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JPS55103540A - Automatic dimming electronic flash device - Google Patents

Automatic dimming electronic flash device

Info

Publication number
JPS55103540A
JPS55103540A JP1085779A JP1085779A JPS55103540A JP S55103540 A JPS55103540 A JP S55103540A JP 1085779 A JP1085779 A JP 1085779A JP 1085779 A JP1085779 A JP 1085779A JP S55103540 A JPS55103540 A JP S55103540A
Authority
JP
Japan
Prior art keywords
discharge tube
voltage
flash device
electronic flash
series
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
JP1085779A
Other languages
Japanese (ja)
Inventor
Katsumi Horinishi
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 JP1085779A priority Critical patent/JPS55103540A/en
Publication of JPS55103540A publication Critical patent/JPS55103540A/en
Pending legal-status Critical Current

Links

Landscapes

  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
  • Stroboscope Apparatuses (AREA)

Abstract

PURPOSE:To make possible the adequate emission quantity controlling of flash discharge tube by letting the charging of the integrating capacitor which is series- connected to a photo transistor be effected after the specified time from power supply. CONSTITUTION:The device is provided with a photo transistor 15 which receives the reflected light from the object through the light emission of a flash discharge tube 6, a switching element 17 which shorts the both ends of the integrating capacitor 16 series-connected to the element 15, a circuit 19 which generates voltage by operating simultaneously with the light emission of the discharge tube 6, and delay circuits 20, 21 which make the element 17 non-conducting with a delay of arbitrary time that the voltage generating period of the circuit 10. The quantity of the light emitted by the discharge tube 6 is controlled by the voltage of the capacitor 16.
JP1085779A 1979-02-01 1979-02-01 Automatic dimming electronic flash device Pending JPS55103540A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1085779A JPS55103540A (en) 1979-02-01 1979-02-01 Automatic dimming electronic flash device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1085779A JPS55103540A (en) 1979-02-01 1979-02-01 Automatic dimming electronic flash device

Publications (1)

Publication Number Publication Date
JPS55103540A true JPS55103540A (en) 1980-08-07

Family

ID=11762016

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1085779A Pending JPS55103540A (en) 1979-02-01 1979-02-01 Automatic dimming electronic flash device

Country Status (1)

Country Link
JP (1) JPS55103540A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58186729A (en) * 1982-04-26 1983-10-31 Sanpack:Kk Automatic stroboscope

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58186729A (en) * 1982-04-26 1983-10-31 Sanpack:Kk Automatic stroboscope

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