| 摘要 |
An optical system, light fixture and method are provided that include a light source, a non-circular aperture, a filter apparatus, and a lens. The light source produces a first beam of light, a portion of which is passed by the non-circular aperture. The filter apparatus is positioned proximate to the non-circular aperture and is operable to selectively position a desired portion of a variable density filter in the portion of the first beam of light passed by the non-circular aperture. The lens collects the portion of the first beam of light passed by the non-circular aperture to produce a second beam of light.
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