JPH03230324A - Optical pickup device - Google Patents

Optical pickup device

Info

Publication number
JPH03230324A
JPH03230324A JP2023755A JP2375590A JPH03230324A JP H03230324 A JPH03230324 A JP H03230324A JP 2023755 A JP2023755 A JP 2023755A JP 2375590 A JP2375590 A JP 2375590A JP H03230324 A JPH03230324 A JP H03230324A
Authority
JP
Japan
Prior art keywords
light beams
prism
pickup device
detecting
optical pickup
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
JP2023755A
Other languages
Japanese (ja)
Inventor
Masahiko Nakayama
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP2023755A priority Critical patent/JPH03230324A/en
Publication of JPH03230324A publication Critical patent/JPH03230324A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To optionally control an interval between optical spots on a photodetecting element by arranging a 2nd Foucault prism between a 1st Foucault prism for dividing reflected light from a recording medium into two light beams and the photo detecting element for detecting the two light beams.
CONSTITUTION: The 2nd Foucault prism 8 is arranged between the 1st Foucault prism 7 for dividing reflected light from the recording medium 5 into two light beams and the two-dividing photodetecting element 9 for detecting the two divided light beams. The interval between two optical spots formed on the element 9 from the two light beams divided by the prism 7 can be optionally controlled by the shape or position of the prism 8. Consequently, the photodetecting element 9 can be made compact and the size and weight of an optical pickup device can be reduced.
COPYRIGHT: (C)1991,JPO&Japio
JP2023755A 1990-02-02 1990-02-02 Optical pickup device Pending JPH03230324A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2023755A JPH03230324A (en) 1990-02-02 1990-02-02 Optical pickup device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2023755A JPH03230324A (en) 1990-02-02 1990-02-02 Optical pickup device

Publications (1)

Publication Number Publication Date
JPH03230324A true JPH03230324A (en) 1991-10-14

Family

ID=12119143

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2023755A Pending JPH03230324A (en) 1990-02-02 1990-02-02 Optical pickup device

Country Status (1)

Country Link
JP (1) JPH03230324A (en)

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