| 摘要 |
PROBLEM TO BE SOLVED: To control color parameter by making cut-off and cut-in frequencies adjustable through positioning a light beam source, one replaceable set of color filter elements, and its color filter. SOLUTION: A lamp 201 is fitted into a reflection assembly 204 to have a cooling chamber 205 equipped with a reflection surface 209, and an inlet 206 and an outlet 207. A projection beam, reflected from a mirror unit 210, is converged on a color control assembly 221 to rotate color wheels 220A, 220B, and 220C respectively under the control of a system controller 203. The respective color wheels allow the passing of a light beam in a variable and specific frequency band, and also are constituted of a whole dielectric dichroic filter for reflecting the other frequency light beam. Color parameter can be controlled by constituting this wheel system of a synthetic variable filter system to be controlled by the system controller 203 to perform the concentration control of color and color control. |
