| 摘要 |
PURPOSE:To prevent uneven exposure in lighting, by providing means for controlling the voltage to be applied to a light source in accordance with the control amount of light source light quantity to compensate the time from start of light source lighting to arrival at the predetermined light quantity. CONSTITUTION:As means for controlling the light quantity of an exposure light source, variable resistor VR2; variable resistor VR3 for finely controlling the exposure set with variable resistor VR2; variable resistor VR1 for defining the control range by variable resistor VR2; capacity C1 for composing a delay circuit; resistors R8 to R10; and variable resistor VR4, etc. are provided, and the voltage defined with variable resistors VR1, VR2, and VR3 is applied to operation amplifier Q3, and its voltage is produced from therminal T3. |
