| 摘要 |
A color changer comprises a component hue saturation filter (46) which includes an elongated flexible substrate (32). The substrate (32) has a surface with a gradient axis (GA) and which includes a graded portion (G) supporting a uniform concentration of a selected hue filtering material (50) distributed in a continuously graded average density in beam-size areas (2, 6, 14) around points along the gradient axis (GA). The component hue saturation filters (46) may be embodied in separate substrates positionable in parallel planes to be intersected serially by a beam of light extending normally to the gradient axis.
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