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ES8400828A1 - Una unidad de lectora y-o escritura optica para leer y-o registrar areas de imformacion en una superficie de informacion reflectante de radiacion. - Google Patents

Una unidad de lectora y-o escritura optica para leer y-o registrar areas de imformacion en una superficie de informacion reflectante de radiacion.

Info

Publication number
ES8400828A1
ES8400828A1 ES516223A ES516223A ES8400828A1 ES 8400828 A1 ES8400828 A1 ES 8400828A1 ES 516223 A ES516223 A ES 516223A ES 516223 A ES516223 A ES 516223A ES 8400828 A1 ES8400828 A1 ES 8400828A1
Authority
ES
Spain
Prior art keywords
prism
manufacturing
unit provided
write unit
splitting
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
Application number
ES516223A
Other languages
English (en)
Other versions
ES516223A0 (es
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of ES516223A0 publication Critical patent/ES516223A0/es
Publication of ES8400828A1 publication Critical patent/ES8400828A1/es
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • 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
    • G11B7/1381—Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops
    • 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
    • G02B27/10—Beam splitting or combining systems
    • G02B27/16—Beam splitting or combining systems used as aids for focusing
    • 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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only
    • 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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only
    • G11B7/0916—Foucault or knife-edge methods
    • 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
    • G11B7/1356—Double or multiple prisms, i.e. having two or more prisms in cooperation
    • 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
    • G11B7/22—Apparatus or processes for the manufacture of optical heads, e.g. assembly

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Head (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

UNIDAD DE LECTURA Y ESCRITURA OPTICA PARA SUPERFICIES DE REGISTRO DE INFORMACION.COMPRENDE: UNA FUENTE (3) DE RADIACION; UN SISTEMA DE OBJETIVO (5) PARA ENFOCAR UN HAZ (B) EMITIDO POR LA FUENTE DE MODO QUE SE FORME UNA MANCHA DE RADIACION (V) SOBRE LA SUPERFICIE DE INFORMACION (2); Y UN PRISMA DIVISOR DE HAZ (6), PROVISTO A SU VEZ DE UN PRISMA (14) DE FORMA DE CUMBRERA DE TEJADO, DISPUESTO ENTRE LA FUENTE DE RADIACION Y EL SISTEMA DE OBJETIVO, PARA DESVIAR EL HAZ QUE HA SIDO REFLEJADO POR LA SUPERFICIE DE INFORMACION LLEVANDOLO FUERA DE LA TRAYECTORIA DE RADIACIONDEL HAZ EMITIDO POR LA FUENTE Y HACIA UN SISTEMA DE DETECCION SENSIBLE A LA RADIACION. EL PRISMA DE FORMA DE CUMBRERA DE TEJADO ESTA HECHO DE UN MATERIAL SINTETICO TRANSPARENTE CURADO.
ES516223A 1981-10-08 1982-10-05 Una unidad de lectora y-o escritura optica para leer y-o registrar areas de imformacion en una superficie de informacion reflectante de radiacion. Expired ES8400828A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8104588A NL8104588A (nl) 1981-10-08 1981-10-08 Bundelscheidingsprisma, werkwijze voor het vervaardigen van dit prisma en van dit prisma voorziene optische lees- en/of schrijfeenheid.

Publications (2)

Publication Number Publication Date
ES516223A0 ES516223A0 (es) 1983-11-01
ES8400828A1 true ES8400828A1 (es) 1983-11-01

Family

ID=19838192

Family Applications (2)

Application Number Title Priority Date Filing Date
ES516223A Expired ES8400828A1 (es) 1981-10-08 1982-10-05 Una unidad de lectora y-o escritura optica para leer y-o registrar areas de imformacion en una superficie de informacion reflectante de radiacion.
ES524474A Granted ES524474A0 (es) 1981-10-08 1983-07-27 Un metodo de fabricar un prisma divisor de haz

Family Applications After (1)

Application Number Title Priority Date Filing Date
ES524474A Granted ES524474A0 (es) 1981-10-08 1983-07-27 Un metodo de fabricar un prisma divisor de haz

Country Status (17)

