| 摘要 |
PROBLEM TO BE SOLVED: To provide an equipment which compensates variation in a picture signal resulting from variation of lighting intensity. SOLUTION: The equipment compensates variation of light emitted from an light source (1) and propagated along with a lighting path. It is a type of equipment which has a first light sensor which divides spatially and detects the intensity in the first position in the light path and forms en electric image, and has a second light sensor(27, 28, 29, 52, 54) which detects intensity in a second part in the light path, and forms an electric output signal. In this equipment, the second sensor divides spatially and detects the light intensity, and is provided with an evaluation circuit(26) which receives an output signal of the first sensor and also an output signal of the second sensor. The evaluation circuit corrects an input signal emitted from the first sensor, depending on an input signal emitted from the second sensor. The correction is performed so that the output signal of the evaluation circuit may not be substantially dependent on the variation of the light intensity. COPYRIGHT: (C)2004,JPO&NCIPI
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