GB1512097A - Automatic focusing system - Google Patents

Automatic focusing system

Info

Publication number
GB1512097A
GB1512097A GB2460575A GB2460575A GB1512097A GB 1512097 A GB1512097 A GB 1512097A GB 2460575 A GB2460575 A GB 2460575A GB 2460575 A GB2460575 A GB 2460575A GB 1512097 A GB1512097 A GB 1512097A
Authority
GB
United Kingdom
Prior art keywords
feet
focusing
difference signal
motor
signal
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
GB2460575A
Other languages
English (en)
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.)
Bell and Howell Co
Original Assignee
Bell and Howell Co
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
Priority claimed from US05/536,666 external-priority patent/US4032934A/en
Priority claimed from US05/538,228 external-priority patent/US3984846A/en
Application filed by Bell and Howell Co filed Critical Bell and Howell Co
Publication of GB1512097A publication Critical patent/GB1512097A/en
Expired 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)
  • Control Of Position Or Direction (AREA)
  • Lens Barrels (AREA)
GB2460575A 1974-12-26 1975-06-09 Automatic focusing system Expired GB1512097A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/536,666 US4032934A (en) 1974-12-26 1974-12-26 Automatic focusing system
US05/538,228 US3984846A (en) 1975-01-02 1975-01-02 Photoreceptor assembly for automatic focusing system

Publications (1)

Publication Number Publication Date
GB1512097A true GB1512097A (en) 1978-05-24

Family

ID=27065216

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2460575A Expired GB1512097A (en) 1974-12-26 1975-06-09 Automatic focusing system

Country Status (3)

Country Link
JP (1) JPS5178327A (de)
DE (1) DE2526612A1 (de)
GB (1) GB1512097A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3310601A1 (de) * 1982-03-24 1983-10-06 Canon Kk Entfernungsmessvorrichtung

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS539118A (en) * 1976-07-13 1978-01-27 Sankyo Kougaku Kougiyou Kk Camera with automatic focusing unit
JPS56133721A (en) * 1980-03-24 1981-10-20 Canon Inc Fine adjusting device for range finding mechanism of automatic focusing camera
JPS5784506U (de) * 1980-11-12 1982-05-25
JPS58120226A (ja) * 1982-01-12 1983-07-18 Asahi Optical Co Ltd オ−トフオ−カスカメラ
JPS59101236U (ja) * 1982-12-13 1984-07-07 チノン株式会社 測距装置
JPS5995336U (ja) * 1982-12-17 1984-06-28 ソニー株式会社 ビデオカメラ
JPH0447688Y2 (de) * 1985-08-09 1992-11-11
JPS6233018U (de) * 1985-08-12 1987-02-27

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3310601A1 (de) * 1982-03-24 1983-10-06 Canon Kk Entfernungsmessvorrichtung
GB2122448A (en) * 1982-03-24 1984-01-11 Canon Kk Distance determining device

Also Published As

Publication number Publication date
JPS5178327A (de) 1976-07-07
DE2526612A1 (de) 1976-07-08

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee