| 摘要 |
PURPOSE:To make the timing accurate and simplify the device to arrange it in a narrow space, by controlling the timing of the auto-flash tuning light emission by the position signal of a sector detected by a photointerrupter. CONSTITUTION:A photointerrupter 17 consisting of an LED 17a for light projection and an SPC17b for photodetection is fixed to a shutter base plate 14 and is connected to a driving control circuit through an electric terminal 17c, and a sector 15 is provided with a prescribed window. In accordance with the opening motion of the shutter, the light of the LED17a passes through the window of the sector 15 and is detected by the SPC17b to obtain the sector position as an electric signal. At the timing of this position signal, an exposure controlling circuit of the camera is operated, and the tuning light emission is performed through a flash device. Thus, an accurate timing is obtained, and the device is simplified and is arranged in a narrow space. |
