| 摘要 |
A multi-colored illumination system comprising a beam combiner. The beam combiner comprises two triangular prisms and a filter for transmitting a fir st light and reflecting a second light, each light having a different wavelengt h. The beam combiner combines the transmitted first light and the reflected lig ht to provide a combined beam. The six surfaces of each of the triangular prism of the beam combiner is polished, thereby combining the lights without increasing etendue of the multi-colored illumination system.
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