JPS6161240A - 光学式信号再生装置 - Google Patents

光学式信号再生装置

Info

Publication number
JPS6161240A
JPS6161240A JP18261384A JP18261384A JPS6161240A JP S6161240 A JPS6161240 A JP S6161240A JP 18261384 A JP18261384 A JP 18261384A JP 18261384 A JP18261384 A JP 18261384A JP S6161240 A JPS6161240 A JP S6161240A
Authority
JP
Japan
Prior art keywords
optical
photodetector
parallel plate
reflected
parallel
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
JP18261384A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0447896B2 (enrdf_load_stackoverflow
Inventor
Yoshihiro Katase
片瀬　順弘
Masayuki Inoue
雅之 井上
Toshio Sugiyama
俊夫 杉山
Tadashi Okuda
正 奥田
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP18261384A priority Critical patent/JPS6161240A/ja
Publication of JPS6161240A publication Critical patent/JPS6161240A/ja
Publication of JPH0447896B2 publication Critical patent/JPH0447896B2/ja
Granted legal-status Critical Current

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
    • G11B7/0908—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 for focusing only

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)
JP18261384A 1984-09-03 1984-09-03 光学式信号再生装置 Granted JPS6161240A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18261384A JPS6161240A (ja) 1984-09-03 1984-09-03 光学式信号再生装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18261384A JPS6161240A (ja) 1984-09-03 1984-09-03 光学式信号再生装置

Publications (2)

Publication Number Publication Date
JPS6161240A true JPS6161240A (ja) 1986-03-29
JPH0447896B2 JPH0447896B2 (enrdf_load_stackoverflow) 1992-08-05

Family

ID=16121348

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18261384A Granted JPS6161240A (ja) 1984-09-03 1984-09-03 光学式信号再生装置

Country Status (1)

Country Link
JP (1) JPS6161240A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61202339A (ja) * 1985-03-05 1986-09-08 Konishiroku Photo Ind Co Ltd 光ピツクアツプ
JPS61236035A (ja) * 1985-04-09 1986-10-21 Sony Corp 光学ヘツド

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4916823A (enrdf_load_stackoverflow) * 1972-04-20 1974-02-14
JPS5439101A (en) * 1977-08-30 1979-03-26 Olympus Optical Co Ltd Automatic focusing method
JPS5657013A (en) * 1979-09-28 1981-05-19 Philips Nv Focus error detector
JPS57205833A (en) * 1981-06-12 1982-12-17 Sony Corp Optical reproducing device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4916823A (enrdf_load_stackoverflow) * 1972-04-20 1974-02-14
JPS5439101A (en) * 1977-08-30 1979-03-26 Olympus Optical Co Ltd Automatic focusing method
JPS5657013A (en) * 1979-09-28 1981-05-19 Philips Nv Focus error detector
JPS57205833A (en) * 1981-06-12 1982-12-17 Sony Corp Optical reproducing device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61202339A (ja) * 1985-03-05 1986-09-08 Konishiroku Photo Ind Co Ltd 光ピツクアツプ
JPS61236035A (ja) * 1985-04-09 1986-10-21 Sony Corp 光学ヘツド

Also Published As

Publication number Publication date
JPH0447896B2 (enrdf_load_stackoverflow) 1992-08-05

Similar Documents

Publication Publication Date Title
JPS629537A (ja) 光学式ピツクアツプ装置
JP2633535B2 (ja) 光学ピツクアツプ装置
US20070183279A1 (en) Apparatus for optically recording and reproducing information
JPS60182526A (ja) 光学式情報処理装置
KR100213270B1 (ko) 양면 디스크용 광 픽업
US5144131A (en) Device for optically scanning an information plane detecting border portions of light beam
JPS63285732A (ja) 光学式ピックアップ装置
JPS6322370B2 (enrdf_load_stackoverflow)
JPS6161240A (ja) 光学式信号再生装置
JPS62137736A (ja) 光ヘツド装置
US4954702A (en) Process for detecting a focal point in an optical head
JPS6297144A (ja) 光ピツクアツプ
JP2636245B2 (ja) 光磁気記憶用光ヘッド
JPS63291238A (ja) 光メモリ−装置
JPS63291219A (ja) 光ピックアップの光学系
KR100421011B1 (ko) 다각형의 프리즘을 구비한 광픽업장치 및 이를 이용한광축보정방법
JPH0138561Y2 (enrdf_load_stackoverflow)
JPH04209335A (ja) 発光部材
JPH0519853Y2 (enrdf_load_stackoverflow)
JPS63140426A (ja) 光ピツクアツプ装置
JPS62217425A (ja) 光ヘツド装置
KR100339345B1 (ko) 광픽업장치
JP2578203B2 (ja) 光ヘッド
JPS5933643A (ja) 光ピツクアツプ
JPS59231738A (ja) 光ピツクアツプ

Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term