Country Link
US (1) US4489408A (es)
JP (1) JPS5872104A (es)
KR (1) KR890001223B1 (es)
AU (1) AU549592B2 (es)
BE (1) BE894618A (es)
CA (1) CA1186926A (es)
CH (1) CH660803A5 (es)
DD (1) DD204168A5 (es)
DE (1) DE3235627A1 (es)
ES (2) ES8400828A1 (es)
FR (1) FR2514516B1 (es)
GB (1) GB2107483B (es)
HK (1) HK2686A (es)
IT (1) IT1152694B (es)
NL (1) NL8104588A (es)
SE (1) SE8205670L (es)
ZA (1) ZA826547B (es)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8304212A (nl) * 1983-12-07 1984-10-01 Philips Nv Enkelvoudige collimatorlens met een asferisch oppervlak.
US4670869A (en) * 1984-01-03 1987-06-02 Magnetic Peripherals Inc. Switching laser beam apparatus with recombined beam for recording
NL8400868A (nl) * 1984-03-19 1984-10-01 Philips Nv Gelaagde optische component.
NL8403034A (nl) * 1984-10-05 1986-05-01 Philips Nv Opto-elektronisch fokusfout-detektiestelsel.
NL8501489A (nl) * 1985-05-24 1986-12-16 Philips Nv Positie-gevoelige stralingsdetector.
JPH0734264B2 (ja) * 1986-09-05 1995-04-12 キヤノン株式会社 光学式情報記録再生装置
US5231621A (en) * 1986-09-05 1993-07-27 Canon Kabushiki Kaisha Focus detector which serves to split off a portion of a detected light beam only when the detected light beam is not refocused at an expected refocus point
EP0283002B1 (en) * 1987-03-17 1994-02-16 Matsushita Electric Industrial Co., Ltd. Optical head
JPH02265028A (ja) * 1989-04-06 1990-10-29 Mitsubishi Electric Corp 光記録再生装置
CA2012401C (en) * 1989-05-26 1994-05-10 Anthony G. Dewey Focus-error detection using prism-enhanced spot size monitoring
US4998011A (en) * 1989-11-17 1991-03-05 Applied Magnetics Corporation Flat plate focus sensing apparatus
US5216562A (en) * 1990-09-25 1993-06-01 International Business Machines Corporation Multi-beam optical recording system and method
US5245174A (en) * 1990-10-15 1993-09-14 Applied Magnetics Corporation Focus sensing apparatus utilizing a reflecting surface having variable reflectivity
GB2248989B (en) * 1990-10-15 1995-05-24 Applied Magnetics Corp Focus sensing apparatus and method
US5331622A (en) * 1991-05-28 1994-07-19 Applied Magnetics Corporation Compact optical head
US5646778A (en) * 1991-05-28 1997-07-08 Discovision Associates Optical beamsplitter
DE10125469B4 (de) 2001-05-25 2008-01-10 Leica Microsystems Cms Gmbh Vorrichtung zur Ermittlung einer Lichtleistung, Mikroskop und Verfahren zur Mikroskopie
US7808617B2 (en) * 2007-09-17 2010-10-05 Quality Vision International, Inc. Dual resolution, dual range sensor system and method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE465729A (es) *
US2178245A (en) * 1936-06-24 1939-10-31 Klangfilm Gmbh Sound recording apparatus
DE1069874B (de) * 1954-05-18 1959-11-26 American Cyanamid Company, New York, N. Y. (V. St. A.) Verfahren zur Herstellung von Mischpolymeren
DE2722470A1 (de) * 1977-05-18 1978-11-23 Eder Siebdruck Kunststoffverar Keilscheibenanordnung zur gleichmaessigen ausleuchtung von flaechen
JPS6029081B2 (ja) * 1978-07-13 1985-07-09 三菱電機株式会社 半導体発光装置の製造方法

Also Published As

Publication number Publication date
GB2107483B (en) 1985-07-17
KR890001223B1 (ko) 1989-04-27
CH660803A5 (de) 1987-06-15
DE3235627C2 (es) 1987-11-26
ES516223A0 (es) 1983-11-01
SE8205670D0 (sv) 1982-10-05
HK2686A (en) 1986-01-24
ES8404520A1 (es) 1984-04-16
NL8104588A (nl) 1983-05-02
CA1186926A (en) 1985-05-14
IT1152694B (it) 1987-01-07
KR840002113A (ko) 1984-06-11
IT8223619A0 (it) 1982-10-05
AU8912582A (en) 1983-04-14
DE3235627A1 (de) 1983-04-28
SE8205670L (sv) 1983-04-09
ZA826547B (en) 1984-04-25
FR2514516B1 (fr) 1986-08-29
DD204168A5 (de) 1983-11-16
BE894618A (fr) 1983-04-06
US4489408A (en) 1984-12-18
AU549592B2 (en) 1986-01-30
JPS5872104A (ja) 1983-04-30
GB2107483A (en) 1983-04-27
ES524474A0 (es) 1984-04-16
FR2514516A1 (fr) 1983-04-15

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