| 摘要 |
<p>A system for measuring the reduced light quantity of a lamp is configured in a measuring system, since the light quantity required for measurement cannot be ensured when the light quantity of the lamp is reduced, the light quantity required for the measurement is ensured by controlling the transmissivity of light emitted from a light source corresponding to the reduced quantity, and the measurement is continued. The reduced light quantity of the lamp is measured by providing an optical path with a reflecting mirror and using video signals of a CCTV camera. Furthermore, illuminance characteristics of an illuminating device are stored in an image processing unit, and the light quantity of the illuminating device is controlled so as to obtain the light quantity required for measurement using the stored information.</p> |
