Aperture illumination control membrane
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United States of America Patent
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Feb 27, 2007
Grant Date -
Sep 15, 2005
app pub date -
Feb 3, 2005
filing date -
Feb 4, 2004
priority date (Note) -
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Abstract
A device for modifying electromagnetic illumination of a reflector aperture defined by a reflector surface is mounted in front of the reflector aperture in a spaced apart relationship relative to the reflector surface. The device at least partially covers the reflector aperture and provides an illumination control means for at least partially and selectively modifying electromagnetic illumination of the reflector aperture. The device may include a membrane-like substrate that is substantially transparent to electromagnetic radiation. A supporting member may support the substrate in the spaced apart relationship relative to the reflector surface.
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