EXPOSURE CONTROLLER

PURPOSE:To obtain a color image excellent in a color balance by making a scanning exposure speed variable in accordance with the output of a photometry means which detects a light quantity by a control means. CONSTITUTION:Light beams from a light source transmitted through respective filters are turned into the separated light beams of B, G, and R or a specified color. The light quantity is detected by a sensor 1 being the photometry means positioned near an equalized point in a direction parallel with the axis of the bar-like light source, and converted into a digital signal by an A/D converter 5 through amplifiers 3 and 4 to be stored in a memory 7 through a CPU 6. In the case of exposure, the data is read out and arithmetically processed by the CPU 6, which commands a servo motor driver 9 through a driving pulse generation circuit 8 to control a scanning driving motor 10. The speed of the motor is fed back to the driver 9 by and encoder 11 so as to be stabilized.