JPS6410436A - Optical pickup device - Google Patents

Optical pickup device

Info

Publication number
JPS6410436A
JPS6410436A JP62166333A JP16633387A JPS6410436A JP S6410436 A JPS6410436 A JP S6410436A JP 62166333 A JP62166333 A JP 62166333A JP 16633387 A JP16633387 A JP 16633387A JP S6410436 A JPS6410436 A JP S6410436A
Authority
JP
Japan
Prior art keywords
light
grating
detecting
coupler
optical system
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
JP62166333A
Other languages
Japanese (ja)
Other versions
JPH0668850B2 (en
Inventor
Ryuichi Katayama
Yutaka Yamanaka
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to JP62166333A priority Critical patent/JPH0668850B2/en
Publication of JPS6410436A publication Critical patent/JPS6410436A/en
Publication of JPH0668850B2 publication Critical patent/JPH0668850B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To reduce the production cost of the titled device by providing a signal detection optical system comprising a thin film waveguide element to an assembled optical system of an optical pickup so as to attain small size and light weight of the device without losing the characteristic of the optical system. CONSTITUTION:A diffraction grating 15 is formed to the side of a face 12a of a transparent base 12 on which a radiated light from a semiconductor laser 1 is made incident and the grating 15 divides the incident light into the 0-th order diffracted light for detecting an information signal and a 1st order diffracted light for detecting a track error signal. The diffracted light is made incident on a recording medium 6 via a collimate lens 4 and an objective lens 5 and the reflected light from the medium 6 is led to the thin film waveguide path 13 via the lenses 5, 4. The waveguide path 13 is arranged on the base 12 and a grating coupler 16 is provided corresponding to the grating 15. The light beam 18b for detecting information signal in the reflected light from the medium 6 and the light beams 18a, 18c for detecting track error signal are led to the waveguide path 13 by the coupler 16 and the tangential direction of the slot in the center of the coupler 16 is made nearly at a right angle to the direction of the slot of the grating 15 to make the size of the device small.
JP62166333A 1987-07-02 1987-07-02 Optical pickup device Expired - Lifetime JPH0668850B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62166333A JPH0668850B2 (en) 1987-07-02 1987-07-02 Optical pickup device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62166333A JPH0668850B2 (en) 1987-07-02 1987-07-02 Optical pickup device

Publications (2)

Publication Number Publication Date
JPS6410436A true JPS6410436A (en) 1989-01-13
JPH0668850B2 JPH0668850B2 (en) 1994-08-31

Family

ID=15829419

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62166333A Expired - Lifetime JPH0668850B2 (en) 1987-07-02 1987-07-02 Optical pickup device

Country Status (1)

Country Link
JP (1) JPH0668850B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5454553A (en) * 1993-04-30 1995-10-03 Hewlett-Packard Company Paper trays for computer driven printer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5454553A (en) * 1993-04-30 1995-10-03 Hewlett-Packard Company Paper trays for computer driven printer

Also Published As

Publication number Publication date
JPH0668850B2 (en) 1994-08-31

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