JPS6435737A - Optical head device - Google Patents

Optical head device

Info

Publication number
JPS6435737A
JPS6435737A JP62191641A JP19164187A JPS6435737A JP S6435737 A JPS6435737 A JP S6435737A JP 62191641 A JP62191641 A JP 62191641A JP 19164187 A JP19164187 A JP 19164187A JP S6435737 A JPS6435737 A JP S6435737A
Authority
JP
Japan
Prior art keywords
gratings
disk
optical path
receiving elements
light receiving
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
JP62191641A
Other languages
Japanese (ja)
Other versions
JP2590904B2 (en
Inventor
Hiroshi Oikami
Hidehiro Kume
Koji Mimori
Yoshiyuki Matsumoto
Etsushi Yamamoto
Hiroshi Yoshitoshi
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.)
Sony Corp
Original Assignee
Sony 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=16278035&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=JPS6435737(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Sony Corp filed Critical Sony Corp
Priority to JP62191641A priority Critical patent/JP2590904B2/en
Publication of JPS6435737A publication Critical patent/JPS6435737A/en
Application granted granted Critical
Publication of JP2590904B2 publication Critical patent/JP2590904B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To detect the three beam system of a planar type without using a beam splitter by radiating the beam on a disk through first and a second diffraction gratings in which the arrangement directions of the gratings are mutually crossed and making a reflected light incident on first and a second light receiving elements having an optical path difference through the second diffraction grating. CONSTITUTION:The beam from a light emitting element 5 is radiated on the disk 19 through the first and the second diffraction gratings 12, 13 disposed so as to cross the arrangement directions of the gratings mutually and an outgoing light from the disk 19 is made incident on the first and the second light receiving elements 9, 10 having the optical path difference through the second diffraction grating 13. The six beams in a return beam are divided into two groups of three beams, supplied to the first and the second light receiving elements 9, 10 disposed at the positions mutually different in the optical path length to obtain a focussing and tracking error signal and a RF signal, thereby, the three beam system of the planar type can be detected without using the beam splitter.
JP62191641A 1987-07-31 1987-07-31 Optical head device Expired - Lifetime JP2590904B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62191641A JP2590904B2 (en) 1987-07-31 1987-07-31 Optical head device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62191641A JP2590904B2 (en) 1987-07-31 1987-07-31 Optical head device

Publications (2)

Publication Number Publication Date
JPS6435737A true JPS6435737A (en) 1989-02-06
JP2590904B2 JP2590904B2 (en) 1997-03-19

Family

ID=16278035

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62191641A Expired - Lifetime JP2590904B2 (en) 1987-07-31 1987-07-31 Optical head device

Country Status (1)

Country Link
JP (1) JP2590904B2 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02265036A (en) * 1989-04-05 1990-10-29 Olympus Optical Co Ltd Optical head
JPH0364701A (en) * 1989-08-03 1991-03-20 Arisawa Mfg Co Ltd Lenticular lens and production thereof
EP0448982A1 (en) * 1990-03-01 1991-10-02 Dr. Johannes Heidenhain GmbH Position measuring device
JPH0573953A (en) * 1991-09-18 1993-03-26 Nec Corp Optical recording and reproducing device
JPH05197999A (en) * 1991-09-18 1993-08-06 Nec Corp Optical recording and reproducing device and production thereof
EP0617420A1 (en) * 1993-03-26 1994-09-28 Matsushita Electronics Corporation Optical head
US5608708A (en) * 1994-06-07 1997-03-04 U.S. Philips Corporation Optical beam-splitting element
US6108138A (en) * 1994-06-07 2000-08-22 U.S. Philips Corporation Optical beam shaper, and radiation source unit and scanning device including said beam shaper
EP0981063A3 (en) * 1992-07-14 2003-09-17 Seiko Epson Corporation Polarizer, optical element, and optical head

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02265036A (en) * 1989-04-05 1990-10-29 Olympus Optical Co Ltd Optical head
JPH0364701A (en) * 1989-08-03 1991-03-20 Arisawa Mfg Co Ltd Lenticular lens and production thereof
EP0448982A1 (en) * 1990-03-01 1991-10-02 Dr. Johannes Heidenhain GmbH Position measuring device
US5206704A (en) * 1990-03-01 1993-04-27 Dr. Johannes Heidenhain Gmbh Position measuring apparatus and method of use thereof
JPH0573953A (en) * 1991-09-18 1993-03-26 Nec Corp Optical recording and reproducing device
JPH05197999A (en) * 1991-09-18 1993-08-06 Nec Corp Optical recording and reproducing device and production thereof
EP0981063A3 (en) * 1992-07-14 2003-09-17 Seiko Epson Corporation Polarizer, optical element, and optical head
EP0617420A1 (en) * 1993-03-26 1994-09-28 Matsushita Electronics Corporation Optical head
US5517479A (en) * 1993-03-26 1996-05-14 Matsushita Electronics Corporation Optical head including a semiconductor laser having a non-scatter incident area
US5729519A (en) * 1993-03-26 1998-03-17 Matsushita Electronics Corporation Optical head including a semiconductor laser having a non-scatter area to diffuse incident light beams
US5608708A (en) * 1994-06-07 1997-03-04 U.S. Philips Corporation Optical beam-splitting element
US6108138A (en) * 1994-06-07 2000-08-22 U.S. Philips Corporation Optical beam shaper, and radiation source unit and scanning device including said beam shaper

Also Published As

Publication number Publication date
JP2590904B2 (en) 1997-03-19

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