| 摘要 |
PROBLEM TO BE SOLVED: To provide a photometry device which is simply constituted at a low cost, and capable of accurately executing photometry even under high luminance. SOLUTION: As for the photometry device, light reflected by an object is received by a light receiving part 11, and a signal current is generated in accordance with the luminance of the object. And, a signal showing the luminance of the object is generated by a photometry part 12 based on the output of the light receiving part 11. Besides, a bias voltage is supplied to the light receiving part 11 by a bias supply part 13. Whether or not the luminance of the object is exceeding a prescribed value is decided by a high luminance deciding part 15, and the bias voltage of the bias supply part 13 is controlled by a control part 14 based on the decision results of the high luminance deciding part 15. |
