JPS5788535A - Pickup device - Google Patents

Pickup device

Info

Publication number
JPS5788535A
JPS5788535A JP55164212A JP16421280A JPS5788535A JP S5788535 A JPS5788535 A JP S5788535A JP 55164212 A JP55164212 A JP 55164212A JP 16421280 A JP16421280 A JP 16421280A JP S5788535 A JPS5788535 A JP S5788535A
Authority
JP
Japan
Prior art keywords
light
polarized light
plane
plate
splitter
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
JP55164212A
Other languages
Japanese (ja)
Other versions
JPH0230095B2 (en
Inventor
Yukio Kurata
Kaneki Matsui
Haruhisa Takiguchi
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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Priority to JP55164212A priority Critical patent/JPS5788535A/en
Publication of JPS5788535A publication Critical patent/JPS5788535A/en
Publication of JPH0230095B2 publication Critical patent/JPH0230095B2/ja
Granted 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)
  • Optical Head (AREA)

Abstract

PURPOSE:To improve the tracking control and focusing control performance, by locating a wavelength plate before and after a polarized light beam splitter on an axial line perpendicular to the recording plane of a recording carrier and locating a semiconductor laser and a photodetector oppositely at both the sides of the axial line. CONSTITUTION:An outgoing light of linear polarized light from a semiconductor laser 2 is collimated at an objective lens 3, then converted into a circular polarized light at a 1/4 wavelentgh plate 5 via a beam splitter 6 and condensed on a recording plane 9a of a disc 9 at a lens 4. The light modulated with the information on the plane 9a is converted into a linear polarized light toward the direction perpendicular at the incident time and transmits through the splitter 6. After the transmitted light passes through a 1/4 wave-length plate 11, it is reflected by a mirror 12 and passes through the plate 11 again and becomes a linear polarized light in which the polarized plane turns by 90 deg.. Thus, the incident light to the splitter 6 is reflected toward a detection lens 7 and detected at a photodetector 8.
JP55164212A 1980-11-20 1980-11-20 Pickup device Granted JPS5788535A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55164212A JPS5788535A (en) 1980-11-20 1980-11-20 Pickup device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55164212A JPS5788535A (en) 1980-11-20 1980-11-20 Pickup device

Publications (2)

Publication Number Publication Date
JPS5788535A true JPS5788535A (en) 1982-06-02
JPH0230095B2 JPH0230095B2 (en) 1990-07-04

Family

ID=15788791

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55164212A Granted JPS5788535A (en) 1980-11-20 1980-11-20 Pickup device

Country Status (1)

Country Link
JP (1) JPS5788535A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5959325U (en) * 1982-10-09 1984-04-18 山下印刷紙器株式会社 Water-resistant and non-breathable cardboard
JPS59164940U (en) * 1983-04-20 1984-11-05 三洋電機株式会社 optical pick up
EP0329304A2 (en) * 1988-02-10 1989-08-23 THORN EMI plc Optical recording

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5959325U (en) * 1982-10-09 1984-04-18 山下印刷紙器株式会社 Water-resistant and non-breathable cardboard
JPS6350117Y2 (en) * 1982-10-09 1988-12-22
JPS59164940U (en) * 1983-04-20 1984-11-05 三洋電機株式会社 optical pick up
EP0329304A2 (en) * 1988-02-10 1989-08-23 THORN EMI plc Optical recording
US5097457A (en) * 1988-02-10 1992-03-17 Thorn Emi Plc Optical recording system having a rotating optical element provided therein

Also Published As

Publication number Publication date
JPH0230095B2 (en) 1990-07-04

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