JPH04289541A - Magneto-optical pickup device - Google Patents

Magneto-optical pickup device

Info

Publication number
JPH04289541A
JPH04289541A JP150191A JP150191A JPH04289541A JP H04289541 A JPH04289541 A JP H04289541A JP 150191 A JP150191 A JP 150191A JP 150191 A JP150191 A JP 150191A JP H04289541 A JPH04289541 A JP H04289541A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
light
photodetector
parallel plane
reflected
transmitted
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.)
Withdrawn
Application number
JP150191A
Inventor
Yutaka Ishiwatari
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

Links

Abstract

PURPOSE: To improve the workability to easily reduce the production cost by making a light beam accurately incident on a photodetector without accurate alignment of a polarizing beam splitter and the photodetector.
CONSTITUTION: With respect to a photomagnetic signal detecting element 18, a polarized light selecting film 32 is provided between first and second parallel plane plates 28 and 30 to constitute a polarizing beam splitter 40, and this polarizing beam splitter is provided with photodetectors 24 and 26. The reflected light from a magneto-optical disk 10 passes a through hole 22 of a semiconductor substrate 20 and is transmitted through the first parallel plane plate 28, and a part of this light is transmitted through the second parallel plane plate 30 as it is, but the other part is reflected by the polarized light selecting film 32. The reflected light is made incident on the photodetector 24. The light transmitted through the second parallel plane plate is reflected by a reflection film 34 and is made incident on the photodetector 26.
COPYRIGHT: (C)1992,JPO&Japio
JP150191A 1991-01-10 1991-01-10 Magneto-optical pickup device Withdrawn JPH04289541A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP150191A JPH04289541A (en) 1991-01-10 1991-01-10 Magneto-optical pickup device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP150191A JPH04289541A (en) 1991-01-10 1991-01-10 Magneto-optical pickup device

Publications (1)

Publication Number Publication Date
JPH04289541A true true JPH04289541A (en) 1992-10-14

Family

ID=11503214

Family Applications (1)

Application Number Title Priority Date Filing Date
JP150191A Withdrawn JPH04289541A (en) 1991-01-10 1991-01-10 Magneto-optical pickup device

Country Status (1)

Country Link
JP (1) JPH04289541A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0840305A2 (en) * 1991-12-27 1998-05-06 Sony Corporation Optical apparatus
US5796701A (en) * 1995-06-23 1998-08-18 Sony Corporation Optical pickup and opto-magnetic signal reproducing apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0840305A2 (en) * 1991-12-27 1998-05-06 Sony Corporation Optical apparatus
EP0840305A3 (en) * 1991-12-27 1999-01-27 Sony Corporation Optical apparatus
US5796701A (en) * 1995-06-23 1998-08-18 Sony Corporation Optical pickup and opto-magnetic signal reproducing apparatus

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Legal Events

Date Code Title Description
A300 Withdrawal of application because of no request for examination

Free format text: JAPANESE INTERMEDIATE CODE: A300

Effective date: 19980514