JPS5317705A - Automatic focusing system - Google Patents

Automatic focusing system

Info

Publication number
JPS5317705A
JPS5317705A JP9136076A JP9136076A JPS5317705A JP S5317705 A JPS5317705 A JP S5317705A JP 9136076 A JP9136076 A JP 9136076A JP 9136076 A JP9136076 A JP 9136076A JP S5317705 A JPS5317705 A JP S5317705A
Authority
JP
Japan
Prior art keywords
automatic focusing
focusing system
disposing
distribution
laser light
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
JP9136076A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6224858B2 (enrdf_load_stackoverflow
Inventor
Toshimitsu Miyauchi
Takeshi Maeda
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 JP9136076A priority Critical patent/JPS5317705A/ja
Publication of JPS5317705A publication Critical patent/JPS5317705A/ja
Publication of JPS6224858B2 publication Critical patent/JPS6224858B2/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

  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)
JP9136076A 1976-08-02 1976-08-02 Automatic focusing system Granted JPS5317705A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9136076A JPS5317705A (en) 1976-08-02 1976-08-02 Automatic focusing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9136076A JPS5317705A (en) 1976-08-02 1976-08-02 Automatic focusing system

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP30841486A Division JPS62275326A (ja) 1986-12-26 1986-12-26 自動焦点合わせ方式

Publications (2)

Publication Number Publication Date
JPS5317705A true JPS5317705A (en) 1978-02-18
JPS6224858B2 JPS6224858B2 (enrdf_load_stackoverflow) 1987-05-30

Family

ID=14024209

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9136076A Granted JPS5317705A (en) 1976-08-02 1976-08-02 Automatic focusing system

Country Status (1)

Country Link
JP (1) JPS5317705A (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57139713A (en) * 1981-01-20 1982-08-28 Thomson Csf Optical device for condensing error detection and optical recording-reading means having it
FR2518295A1 (fr) * 1981-12-11 1983-06-17 Philips Nv Systeme de detection de defauts de focalisation optique
JPS58193335U (ja) * 1982-06-17 1983-12-22 パイオニア株式会社 フオ−カスエラ−検出装置
JPS6077022U (ja) * 1983-11-01 1985-05-29 パイオニア株式会社 焦点誤差検出装置
JPS62198516U (enrdf_load_stackoverflow) * 1987-05-20 1987-12-17
JPS644926A (en) * 1987-06-29 1989-01-10 Mitsubishi Electric Corp Optical type head device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63229078A (ja) * 1987-03-17 1988-09-22 株式会社　遠藤製作所 ゴルフクラブヘツド

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57139713A (en) * 1981-01-20 1982-08-28 Thomson Csf Optical device for condensing error detection and optical recording-reading means having it
FR2518295A1 (fr) * 1981-12-11 1983-06-17 Philips Nv Systeme de detection de defauts de focalisation optique
JPS58193335U (ja) * 1982-06-17 1983-12-22 パイオニア株式会社 フオ−カスエラ−検出装置
JPS6077022U (ja) * 1983-11-01 1985-05-29 パイオニア株式会社 焦点誤差検出装置
JPS62198516U (enrdf_load_stackoverflow) * 1987-05-20 1987-12-17
JPS644926A (en) * 1987-06-29 1989-01-10 Mitsubishi Electric Corp Optical type head device

Also Published As

Publication number Publication date
JPS6224858B2 (enrdf_load_stackoverflow) 1987-05-30

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