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JPS6361431A - Optical pickup - Google Patents

Optical pickup

Info

Publication number
JPS6361431A
JPS6361431A JP20625886A JP20625886A JPS6361431A JP S6361431 A JPS6361431 A JP S6361431A JP 20625886 A JP20625886 A JP 20625886A JP 20625886 A JP20625886 A JP 20625886A JP S6361431 A JPS6361431 A JP S6361431A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
optical
pickup
reflected
error
lens
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
JP20625886A
Inventor
Hiroshi Nishihara
Toshiaki Suhara
Hiroshi Sunakawa
Original Assignee
Fuji Photo Film 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 miniaturize an optical pickup, and to make it light weight, by detecting a reflected beam from an optical recording medium passing through a grating lens, by a photodetector which reads a bit of recording information, detects a tracking error, and detects a focus error.
CONSTITUTION: On the optical pickup, a block 12 formed in such a way that it can be moved freely along rods 11, 11 extending in a direction almost vertical to a paper plane, is provided. In the block 12, a semiconductor laser 16 which emits a light beam 15 to the reflecting plane of an optical disk 13, is provided. The grating lens 22 is arranged setting the surface of the lens so as to receive a reflected beam 15' reflected on the disk 13. The lens 22 is formed by providing condensing diffraction gratings 31 and 32 adjacent to each other on a transparent member 23. Furthermore, on the block 12, the photodetectors 24 and 25 which detect a diffracted and condensed reflected beam 15'. In this way, it is possible to miniaturize the optical pickup, and to make it light weight, and to make the pickup read the bit of recording information, detect the tracking error, and perform the detection of the focus error.
COPYRIGHT: (C)1988,JPO&Japio
JP20625886A 1986-09-02 1986-09-02 Optical pickup Pending JPS6361431A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20625886A JPS6361431A (en) 1986-09-02 1986-09-02 Optical pickup

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP20625886A JPS6361431A (en) 1986-09-02 1986-09-02 Optical pickup
DE19873785118 DE3785118T2 (en) 1986-09-02 1987-09-02 An optical reproducing head.
US07092256 US4885732A (en) 1986-09-02 1987-09-02 Optical pickup apparatus for detecting and correcting focusing and tracking errors in detected recorded signals
EP19870112831 EP0258890B1 (en) 1986-09-02 1987-09-02 Optical pickup apparatus
DE19873785118 DE3785118D1 (en) 1986-09-02 1987-09-02 An optical reproducing head.

Publications (1)

Publication Number Publication Date
JPS6361431A true true JPS6361431A (en) 1988-03-17

Family

ID=16520352

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20625886A Pending JPS6361431A (en) 1986-09-02 1986-09-02 Optical pickup

Country Status (1)

Country Link
JP (1) JPS6361431A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02124435A (en) * 1988-07-06 1990-05-11 Kuraray Co Ltd Peak wavelength detector, light-source selecting apparatus provided with said detector and peak-wavelength detecting method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5010151A (en) * 1973-05-24 1975-02-01

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5010151A (en) * 1973-05-24 1975-02-01

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02124435A (en) * 1988-07-06 1990-05-11 Kuraray Co Ltd Peak wavelength detector, light-source selecting apparatus provided with said detector and peak-wavelength detecting method

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