JPS6219635U

JPS6219635U -

Info

Publication number: JPS6219635U
Application number: JP10889885U
Authority: JP
Priority date: 1985-07-18
Filing date: 1985-07-18
Publication date: 1987-02-05

Description

[Brief explanation of drawings]

第１図は、本考案に係る多灯発光ストロボの発
光制御装置の原理説明用の回路ブロツク図、第２
図は、本考案の一実施例を示す多灯発光ストロボ
の発光制御装置の回路ブロツク図、第３図及び第
４図は、上記第２図中に示されるスイツチの変形
例をそれぞれ示す回路図である。１０……積分器、２０……基準値設定器、３０
……分圧器、４０……第１の比較器、５０……第
１のストロボ、６０……第２の比較器、７０……
第２のストロボ、１１……受光ダイオード、１２
，４１，６１……オペアンプ、１３……積分コン
デンサ、１４，１６，３１〜３４……抵抗、２１
……Ｄ／Ａ変換器、３５……光量比切替スイツチ
、３５′ａ〜３５′ｄ……アナログスイツチ、３
６……切換制御器、３７……可変抵抗。 FIG. 1 is a circuit block diagram for explaining the principle of a light emission control device for a multi-flash strobe according to the present invention, and FIG.
The figure is a circuit block diagram of a light emission control device for a multi-flash strobe showing one embodiment of the present invention, and FIGS. 3 and 4 are circuit diagrams showing modifications of the switch shown in FIG. 2 above, respectively. It is. 10...Integrator, 20...Reference value setter, 30
... Voltage divider, 40 ... First comparator, 50 ... First strobe, 60 ... Second comparator, 70 ...
Second strobe, 11... Light receiving diode, 12
, 41, 61... operational amplifier, 13... integrating capacitor, 14, 16, 31-34... resistor, 21
...D/A converter, 35...Light ratio selection switch, 35'a to 35'd...Analog switch, 3
6...Switching controller, 37...Variable resistor.

Claims

[Scope of utility model registration request]

Light emission control for multi-flash strobes that fires multiple strobe devices simultaneously, integrates the reflected light from the subject using an integrator, and stops firing when this integrated value reaches a reference voltage value corresponding to the appropriate exposure amount. The apparatus includes a voltage divider that divides a voltage between a voltage value at the start of integration in the integrator and the reference voltage value, and a first light emission stop when the output voltage of the integrator reaches the reference voltage value. a first comparator that outputs a signal, a second comparator that outputs a second light emission stop signal when the output voltage of the integrator reaches the output voltage of the voltage divider, and the first light emission A multi-light emitting strobe comprising a first strobe device that stops emitting light in response to a stop signal, and a second strobe device that stops emitting light in response to the second light emitting stop signal. Light emission control device.