IT1197673B - Control circuit for electronic flash - Google Patents

Control circuit for electronic flash

Info

Publication number
IT1197673B
IT1197673B IT48662/83A IT4866283A IT1197673B IT 1197673 B IT1197673 B IT 1197673B IT 48662/83 A IT48662/83 A IT 48662/83A IT 4866283 A IT4866283 A IT 4866283A IT 1197673 B IT1197673 B IT 1197673B
Authority
IT
Italy
Prior art keywords
control circuit
flash
electronic flash
illumination
photocell
Prior art date
Application number
IT48662/83A
Other languages
Italian (it)
Other versions
IT8348662A0 (en
Inventor
Yoshiyuki Takematsu
Original Assignee
Fuji Koeki Corp
Takematsu Y
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 Fuji Koeki Corp, Takematsu Y filed Critical Fuji Koeki Corp
Publication of IT8348662A0 publication Critical patent/IT8348662A0/en
Application granted granted Critical
Publication of IT1197673B publication Critical patent/IT1197673B/en

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/30—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp
    • H05B41/32—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp for single flash operation
    • H05B41/325—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp for single flash operation by measuring the incident light
    • 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)

Abstract

The preliminary circuit is switched to one of two settings; to inhibit the flash action or to permit it. It has a photocell to monitor the background illumination and a range setting to adjust the illumination threshold in relation to film speed and aperture setting. The control circuit enables different types of lens to be fitted to the camera without having to reset the flash parameters. A fully automatic flash is obtained.
IT48662/83A 1982-07-13 1983-07-11 Control circuit for electronic flash IT1197673B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1982105168U JPS5912135U (en) 1982-07-13 1982-07-13 Flash discharge emitter that responds to the brightness of the subject

Publications (2)

Publication Number Publication Date
IT8348662A0 IT8348662A0 (en) 1983-07-11
IT1197673B true IT1197673B (en) 1988-12-06

Family

ID=14400147

Family Applications (1)

Application Number Title Priority Date Filing Date
IT48662/83A IT1197673B (en) 1982-07-13 1983-07-11 Control circuit for electronic flash

Country Status (5)

Country Link
JP (1) JPS5912135U (en)
DE (1) DE3322208A1 (en)
FR (1) FR2530353A1 (en)
GB (1) GB2123570A (en)
IT (1) IT1197673B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4887120A (en) * 1984-02-04 1989-12-12 Ricoh Company, Ltd. Electronic flash photographing system
JP2868270B2 (en) * 1990-02-14 1999-03-10 旭光学工業株式会社 Camera exposure control device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4939418B1 (en) * 1967-03-07 1974-10-25
JPS52125318A (en) * 1976-03-17 1977-10-21 West Electric Co Flash camera
JPS53106031A (en) * 1977-02-28 1978-09-14 Asahi Optical Co Ltd Strobo luminous control device using light measuring circuit for focal plane shutter type camera

Also Published As

Publication number Publication date
GB8318293D0 (en) 1983-08-10
IT8348662A0 (en) 1983-07-11
JPS5912135U (en) 1984-01-25
GB2123570A (en) 1984-02-01
FR2530353A1 (en) 1984-01-20
DE3322208A1 (en) 1984-01-26

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