JPH0339337B2 - - Google Patents

Info

Publication number
JPH0339337B2
JPH0339337B2 JP11939083A JP11939083A JPH0339337B2 JP H0339337 B2 JPH0339337 B2 JP H0339337B2 JP 11939083 A JP11939083 A JP 11939083A JP 11939083 A JP11939083 A JP 11939083A JP H0339337 B2 JPH0339337 B2 JP H0339337B2
Authority
JP
Japan
Prior art keywords
light
lens
objective lens
defocus
focus
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.)
Expired
Application number
JP11939083A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6010426A (ja
Inventor
Hideo Ando
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.)
Toshiba Corp
Original Assignee
Tokyo Shibaura Electric 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 Tokyo Shibaura Electric Co Ltd filed Critical Tokyo Shibaura Electric Co Ltd
Priority to JP11939083A priority Critical patent/JPS6010426A/ja
Publication of JPS6010426A publication Critical patent/JPS6010426A/ja
Publication of JPH0339337B2 publication Critical patent/JPH0339337B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/28—Systems for automatic generation of focusing signals
    • G02B7/30—Systems for automatic generation of focusing signals using parallactic triangle with a base line
    • G02B7/32—Systems for automatic generation of focusing signals using parallactic triangle with a base line using active means, e.g. light emitter
    • 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
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)
JP11939083A 1983-06-30 1983-06-30 焦点ぼけ検出装置 Granted JPS6010426A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11939083A JPS6010426A (ja) 1983-06-30 1983-06-30 焦点ぼけ検出装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11939083A JPS6010426A (ja) 1983-06-30 1983-06-30 焦点ぼけ検出装置

Publications (2)

Publication Number Publication Date
JPS6010426A JPS6010426A (ja) 1985-01-19
JPH0339337B2 true JPH0339337B2 (enrdf_load_stackoverflow) 1991-06-13

Family

ID=14760312

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11939083A Granted JPS6010426A (ja) 1983-06-30 1983-06-30 焦点ぼけ検出装置

Country Status (1)

Country Link
JP (1) JPS6010426A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
JPS6010426A (ja) 1985-01-19

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