| 摘要 |
PURPOSE:To make it possible to output sensitivity correction data having reliability, by measuring lights in blue, green and red regions in order to operate correction data. CONSTITUTION:Voltages Vb, Vr, Vg corresponding to the intensity of incident light are outputted from photometric circuits 1-3 and the voltages Vb, Vr are inputted to subtraction circuit 40 while the voltages Vr, Vg are inputted to a subtraction circuit 42 and the output V8 of said circuit 42 is inputted to a reversal amplifying circuit 52. The output V6 of the circuit 40 is inputted to a reversal amplifying circuit 50 while the output VMb of the circuit 50 is inputted to a reversal operation circuit 60 to be displayed on a meter M0 as a photographical color temp. Tbk through a voltage/current converter circuit. In the same way, the output VMg of the circuit 52 is displayed on a meter M2 as photographic color temp. Tgk through a reciprocal operation circuit 62. When the output VMb of the circuit 50 is larger than the output voltage V14 of a constant voltage source E8, the output of an operational amplifier OA22 becomes H, and the circuit 60 and the meter M0 are not operated and a light emitting diode LD0 lights to issue an alarm. The same operation is performed in the case of the circuit 62. The outputs of the amplifier 50 and the circuits 52 are inputted to a subtraction circuit 8 and a voltage corresponding to a CC factor is displayed on a meter M6. |
