Adjustable lens with self-illuminated scale
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United States of America Patent
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Dec 20, 2011
Grant Date -
Sep 3, 2009
app pub date -
Feb 26, 2009
filing date -
Feb 28, 2008
priority date (Note) -
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Abstract
An adjustable lens with a self-illuminating scale for use in photography, cinematography, or videography has a housing surface with scale markings and an opaque member with a reference marking mounted over and movable relative to the surface. The movement of the member normally adjusts a parameter of the lens. The scale markings are visible through a window in the member. The edge of the member adjacent the scale has an opening. A light source is situated within a recess in the member adjacent the opening. Light is directed from the light source through the edge opening in a direction along the surface of the surface such that the visible scale markings are illuminated, while light from the light source is otherwise substantially prevented from escaping from the lens. The activation and intensity of the light source is controlled by movement of the member or an external illumination controller.
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Cited Art Landscape
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