| 摘要 |
PURPOSE: To simplify a trigger circuit for starting the discharge of a stroboscopic tube. CONSTITUTION: When an electromotive force of about 350V is generated from a charge side coil 27 provided in a secondary coil 22 and a main capacitor 15 is charged with the electromotive force. A back electromotive force of 4KV (trigger voltage) is generated between both terminals 13d and 13e of the secondary coil 22, but a current does not flow from a trigger electrode 16a to the stroboscopic tube 16 and it is not discharged, because the impedance of a trigger side circuit formed on the sides of both terminals 13d and 13e of the secondary coil 22 is made high. When shutter blades are fully opened, a synchro switch 18 is opened during the oscillation operation of a transistor 12. The current flows into the stroboscopic tube 16 from the trigger electrode 16a with a back electromotive force of 4KV (trigger voltage) generated between both terminals 13d and 13e of the secondary coil 22 and the electric breakdown of the stroboscopic tube 16 is executed. |
