JPH0339338B2 - - Google Patents

Info

Publication number
JPH0339338B2
JPH0339338B2 JP15927183A JP15927183A JPH0339338B2 JP H0339338 B2 JPH0339338 B2 JP H0339338B2 JP 15927183 A JP15927183 A JP 15927183A JP 15927183 A JP15927183 A JP 15927183A JP H0339338 B2 JPH0339338 B2 JP H0339338B2
Authority
JP
Japan
Prior art keywords
lens
light
objective lens
focus
storage medium
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
JP15927183A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6050730A (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 JP15927183A priority Critical patent/JPS6050730A/ja
Publication of JPS6050730A publication Critical patent/JPS6050730A/ja
Publication of JPH0339338B2 publication Critical patent/JPH0339338B2/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)
JP15927183A 1983-08-31 1983-08-31 焦点ぼけ検出装置 Granted JPS6050730A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15927183A JPS6050730A (ja) 1983-08-31 1983-08-31 焦点ぼけ検出装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15927183A JPS6050730A (ja) 1983-08-31 1983-08-31 焦点ぼけ検出装置

Publications (2)

Publication Number Publication Date
JPS6050730A JPS6050730A (ja) 1985-03-20
JPH0339338B2 true JPH0339338B2 (enrdf_load_stackoverflow) 1991-06-13

Family

ID=15690125

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15927183A Granted JPS6050730A (ja) 1983-08-31 1983-08-31 焦点ぼけ検出装置

Country Status (1)

Country Link
JP (1) JPS6050730A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
JPS6050730A (ja) 1985-03-20

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