G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 6/00 (2006.01) F21V 8/00 (2006.01) G02B 6/10 (2006.01) G02B 27/09 (2006.01) G02B 27/28 (2006.01) G02F 1/1335 (2006.01) G02F 1/13357 (2006.01)
Patent
CA 2187151
An optical device for collecting light and selectively outputting or concentrating the light. A wedge layer has an optical index of refraction n1, and top, bottom and side surfaces intersecting to define an angle of inclination .slzero.. A back surface spans the top, bottom and side surface. A first layer is coupled to the bottom surface of the layer and has an index of refraction n2. The first layer index n2 causes light input through the back surface of the layer to be preferentially output into the first layer. A second layer is coupled to the bottom of the first layer and selectively causes output of light into ambient. Additional layers, such as a light polarization layer, a polarization converting layer and a post LCD diffuser layer can be used to make preferential use of polarized light or diffuse light having passed through the LCD layer to enhance viewing of the output light.
Emmons Robert M.
Gleckman Philip
Holman Robert L.
Jacobson Benjamin A.
Winston Roland
Finlayson & Singlehurst
Minnesota Mining And Manufacturing Company
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