FR2393337A1 - Dispositif de mise au point automatique pour des appareils photographiques et cinematographiques - Google Patents

Dispositif de mise au point automatique pour des appareils photographiques et cinematographiques

Info

Publication number
FR2393337A1
FR2393337A1 FR7806829A FR7806829A FR2393337A1 FR 2393337 A1 FR2393337 A1 FR 2393337A1 FR 7806829 A FR7806829 A FR 7806829A FR 7806829 A FR7806829 A FR 7806829A FR 2393337 A1 FR2393337 A1 FR 2393337A1
Authority
FR
France
Prior art keywords
photographic
automatic focusing
focusing device
cinematographic
contrast
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.)
Withdrawn
Application number
FR7806829A
Other languages
English (en)
French (fr)
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.)
Sankyo Kogaku Kogyo Co Ltd
Original Assignee
Sankyo Kogaku Kogyo 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 Sankyo Kogaku Kogyo Co Ltd filed Critical Sankyo Kogaku Kogyo Co Ltd
Publication of FR2393337A1 publication Critical patent/FR2393337A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C3/00—Measuring distances in line of sight; Optical rangefinders
    • G01C3/10—Measuring distances in line of sight; Optical rangefinders using a parallactic triangle with variable angles and a base of fixed length in the observation station, e.g. in the instrument
    • 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
    • G02B7/305—Systems for automatic generation of focusing signals using parallactic triangle with a base line using a scanner

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Optics & Photonics (AREA)
  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)
  • Indication In Cameras, And Counting Of Exposures (AREA)
  • Studio Devices (AREA)
FR7806829A 1977-06-02 1978-03-09 Dispositif de mise au point automatique pour des appareils photographiques et cinematographiques Withdrawn FR2393337A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1977070718U JPS53166637U (enExample) 1977-06-02 1977-06-02

Publications (1)

Publication Number Publication Date
FR2393337A1 true FR2393337A1 (fr) 1978-12-29

Family

ID=13439616

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7806829A Withdrawn FR2393337A1 (fr) 1977-06-02 1978-03-09 Dispositif de mise au point automatique pour des appareils photographiques et cinematographiques

Country Status (4)

Country Link
US (1) US4171885A (enExample)
JP (1) JPS53166637U (enExample)
DE (1) DE2809530A1 (enExample)
FR (1) FR2393337A1 (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2472766A1 (fr) * 1979-12-29 1981-07-03 Asahi Optical Co Ltd Procede et dispositif de detection de mise au point pour appareil de prise de vues notamment
FR2516252A1 (fr) * 1981-11-12 1983-05-13 Asahi Optical Co Ltd Dispositif de focalisation automatique

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2847368A1 (de) 1977-11-02 1979-05-03 Canon Kk Kamera mit automatischer scharfeinstellvorrichtung
US4470676A (en) * 1978-07-28 1984-09-11 Canon Kabushiki Kaisha Focus detecting device
JPS5529832A (en) * 1978-08-23 1980-03-03 Asahi Optical Co Ltd Camera focus indicator
JPS55108627A (en) * 1979-02-09 1980-08-21 Asahi Optical Co Ltd Focus detector of camera
DE3005044C2 (de) * 1979-02-13 1984-09-20 Asahi Kogaku Kogyo K.K., Tokio/Tokyo Fokussierungsermittlungseinrichtung für eine Kamera
US4268165A (en) * 1979-12-17 1981-05-19 International Business Machines Corporation Apparatus and method for controlling the adjustment of optical elements in an electrophotographic apparatus
JPS5772113A (en) 1980-10-23 1982-05-06 Canon Inc Signal processing system
JPS57196206A (en) * 1981-05-29 1982-12-02 Hoya Corp Autofocus binocular
JPS57198418A (en) * 1981-06-01 1982-12-06 Minolta Camera Co Ltd Automatic focusing device
JPS5843409A (ja) * 1981-09-10 1983-03-14 Asahi Optical Co Ltd 合焦位置検出方法
JPS58189606A (ja) * 1982-04-30 1983-11-05 Fuji Electric Co Ltd 光学器械の自動焦点調整装置
US4470681A (en) * 1982-09-07 1984-09-11 Polaroid Corporation Method of and apparatus for detecting range using multiple range readings
US4851657A (en) * 1985-12-23 1989-07-25 Minolta Camera Kabushiki Kaisha Focus condition detecting device using weighted center or contrast evaluation

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3886567A (en) * 1972-08-28 1975-05-27 Canon Kk Optical system position controlling device
FR2344046A1 (fr) * 1976-03-12 1977-10-07 Canon Kk Organe transducteur photoelectrique

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4053934A (en) * 1972-12-29 1977-10-11 Kornreich Philipp G Measuring the quality of images
US4091275A (en) * 1976-10-07 1978-05-23 Honeywell Inc. Automatic focus system with oscillation inhibit circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3886567A (en) * 1972-08-28 1975-05-27 Canon Kk Optical system position controlling device
FR2344046A1 (fr) * 1976-03-12 1977-10-07 Canon Kk Organe transducteur photoelectrique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2472766A1 (fr) * 1979-12-29 1981-07-03 Asahi Optical Co Ltd Procede et dispositif de detection de mise au point pour appareil de prise de vues notamment
FR2516252A1 (fr) * 1981-11-12 1983-05-13 Asahi Optical Co Ltd Dispositif de focalisation automatique

Also Published As

Publication number Publication date
JPS53166637U (enExample) 1978-12-27
US4171885A (en) 1979-10-23
DE2809530A1 (de) 1978-12-14

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse