| 摘要 |
PURPOSE:To prevent to give an influence to a screen even when an essential accumulating period is short by removing once the charge accumulated in a photodetecting of an image pick-up means and making different the potential distribution of the photodetecting part by the accumulating period of the charge to be removed and the essential accumulating period. CONSTITUTION:The output of a reference oscillator 101 is divided to a necessary signal by a frequency dividing circuit 102, the pulse necessary to a CCD driving is generated by driving pulse generating circuit 103 and 104, the level is shifted and the electric power is amplified to the voltage supplied from an electric power source 106 by a driving circuit 105, and a CCD1 is driven. On the other hand, a vertical fly-back line pulse VD is inputted to a time setting circuit 108 and a vertical transfer trigger pulse PT is generated. Further, a control signal C1 to control a level when phiI is accumulated, is generated by a PT and a VD, the PT and the C1 are added to the driving pulse generating circuit 104 and phiI is controlled. The output of a sensor 1 is smoothed, and in accor dance with the smoothing output, an exposure control member controls the falling light quantity. by the servo.
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