DEVICE FOR VARYING QUANTITY OF LIGHT WITHOUT CHANGING COLOR TEMPERATURE

摘要

PROBLEM TO BE SOLVED: To change the light quantity without changing the color temperature by using a plurality of vanes to make the area of the optical path variable. SOLUTION: The light emitting from a light source is condensed by a lens and the area of the optical path is changed by a slit formed by a plurality of vanes in the middle of the optical path. The light is then passed through a mirror box or a glass column. Thus, by changing the area of the slit, light with uniform and various states of illuminance can be obtain without changing the color temperature.