| 摘要 |
PURPOSE:To obtain the contributing data only for flash light in a light measuring time, by the constitution wherein the total amount of received light and the amount of only the received steady-state light in the light measuring time are obtained by operation. CONSTITUTION:During the measuring time including the time of flash light emission, the flash light and steady-state light are received by a light receiving element 1. Then, the output of the light receiving element 1 corresponding to the total amount of the received light in the light measuring time is charged in a capacitor 12. The output of the light receiving element 1 corresponding to only the steady-state light is also charged in the capacitor 12 by the same way described above. The outputs are sent to a microcomputer 23. The microcomputer 23 computers the difference between the effects of the flash light and the steady- state light, obtains the contributing data for only the flash light in the light measuring time and displays the data on a display device 29. |
