| 摘要 |
An improved catoptric lens arrangement for forming a composite beam of wave propagated energy emanating from more than one source is shown; in the preferred embodiment each one of two ring sources of light disposed around an axis of symmetry illuminates a different one of a pair of confocal mirrors in a manner that light reflected from such mirrors becomes incident on a beam forming mirror confocal with the pair of confocal mirrors to form a desired composite beam.
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