144055A/en
Publication of JPH0827948B2 publication Critical patent/JPH0827948B2/en
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
    • G11B7/12Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/123Integrated head arrangements, e.g. with source and detectors mounted on the same substrate

Abstract

PURPOSE:To reduce the length of an optical head in the optical axis direction of an objective by shifting together the objective, the semiconductor laser of a light source and an optical system including a photodetector. CONSTITUTION:An optical head contains a semiconductor laser 21 which forms a light source, a polarized beam splitter 22, a 1/4 wavelength plate 24, a rectangular prism 25, an objective 26, a photodetector 28 which detects the laser light reflected by the splitter 22, etc. in one body. Such an optical system is shifted toward the optical axis of the lens 26 as well as in the direction rectangular to said optical axis for purposes of focusing and tracking respectively. Therefore it is possible to reduce the size of the objective 26 as well as the distance between the objective 26 and the prism 25 in comparison with the case where only the objective 26 is shifted. As a result, the length of the optical head can be reduced in the optical axis direction of the objective 26.
JP58020327A 1983-02-08 1983-02-08 Optical head Expired - Lifetime JPH0827948B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58020327A JPH0827948B2 (en) 1983-02-08 1983-02-08 Optical head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58020327A JPH0827948B2 (en) 1983-02-08 1983-02-08 Optical head

Publications (2)

Publication Number Publication Date
JPS59144055A true JPS59144055A (en) 1984-08-17
JPH0827948B2 JPH0827948B2 (en) 1996-03-21

Family

ID=12024033

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58020327A Expired - Lifetime JPH0827948B2 (en) 1983-02-08 1983-02-08 Optical head

Country Status (1)

Country Link
JP (1) JPH0827948B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62234243A (en) * 1986-03-26 1987-10-14 Nec Home Electronics Ltd Optical pickup device
JP2007535719A (en) * 2003-07-07 2007-12-06 シンボル テクノロジーズ インコーポレイテッド Imaging apparatus and barcode imager for imaging optical code or target at multiple focal planes

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55163566A (en) * 1979-06-05 1980-12-19 Sony Corp Hologram lens and its production and optical system signal using this hologram lens
JPS5630439U (en) * 1979-08-06 1981-03-24
JPS56144136A (en) * 1980-04-14 1981-11-10 Mitsubishi Rayon Co Ltd Injection molding device for polyester resin

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55163566A (en) * 1979-06-05 1980-12-19 Sony Corp Hologram lens and its production and optical system signal using this hologram lens
JPS5630439U (en) * 1979-08-06 1981-03-24
JPS56144136A (en) * 1980-04-14 1981-11-10 Mitsubishi Rayon Co Ltd Injection molding device for polyester resin

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62234243A (en) * 1986-03-26 1987-10-14 Nec Home Electronics Ltd Optical pickup device
JP2007535719A (en) * 2003-07-07 2007-12-06 シンボル テクノロジーズ インコーポレイテッド Imaging apparatus and barcode imager for imaging optical code or target at multiple focal planes

Also Published As

Publication number Publication date
JPH0827948B2 (en) 1996-03-21

Similar Documents

Publication Publication Date Title
JPS6374133A (en) Optical pickup device
JPS598145A (en) Optical pickup
JPS59144055A (en) Optical head
JPS6069614A (en) Light condensing device
JPS622217A (en) Semiconductor laser with single mode fiber
JPS61214146A (en) Optical head
JPS62129944A (en) Optical head
JPS5710284A (en) Laser device
JPS62205546A (en) Optical head
JPS6284439A (en) Optical pickup device
JPS58146038A (en) Recording and reproducing optical head
JPS61230636A (en) Optical pickup
JPS61278822A (en) Light synthesizing and separating member
JPS5856238A (en) Magneto-optical recording and reproducing head
JPS5872125A (en) Optical scanning device
JPS5914145A (en) Optical device for optical disk
JPS5868248A (en) Optical information reader
JPS6363137A (en) Optical head
JPH01269248A (en) Optical recording and reproducing device
JPS60263337A (en) Optical head
JPH02100014A (en) Astigmatism compensation optical system
JPS5977643A (en) Optical type pickup device
JPS59195330A (en) Optical head
JPH02273337A (en) Optical head
JPS62238515A (en) Semiconductor laser beam synthesizer