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JPS54148502A - Optical recorder-reproducer - Google Patents

Optical recorder-reproducer

Info

Publication number
JPS54148502A
JPS54148502A JP5649578A JP5649578A JPS54148502A JP S54148502 A JPS54148502 A JP S54148502A JP 5649578 A JP5649578 A JP 5649578A JP 5649578 A JP5649578 A JP 5649578A JP S54148502 A JPS54148502 A JP S54148502A
Authority
JP
Japan
Prior art keywords
objective lenses
holograms
thru
central part
lenses
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
JP5649578A
Other languages
Japanese (ja)
Inventor
Kiichi Kato
Masaharu Sakamoto
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 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 Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP5649578A priority Critical patent/JPS54148502A/en
Publication of JPS54148502A publication Critical patent/JPS54148502A/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
    • G11B7/12—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

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Holo Graphy (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To form good writing-reading light spots with a simple constitution by disposing holograms in the central part of a rotary disc provided with objective lenses. CONSTITUTION:In the central part of a rotary disc 2 provided with objective lenses 42 thru 45 at the peripheral part are disposed the holograms 41... which have been corrected of the mounting positions of the respective lens and aberration information. These are then radiated by the laser light from a laser 8 passed through collimator lens 46. This causes the reproduction laser light going toward the fixed direction irrespective of the deviation of the incident light to be reflected by a reflecting mirror 11 and to form its image at the specified position on a recording plate 1 through the lenses 42 thru 45 of the disc 2. Hence, the need for highly accurate objective lenses or the like requiring mounting accuracy is eliminated.
JP5649578A 1978-05-15 1978-05-15 Optical recorder-reproducer Pending JPS54148502A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5649578A JPS54148502A (en) 1978-05-15 1978-05-15 Optical recorder-reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5649578A JPS54148502A (en) 1978-05-15 1978-05-15 Optical recorder-reproducer

Publications (1)

Publication Number Publication Date
JPS54148502A true JPS54148502A (en) 1979-11-20

Family

ID=13028669

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5649578A Pending JPS54148502A (en) 1978-05-15 1978-05-15 Optical recorder-reproducer

Country Status (1)

Country Link
JP (1) JPS54148502A (en)

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