JPS5733443A - Focus detector - Google Patents

Focus detector

Info

Publication number
JPS5733443A
JPS5733443A JP10635380A JP10635380A JPS5733443A JP S5733443 A JPS5733443 A JP S5733443A JP 10635380 A JP10635380 A JP 10635380A JP 10635380 A JP10635380 A JP 10635380A JP S5733443 A JPS5733443 A JP S5733443A
Authority
JP
Japan
Prior art keywords
prism
face
disk
polarized
made incident
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
JP10635380A
Other languages
English (en)
Japanese (ja)
Other versions
JPS639305B2 (US07179912-20070220-C00144.png
Inventor
Toru Musha
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.)
Olympus Corp
Original Assignee
Olympus Optical 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 Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP10635380A priority Critical patent/JPS5733443A/ja
Publication of JPS5733443A publication Critical patent/JPS5733443A/ja
Publication of JPS639305B2 publication Critical patent/JPS639305B2/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)
JP10635380A 1980-08-04 1980-08-04 Focus detector Granted JPS5733443A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10635380A JPS5733443A (en) 1980-08-04 1980-08-04 Focus detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10635380A JPS5733443A (en) 1980-08-04 1980-08-04 Focus detector

Publications (2)

Publication Number Publication Date
JPS5733443A true JPS5733443A (en) 1982-02-23
JPS639305B2 JPS639305B2 (US07179912-20070220-C00144.png) 1988-02-26

Family

ID=14431405

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10635380A Granted JPS5733443A (en) 1980-08-04 1980-08-04 Focus detector

Country Status (1)

Country Link
JP (1) JPS5733443A (US07179912-20070220-C00144.png)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0288801A (ja) * 1988-09-24 1990-03-29 Haiteku Mokuzai Sangyo Kk 路面等の舗装方法
JPH02120504U (US07179912-20070220-C00144.png) * 1989-03-14 1990-09-28

Also Published As

Publication number Publication date
JPS639305B2 (US07179912-20070220-C00144.png) 1988-02-26

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