DE69032301T2 - Optisches Element und dieses enthaltende optische Abtasteinrichtung - Google Patents

Optisches Element und dieses enthaltende optische Abtasteinrichtung

Info

Publication number
DE69032301T2
DE69032301T2 DE69032301T DE69032301T DE69032301T2 DE 69032301 T2 DE69032301 T2 DE 69032301T2 DE 69032301 T DE69032301 T DE 69032301T DE 69032301 T DE69032301 T DE 69032301T DE 69032301 T2 DE69032301 T2 DE 69032301T2
Authority
DE
Germany
Prior art keywords
same
scanning device
device containing
optical
optical element
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.)
Expired - Lifetime
Application number
DE69032301T
Other languages
English (en)
Other versions
DE69032301D1 (de
Inventor
Yoshio Yoshida
Takahiro Miyake
Yasuo Nakata
Yukio Kurata
Nobuo Ogata
Tetsuo Ueyama
Hideaki Sato
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.)
Sharp Corp
Original Assignee
Sharp 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
Priority claimed from JP1081707A external-priority patent/JPH02259702A/ja
Priority claimed from JP1148100A external-priority patent/JPH0823605B2/ja
Priority claimed from JP1234204A external-priority patent/JPH0396902A/ja
Priority claimed from JP1290710A external-priority patent/JPH03152428A/ja
Priority claimed from JP1298105A external-priority patent/JP2574907B2/ja
Application filed by Sharp Corp filed Critical Sharp Corp
Application granted granted Critical
Publication of DE69032301D1 publication Critical patent/DE69032301D1/de
Publication of DE69032301T2 publication Critical patent/DE69032301T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording 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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1365—Separate or integrated refractive elements, e.g. wave plates
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/11—Anti-reflection coatings
    • G02B1/118—Anti-reflection coatings having sub-optical wavelength surface structures designed to provide an enhanced transmittance, e.g. moth-eye structures
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
    • G02B27/4261—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect having a diffractive element with major polarization dependent properties
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
    • G02B27/4272—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect having plural diffractive elements positioned sequentially along the optical path
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/18—Diffraction gratings
    • G02B5/1809—Diffraction gratings with pitch less than or comparable to the wavelength
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/18—Diffraction gratings
    • G02B5/1814—Diffraction gratings structurally combined with one or more further optical elements, e.g. lenses, mirrors, prisms or other diffraction gratings
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/18—Diffraction gratings
    • G02B5/1866—Transmission gratings characterised by their structure, e.g. step profile, contours of substrate or grooves, pitch variations, materials
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10532—Heads
    • G11B11/10541—Heads for reproducing
    • G11B11/10543—Heads for reproducing using optical beam of radiation
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording 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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1353—Diffractive elements, e.g. holograms or gratings
DE69032301T 1989-03-31 1990-03-30 Optisches Element und dieses enthaltende optische Abtasteinrichtung Expired - Lifetime DE69032301T2 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP1081707A JPH02259702A (ja) 1989-03-31 1989-03-31 偏光回折素子
JP1148100A JPH0823605B2 (ja) 1989-06-09 1989-06-09 偏光回折素子並びにそれを含む光ピックアップ装置
JP1234204A JPH0396902A (ja) 1989-09-08 1989-09-08 光学素子
JP1290710A JPH03152428A (ja) 1989-11-08 1989-11-08 偏光検出装置
JP1298105A JP2574907B2 (ja) 1989-11-15 1989-11-15 偏光回折素子ユニット並びにそれを含む光ピックアップ装置

Publications (2)

Publication Number Publication Date
DE69032301D1 DE69032301D1 (de) 1998-06-18
DE69032301T2 true DE69032301T2 (de) 1998-11-19

Family

ID=27524936

Family Applications (2)

Application Number Title Priority Date Filing Date
DE69032301T Expired - Lifetime DE69032301T2 (de) 1989-03-31 1990-03-30 Optisches Element und dieses enthaltende optische Abtasteinrichtung
DE69033972T Expired - Lifetime DE69033972T2 (de) 1989-03-31 1990-03-30 Optisches Bauteil und damit versehenes optisches Wiedergabegerät.

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE69033972T Expired - Lifetime DE69033972T2 (de) 1989-03-31 1990-03-30 Optisches Bauteil und damit versehenes optisches Wiedergabegerät.

Country Status (5)

Country Link
US (1) US5085496A (de)
EP (2) EP0390610B1 (de)
KR (1) KR0144569B1 (de)
CA (1) CA2013538C (de)
DE (2) DE69032301T2 (de)

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EP0803868B1 (de) 2002-06-12
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DE69032301D1 (de) 1998-06-18
US5085496A (en) 1992-02-04
CA2013538A1 (en) 1990-09-30
EP0390610B1 (de) 1998-05-13
EP0803868A2 (de) 1997-10-29
CA2013538C (en) 1995-05-09
KR0144569B1 (ko) 1998-11-16
EP0803868A3 (de) 1997-11-12
EP0390610A3 (de) 1992-09-16
DE69033972D1 (de) 2002-07-18
KR900014915A (ko) 1990-10-25

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