JPS578929A - Optical pickup device - Google Patents

Optical pickup device

Info

Publication number
JPS578929A
JPS578929A JP12005380A JP12005380A JPS578929A JP S578929 A JPS578929 A JP S578929A JP 12005380 A JP12005380 A JP 12005380A JP 12005380 A JP12005380 A JP 12005380A JP S578929 A JPS578929 A JP S578929A
Authority
JP
Japan
Prior art keywords
lens
lambda
plate
lens barrel
stop
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
JP12005380A
Other languages
Japanese (ja)
Inventor
Keiichi Yoshizumi
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 JP12005380A priority Critical patent/JPS578929A/en
Publication of JPS578929A publication Critical patent/JPS578929A/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

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)

Abstract

PURPOSE:To eliminate influences of the aberration of a lens in tracking and focusing and the coma aberration due to the protective layer of a disk, by moving parallel light in a lens barrel consisting of a polarizing prism, a lambda/4 plate and a stop-down lens. CONSTITUTION:Parallel light generated by a semiconductor laser and a compound lens 2 is stopped down on the recording surface of a disk 6 through a polarizing prism 3, a lambda/4 plate 4, and a stop-down lens 5, and the light reflected on the recording surface passed through the lens 5 and lambda/4 plate 6 and changed in direction by 90 deg. through the polarizing prism 3 to reach a concave mirror 8 via a lambda/4 plate 7, so that it reaches a photodetecting element 9 by being reflected and focused. Even when a lens barrel 10 is moved up and down, right and left, and back and forth in parallel, the optical path in the lens barrel does not shift at all including the state of a wave surface, and out of focus, a shift in tracking, the aberration of the stop-down lens, etc., due to the oscillation of the lens barrel 10 are avoided.
JP12005380A 1980-08-29 1980-08-29 Optical pickup device Pending JPS578929A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12005380A JPS578929A (en) 1980-08-29 1980-08-29 Optical pickup device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12005380A JPS578929A (en) 1980-08-29 1980-08-29 Optical pickup device

Publications (1)

Publication Number Publication Date
JPS578929A true JPS578929A (en) 1982-01-18

Family

ID=14776718

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12005380A Pending JPS578929A (en) 1980-08-29 1980-08-29 Optical pickup device

Country Status (1)

Country Link
JP (1) JPS578929A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58153238A (en) * 1982-03-05 1983-09-12 Ricoh Co Ltd Tracking method
JPS5968833A (en) * 1982-10-14 1984-04-18 Nec Corp Controller of tracking position
JPS59146460A (en) * 1983-02-10 1984-08-22 Olympus Optical Co Ltd Pickup for optical disk
JPS59164940U (en) * 1983-04-20 1984-11-05 三洋電機株式会社 optical pick up
JPS6093647A (en) * 1983-10-28 1985-05-25 Asahi Optical Co Ltd Reproducing optical system control means of optical type disc player
JPS6145724U (en) * 1985-07-09 1986-03-26 パイオニア株式会社 Pickup device for optical information reading device
JPS621141A (en) * 1985-06-27 1987-01-07 Matsushita Electric Ind Co Ltd Optical head
JPS6239232U (en) * 1985-08-26 1987-03-09

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58153238A (en) * 1982-03-05 1983-09-12 Ricoh Co Ltd Tracking method
JPS5968833A (en) * 1982-10-14 1984-04-18 Nec Corp Controller of tracking position
JPS6331859B2 (en) * 1982-10-14 1988-06-27 Nippon Electric Co
JPS59146460A (en) * 1983-02-10 1984-08-22 Olympus Optical Co Ltd Pickup for optical disk
JPS59164940U (en) * 1983-04-20 1984-11-05 三洋電機株式会社 optical pick up
JPS6093647A (en) * 1983-10-28 1985-05-25 Asahi Optical Co Ltd Reproducing optical system control means of optical type disc player
JPS621141A (en) * 1985-06-27 1987-01-07 Matsushita Electric Ind Co Ltd Optical head
JPS6145724U (en) * 1985-07-09 1986-03-26 パイオニア株式会社 Pickup device for optical information reading device
JPS6239232U (en) * 1985-08-26 1987-03-09

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