JPS57111838A - Optical information reader - Google Patents

Optical information reader

Info

Publication number
JPS57111838A
JPS57111838A JP55188794A JP18879480A JPS57111838A JP S57111838 A JPS57111838 A JP S57111838A JP 55188794 A JP55188794 A JP 55188794A JP 18879480 A JP18879480 A JP 18879480A JP S57111838 A JPS57111838 A JP S57111838A
Authority
JP
Japan
Prior art keywords
track
intensity
crosstalk
angled
information
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.)
Pending
Application number
JP55188794A
Other languages
English (en)
Japanese (ja)
Inventor
Masaaki Yamamoto
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.)
Olympus Corp
Original Assignee
Olympus Corp
Olympus Optical Co Ltd
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 Olympus Corp, Olympus Optical Co Ltd filed Critical Olympus Corp
Priority to JP55188794A priority Critical patent/JPS57111838A/ja
Priority to DE3151158A priority patent/DE3151158C2/de
Priority to FR8124331A priority patent/FR2497380A1/fr
Publication of JPS57111838A publication Critical patent/JPS57111838A/ja
Priority to US06/622,395 priority patent/US4633457A/en
Pending 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
    • G11B7/08—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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
  • Optical Recording Or Reproduction (AREA)
JP55188794A 1980-12-27 1980-12-27 Optical information reader Pending JPS57111838A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP55188794A JPS57111838A (en) 1980-12-27 1980-12-27 Optical information reader
DE3151158A DE3151158C2 (de) 1980-12-27 1981-12-23 Optisches Informationslesegerät
FR8124331A FR2497380A1 (fr) 1980-12-27 1981-12-28 Appareil de lecture d'informations optiques
US06/622,395 US4633457A (en) 1980-12-27 1984-06-20 Optical information reading apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55188794A JPS57111838A (en) 1980-12-27 1980-12-27 Optical information reader

Publications (1)

Publication Number Publication Date
JPS57111838A true JPS57111838A (en) 1982-07-12

Family

ID=16229907

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55188794A Pending JPS57111838A (en) 1980-12-27 1980-12-27 Optical information reader

Country Status (4)

Country Link
US (1) US4633457A (enExample)
JP (1) JPS57111838A (enExample)
DE (1) DE3151158C2 (enExample)
FR (1) FR2497380A1 (enExample)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US5161134A (en) * 1989-06-29 1992-11-03 Digital Equipment Corporation Method for increasing linear bit density in magneto-optical storage media
US10134438B2 (en) 2013-06-28 2018-11-20 Sony Corporation Optical medium reproduction apparatus and method of reproducing optical medium
JP6167918B2 (ja) * 2013-08-14 2017-07-26 ソニー株式会社 光媒体再生装置および光媒体再生方法
EP3035332B1 (en) 2013-08-14 2021-04-07 Sony Corporation Optical medium reproduction device and optical medium reproduction method
JP6123821B2 (ja) * 2015-02-12 2017-05-10 ソニー株式会社 光媒体再生装置及び光媒体再生方法

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2266932B1 (enExample) * 1973-03-02 1977-09-02 Thomson Brandt
NL177157C (nl) * 1975-02-28 1985-08-01 Philips Nv Inrichting voor het uitlezen van een vlakke registratiedrager met een optisch uitleesbare informatiestruktuur.
NL7612070A (nl) * 1975-10-31 1977-05-03 Hitachi Ltd Inrichting voor het uitlezen van informatie.
JPS5266405A (en) * 1975-11-29 1977-06-01 Victor Co Of Japan Ltd Optical recording system of information recording discs
NL7608561A (nl) * 1976-08-02 1978-02-06 Philips Nv Optische uitleeseenheid voor het aftasten van een registratiedrager voorzien van een stra- lingsreflekterende informatiestruktuur.
JPS5363002A (en) * 1976-11-18 1978-06-06 Sony Corp Signal recording system and disk type medium for recording signal
US4235507A (en) * 1977-09-16 1980-11-25 Hitachi, Ltd. Optical system to condense light from a semiconductor laser into a circular spot
US4209793A (en) * 1977-12-17 1980-06-24 Victor Company Of Japan, Limited Apparatus for optically recording signals on a recording medium
US4179708A (en) * 1978-02-27 1979-12-18 Rca Corporation Optical playback system having increased depth-of-field
US4272651A (en) * 1978-04-28 1981-06-09 Matsushita Electric Industrial Co., Ltd. Optical system having diode laser light source
US4198701A (en) * 1978-05-23 1980-04-15 Harris Corporation of Cleveland, Ohio Digital optical recorder-reproducer system
US4310910A (en) * 1978-09-19 1982-01-12 Rca Corporation Optimal polarization for the optical readout of high density video recording
JPS55106414A (en) * 1979-02-09 1980-08-15 Matsushita Electric Ind Co Ltd Aperture optical device of semiconductor laser beam
NL7906576A (nl) * 1979-09-03 1981-03-05 Philips Nv Registratiedrager waarin informatie is aangebracht in een optisch uitleesbare informatiestruktuur, alsmede uitleesinrichting daarvoor.
US4375096A (en) * 1981-03-10 1983-02-22 Rca Corporation Multi-bandwidth optical playback apparatus with elongated read spot

Also Published As

Publication number Publication date
US4633457A (en) 1986-12-30
FR2497380B1 (enExample) 1985-01-04
FR2497380A1 (fr) 1982-07-02
DE3151158A1 (de) 1982-07-08
DE3151158C2 (de) 1985-08-08

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