| 摘要 |
A beam forming catoptric lens arrangement is disclosed in which an extended, or Lambertian, source of light is positioned in coincidence with a focal circle of a first "parellipsoidal" (meaning almost ellipsoidal) mirror and then directed toward a confocal mirror to form an emergent beam of desired shape. Also disclosed is a mirror arrangement to reflect light initially not directed toward the first parallipsoidal mirror through its focal circle to reflect off such mirror. Still further disclosed is a light baffle assembly in the path of light within the disclosed lens arrangement to permit only meridional rays and rays in planes nearly aligned with meridional planes to be present in the emergent beam.
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