KR890008764A - 포커스 광검출 장치 - Google Patents

포커스 광검출 장치 Download PDF

Info

Publication number
KR890008764A
KR890008764A KR1019880012177A KR880012177A KR890008764A KR 890008764 A KR890008764 A KR 890008764A KR 1019880012177 A KR1019880012177 A KR 1019880012177A KR 880012177 A KR880012177 A KR 880012177A KR 890008764 A KR890008764 A KR 890008764A
Authority
KR
South Korea
Prior art keywords
detector
focus photodetector
substrate
focus
photodetector
Prior art date
Application number
KR1019880012177A
Other languages
English (en)
Korean (ko)
Inventor
미찌오 오까
Original Assignee
오오가노리오
소니 가부시끼 가이샤
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 오오가노리오, 소니 가부시끼 가이샤 filed Critical 오오가노리오
Publication of KR890008764A publication Critical patent/KR890008764A/ko

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
KR1019880012177A 1987-11-28 1988-09-21 포커스 광검출 장치 KR890008764A (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP301269 1987-11-28
JP62301269A JP2605760B2 (ja) 1987-11-28 1987-11-28 フォーカス検出装置

Publications (1)

Publication Number Publication Date
KR890008764A true KR890008764A (ko) 1989-07-12

Family

ID=17894783

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019880012177A KR890008764A (ko) 1987-11-28 1988-09-21 포커스 광검출 장치

Country Status (2)

Country Link
JP (1) JP2605760B2 (ja)
KR (1) KR890008764A (ja)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03192541A (ja) * 1989-12-21 1991-08-22 Nec Corp 光ヘッド装置

Also Published As

Publication number Publication date
JP2605760B2 (ja) 1997-04-30
JPH01143026A (ja) 1989-06-05

Similar Documents

Publication Publication Date Title
KR870004426A (ko) 광 주사 장치
KR840001718A (ko) 극미소 수술용 레이저
KR870010499A (ko) 광학헤드
KR900004041A (ko) 반도체 발광장치 및 그 응용제품
KR900006921A (ko) 광픽업장치
FR2646245B1 (fr) Dispositif de lecture optique pour support d'enregistrement optique
FI883280A (fi) Optinen järjestelmä kohteen kaarevuuden muutoksen määrittämiseksi mitoiltaan pienellä alueella
KR910001670A (ko) 광학픽업장치
KR900010683A (ko) 광 검출 장치
KR840009165A (ko) 광학 디스크 플레이어
KR890008764A (ko) 포커스 광검출 장치
KR880008258A (ko) 광학 픽업 장치
KR830006677A (ko) 적외선 막 두께측정기
JPS6455746A (en) Optical pickup device
KR950015238A (ko) 포커스 에러 검출장치
KR960025411A (ko) 양면 디스크용 광 픽업
KR970017245A (ko) 듀얼 포커스 광 픽업장치
KR960038790A (ko) 광디스크의 두께를 이용한 정보 기록 재생 장치
JPS5768811A (en) Beam condensing device
KR890017566A (ko) 광파장 변환장치
KR890017669A (ko) 광학식 픽업에 있어서의 비임 스플릿터의 고정구조
KR860008633A (ko) 반도체 레이저 장치
KR950015239A (ko) 포커스 에러 검출장치
KR860008531A (ko) 광학식 헤드의 트랙킹 오차 검출장치
KR860008632A (ko) 반도체 레이저 장치

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application