| 摘要 |
<p>An optical filter assembly (10) for detecting a UV light comprising an afocal lens (40,42), a plurality of different reflective cylindrical shaped filter elements (14,16,18) and a detector (24). Each of the filter elements having reflective edges and being arranged to form a light reflective pipe. The afocal lens, the light reflecting pipe and a detector constructed and arranged so that on-axis light passing through the afocal lens will travel directly through the plurality of filter elements to the detector and off-axis light passing through the afocal lens will be reflected off of at least one of the reflective edges of at least one of the plurality of filter elements toward the detector. <IMAGE></p> |
