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Title:
FLAT LIGHT EMITTING STROBOSCOPE DEVICE OF STATIC TYPE
Document Type and Number:
Japanese Patent JPS61129632
Kind Code:
A
Abstract:

PURPOSE: To make the high-speed operation of a focal plane shutter possible by setting optionally the effective guide number of a strobe device and keeping the set effective guide number constant independently of shutter seconds.

CONSTITUTION: A flash discharging tube XL and a switching element SW are connected in series in the discharging loop of a main capacitor CM of a main circuit part 100, and a capacitor Cs for excess light emission is connected in parallel to the element SW. A monitor circuit 202 of a control circuit 211 detects the voltage of the main capacitor CM or the quantity of emitted light of the discharging tube XL and monitors it, and the quantity of emitted light of the discharging tube XL is set by a setting circuit 201. A light emission control circuit 203 turns on the element SW when the luminance value converted to a monitor value is smaller than the lower limit value of the luminance of light emission determined by the value set by the setting circuit 201, and the circuit 203 turns off the element SW when said luminance value exceeds the upper limit value. Thus, flash light emission is kept at a certain luminance for a prescribed time by one trigger to make the high-speed operation of the focal plane shutter possible.


Inventors:
NAKAMURA HIROAKI
Application Number:
JP1984000252276
Publication Date:
June 17, 1986
Filing Date:
November 28, 1984
Export Citation:
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Assignee:
OLYMPUS OPTICAL CO
International Classes:
G03B15/05; (IPC1-7): G03B15/05



 
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