| 摘要 |
A light source for a scrolling color illumination system includes a lamp ( 212 ) producing light, first and second independent reflectors ( 220, 230 ) each receiving a portion of the light from the lamp ( 212 ), and a light guide ( 260 ) receiving two independent images of the light source created by the portions of the light received by the first and second independent reflectors ( 220, 230 ). Through such an arrangement, the light guide ( 260 ) provides a light beam at an output thereof having an aspect ratio that is twice an aspect ratio of the light beam produced by the lamp ( 212 ) while preserving its original etendue. Beneficially, a polarizing element ( 266 ) polarizes the unpolarized light beam from the light guide ( 260 ) and, in the process, the aspect ratio is further doubled, again without an increase in the etendue.
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