ZA75374B - Apparatus for reading a record carrier on which information is stored in an optically readable structure - Google Patents

Apparatus for reading a record carrier on which information is stored in an optically readable structure

Info

Publication number
ZA75374B
ZA75374B ZA00750374A ZA75374A ZA75374B ZA 75374 B ZA75374 B ZA 75374B ZA 00750374 A ZA00750374 A ZA 00750374A ZA 75374 A ZA75374 A ZA 75374A ZA 75374 B ZA75374 B ZA 75374B
Authority
ZA
South Africa
Prior art keywords
reading
stored
information
record carrier
optically readable
Prior art date
Application number
ZA00750374A
Other languages
English (en)
Inventor
G Bouwhuis
C Simons
Original Assignee
Philips 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 Nv filed Critical Philips Nv
Publication of ZA75374B publication Critical patent/ZA75374B/xx

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
    • G11B7/1356—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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
  • Optical Recording Or Reproduction (AREA)
ZA00750374A 1974-02-15 1975-01-20 Apparatus for reading a record carrier on which information is stored in an optically readable structure ZA75374B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NLAANVRAGE7402170,A NL176314C (nl) 1974-02-15 1974-02-15 Inrichting voor het uitlezen van een registratiedrager waarop informatie is aangebracht in een optisch uitleesbare structuur.

Publications (1)

Publication Number Publication Date
ZA75374B true ZA75374B (en) 1976-08-25

Family

ID=19820771

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00750374A ZA75374B (en) 1974-02-15 1975-01-20 Apparatus for reading a record carrier on which information is stored in an optically readable structure

Country Status (16)

Country Link
US (1) US3969573A (it)
JP (1) JPS594771B2 (it)
AT (1) AT337791B (it)
BE (1) BE825504A (it)
CA (1) CA1033459A (it)
CH (1) CH582936A5 (it)
DE (1) DE2504209C3 (it)
DK (1) DK136996B (it)
ES (1) ES434686A1 (it)
FR (1) FR2261589B1 (it)
GB (1) GB1499562A (it)
IT (1) IT1031694B (it)
NL (1) NL176314C (it)
NO (1) NO750456L (it)
SE (1) SE395784B (it)
ZA (1) ZA75374B (it)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7506495A (nl) * 1975-06-02 1976-12-06 Philips Nv Inrichting voor het uitlezen van een registratie- drager.
JPS5310407A (en) * 1976-07-16 1978-01-30 Mansei Kogyo Kk Optical information reader
CH613310A5 (it) * 1977-04-01 1979-09-14 Inst Angewandte Physik
US4333173A (en) * 1979-06-15 1982-06-01 Hitachi, Ltd. Optical information processor with prismatic correction of laser beam shape
US4400062A (en) * 1979-09-11 1983-08-23 Sony Corporation Wave plate retarder
FR2483664B1 (fr) * 1980-05-28 1985-06-28 Thomson Csf Dispositif optique d'enregistrement-lecture sur un support d'informations et systeme de memoire optique comprenant un tel dispositif
FR2498341A1 (fr) * 1981-01-20 1982-07-23 Thomson Csf Dispositif optique detecteur d'ecart de focalisation et enregistreur lecteur optique comportant un tel dispositif
JPS58150146A (ja) * 1982-03-02 1983-09-06 Nec Corp 光デイスク用光ピツクアツプ
US4558440A (en) * 1982-08-19 1985-12-10 Canon Kabushiki Kaisha System for recording patterns of magnetically recorded information by utilizing the magneto-optic effect
US4514047A (en) * 1982-10-12 1985-04-30 Magnetic Peripherals Inc. On-axis achromatic quarterwave retarder prism
JP2548104B2 (ja) * 1983-04-20 1996-10-30 松下電器産業株式会社 光学ヘツド
JPS5998329A (ja) * 1983-10-28 1984-06-06 Hitachi Ltd 光情報処理装置
US6328449B1 (en) * 1984-05-03 2001-12-11 The United States Of America As Represented By The Secretary Of The Navy Brewster-angle dispersion filter (U)
JPH0693044B2 (ja) * 1985-03-22 1994-11-16 株式会社日立製作所 プリズム光学系及びそれを用いた情報装置
JP2531626B2 (ja) * 1986-04-10 1996-09-04 オリンパス光学工業株式会社 光学的記録媒体用基盤の光学的特性測定装置
EP0255305B1 (en) * 1986-07-28 1993-01-07 Sharp Kabushiki Kaisha Focusing error detecting device and method of manufacturing the same
GB2203259A (en) * 1987-02-26 1988-10-12 Plessey Co Plc Polarisation rotator associated with reflective surface
US4891799A (en) * 1987-03-13 1990-01-02 Fuji Electrochemical Co., Ltd. Optical head apparatus for writing and reading data on an optical disk having a lens with an inclined optical axis
EP0312652B1 (en) * 1987-10-19 1993-09-01 Hitachi, Ltd. Optical device with phase-locked diodelaser array
CN1043203A (zh) * 1988-12-02 1990-06-20 三井石油化学工业株式会社 光输出控制方法及其装置
US5152597A (en) * 1990-12-03 1992-10-06 Eastman Kodak Company Magneto-optic readout using a polarization-preserving optical fiber

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3829622A (en) * 1972-10-24 1974-08-13 Mca Disco Vision Video disc player with variably biased pneumatic head

Also Published As

Publication number Publication date
CA1033459A (en) 1978-06-20
GB1499562A (en) 1978-02-01
DK51075A (it) 1975-10-13
DE2504209A1 (de) 1975-08-21
JPS594771B2 (ja) 1984-01-31
NO750456L (it) 1975-08-18
US3969573A (en) 1976-07-13
FR2261589A1 (it) 1975-09-12
JPS50119661A (it) 1975-09-19
NL176314B (nl) 1984-10-16
AU7819575A (en) 1976-08-19
NL7402170A (nl) 1975-08-19
AT337791B (de) 1977-07-25
BE825504A (fr) 1975-08-13
NL176314C (nl) 1985-03-18
ATA104275A (de) 1976-11-15
DE2504209B2 (de) 1977-09-29
SE7501525L (it) 1975-08-18
DE2504209C3 (de) 1979-05-23
SE395784B (sv) 1977-08-22
DK136996B (da) 1977-12-27
FR2261589B1 (it) 1978-02-03
IT1031694B (it) 1979-05-10
DK136996C (it) 1978-06-05
ES434686A1 (es) 1977-02-01
CH582936A5 (it) 1976-12-15

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