JPS55153928A - Automatic light quantity controlling flash light emitting device - Google Patents

Automatic light quantity controlling flash light emitting device

Info

Publication number
JPS55153928A
JPS55153928A JP1245876A JP1245876A JPS55153928A JP S55153928 A JPS55153928 A JP S55153928A JP 1245876 A JP1245876 A JP 1245876A JP 1245876 A JP1245876 A JP 1245876A JP S55153928 A JPS55153928 A JP S55153928A
Authority
JP
Japan
Prior art keywords
light
xenon lamp
emitting device
voltage
control element
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
JP1245876A
Other languages
Japanese (ja)
Inventor
Yasuo Nakayama
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.)
Morris Photo Industry Co Ltd
Original Assignee
Morris Photo Industry 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 Morris Photo Industry Co Ltd filed Critical Morris Photo Industry Co Ltd
Priority to JP1245876A priority Critical patent/JPS55153928A/en
Publication of JPS55153928A publication Critical patent/JPS55153928A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To control the quantity of emitted light by charging a capacitor through the photoelectric element which actuates by receiving the reflected light from the subject at the same instant of light emission of an internal light emitting device and controlling the light quantity control element when its voltage reaches the specified voltage thereby cutting off or putting out the light source. CONSTITUTION:When a trigger switch TS is closed, a xenon lamp Xe goes on and a switch SW closes at the same time. When the reflected light from the subject enters a photoconductor PC such as CdS, its resistance decreases and a capacitor SC is charged by an electric power source E. When its voltage reaches the preset value, a relay discharge tube RD discharges and the voltage having been applied to a light quantity control element LC' using, for example, glass panel, becomes zero and therefore the element becomes nontransparent to cut off the light of the xenon lamp. It is also possible to control the quantity of light by shorting and putting out the xenon lamp Xe by making use of a light quantity control element LC' such as thyristor.
JP1245876A 1976-02-07 1976-02-07 Automatic light quantity controlling flash light emitting device Pending JPS55153928A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1245876A JPS55153928A (en) 1976-02-07 1976-02-07 Automatic light quantity controlling flash light emitting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1245876A JPS55153928A (en) 1976-02-07 1976-02-07 Automatic light quantity controlling flash light emitting device

Publications (1)

Publication Number Publication Date
JPS55153928A true JPS55153928A (en) 1980-12-01

Family

ID=11805892

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1245876A Pending JPS55153928A (en) 1976-02-07 1976-02-07 Automatic light quantity controlling flash light emitting device

Country Status (1)

Country Link
JP (1) JPS55153928A (en)

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