Patent ID: 6487372
Filing Date: 2002-11-26
Classification: G03B

Abstract:
A photometry device for a camera, comprising:a normal light sensor that performs a photometry operation with respect to an object; an exposure amount determining system that determines an exposure amount of an object in accordance with an output of said normal light sensor; a plurality of colorimetric sensors having spectral sensitivity characteristics different from each other, said plurality of colorimetric sensors performing a colorimetric operation with respect to an image of the object through a lens of said camera; an external light sensor that measures external light illuminating the object at spectral sensitivity characteristics corresponding to each of said plurality of colorimetric sensors; a light source color compensation amount calculation system that calculates a light source color compensation amount based on light source data; a colorimetric compensation amount calculation system that determines a color of the object based on metered values output by said colorimetric sensors and compensated using the light source color compensation amount, and calculates a colorimetric compensation amount based on the judged color; a colorimetric compensation system that compensates for the exposure amount based on the colorimetric compensation amount, wherein a predetermined fixed value is used as the light source data, and wherein, if a difference between the exposure value obtained from the output of the external light sensor and the exposure value obtained based on the output of said normal light photometry sensor is greater than a predetermined reference value, the colorimetric compensation amount is forcibly set to zero.