JPS55163636A - Optical recorder/reproducer - Google Patents

Optical recorder/reproducer

Info

Publication number
JPS55163636A
JPS55163636A JP7172479A JP7172479A JPS55163636A JP S55163636 A JPS55163636 A JP S55163636A JP 7172479 A JP7172479 A JP 7172479A JP 7172479 A JP7172479 A JP 7172479A JP S55163636 A JPS55163636 A JP S55163636A
Authority
JP
Japan
Prior art keywords
plate
reflected light
lens
light
detector
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.)
Granted
Application number
JP7172479A
Other languages
Japanese (ja)
Other versions
JPS606016B2 (en
Inventor
Toshio Sato
Tomio Yoshida
Akifumi Nakada
Shunji Harikae
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP54071724A priority Critical patent/JPS606016B2/en
Publication of JPS55163636A publication Critical patent/JPS55163636A/en
Publication of JPS606016B2 publication Critical patent/JPS606016B2/en
Expired 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

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE:To ensure the steady recording and reproduction of the information, by installing with an inclination the lambda/4 plate after the rear cylindrical lens. CONSTITUTION:The lambda/4 plate 6 is installed at the back of convex cylindrical lens 7, and thus reflected light l3' sent from lens 7 is not irradiated to optical detector 11. This is due to the fact that the reflected light from lens 7 does not pass through plate 6 and thus transmits through polarized beam splitter 5 without being reflected toward detector 11. Thus the floating light from lens 7 can be prevented, but the consideration must be given to the reflected light from plate 6 itself. No problem occurs to the reflected light from front surface H of plate 6, but reflected light l4' from back surface I is irradiated to detector 11 to be turned into the floating light. In this connection, plate 6 is tilted by angle theta in order to avoid detection of light l4'. The angle theta is set preferably 2-5 deg..
JP54071724A 1979-06-06 1979-06-06 optical recording and reproducing device Expired JPS606016B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54071724A JPS606016B2 (en) 1979-06-06 1979-06-06 optical recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54071724A JPS606016B2 (en) 1979-06-06 1979-06-06 optical recording and reproducing device

Publications (2)

Publication Number Publication Date
JPS55163636A true JPS55163636A (en) 1980-12-19
JPS606016B2 JPS606016B2 (en) 1985-02-15

Family

ID=13468747

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54071724A Expired JPS606016B2 (en) 1979-06-06 1979-06-06 optical recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS606016B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6040538A (en) * 1983-08-15 1985-03-02 Toshiba Corp Optical information reader
US8857199B2 (en) 2008-09-22 2014-10-14 Panasonic Healthcare Co., Ltd. Refrigerating apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6040538A (en) * 1983-08-15 1985-03-02 Toshiba Corp Optical information reader
US8857199B2 (en) 2008-09-22 2014-10-14 Panasonic Healthcare Co., Ltd. Refrigerating apparatus

Also Published As

Publication number Publication date
JPS606016B2 (en) 1985-02-15

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