JPS56107224A - Automatic dimming electronic flash device - Google Patents

Automatic dimming electronic flash device

Info

Publication number
JPS56107224A
JPS56107224A JP1125680A JP1125680A JPS56107224A JP S56107224 A JPS56107224 A JP S56107224A JP 1125680 A JP1125680 A JP 1125680A JP 1125680 A JP1125680 A JP 1125680A JP S56107224 A JPS56107224 A JP S56107224A
Authority
JP
Japan
Prior art keywords
flash
emission
distance
circuit
counter
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.)
Pending
Application number
JP1125680A
Other languages
Japanese (ja)
Inventor
Wataru Hasegawa
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.)
West Electric Co Ltd
Original Assignee
West 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 West Electric Co Ltd filed Critical West Electric Co Ltd
Priority to JP1125680A priority Critical patent/JPS56107224A/en
Publication of JPS56107224A publication Critical patent/JPS56107224A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B15/00—Special procedures for taking photographs; Apparatus therefor
    • G03B15/02—Illuminating scene
    • G03B15/03—Combinations of cameras with lighting apparatus; Flash units
    • G03B15/05—Combinations of cameras with electronic flash apparatus; Electronic flash units
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2215/00—Special procedures for taking photographs; Apparatus therefor
    • G03B2215/05—Combinations of cameras with electronic flash units

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Stroboscope Apparatuses (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE:To perform the dimming that corresponds to an object distance by stopping light emission after the time of a level at which the flash emission is stored passes, by previously sending distance information, obtained by receiving a reflected ultrasonic wave from an object, to the dimming circuit of an electronic flash device. CONSTITUTION:Transmission part H transmits an ultrasonic wave to an object and reception part I receives its reflected wave to measure the object distance via counter part N. Then, the distance is displayed on display part O and the signal that corresponds to the object distance is sent from counter N to dimming circuit E of discharge light emitting circuit D. A person who is taking a picture makes a focus adjustment over a look at the display on display part O and, after setting the F value in the camera, pushes the start button fully to open the shutter, thereby emitting a flash from the discharge tube. Simultaneously with the flash, light-emission stop signal generating circuit F receives the distance information from counter part N to operate, so that the flash emission of the discharge tube will stop.
JP1125680A 1980-01-31 1980-01-31 Automatic dimming electronic flash device Pending JPS56107224A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1125680A JPS56107224A (en) 1980-01-31 1980-01-31 Automatic dimming electronic flash device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1125680A JPS56107224A (en) 1980-01-31 1980-01-31 Automatic dimming electronic flash device

Publications (1)

Publication Number Publication Date
JPS56107224A true JPS56107224A (en) 1981-08-26

Family

ID=11772851

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1125680A Pending JPS56107224A (en) 1980-01-31 1980-01-31 Automatic dimming electronic flash device

Country Status (1)

Country Link
JP (1) JPS56107224A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4497562A (en) * 1981-12-25 1985-02-05 Minolta Camera Kabushiki Kaisha Exposure control device for flash photography
JPS60123172A (en) * 1983-12-06 1985-07-01 Canon Inc Image pickup device
JPS61105177A (en) * 1984-10-29 1986-05-23 Canon Inc Image pickup device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4497562A (en) * 1981-12-25 1985-02-05 Minolta Camera Kabushiki Kaisha Exposure control device for flash photography
JPS60123172A (en) * 1983-12-06 1985-07-01 Canon Inc Image pickup device
JPH0137071B2 (en) * 1983-12-06 1989-08-03 Canon Kk
JPS61105177A (en) * 1984-10-29 1986-05-23 Canon Inc Image pickup device
JPH0466145B2 (en) * 1984-10-29 1992-10-22 Kyanon Kk

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