05528720 is referenced by 140 patents and cites 151 patents.

An optical device for collecting light and selectively outputting or concentrating the light. A wedge layer has an optical index of refraction n.sub.1, and top, bottom and side surfaces intersecting to define an angle of inclination .phi.. 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 n.sub.2. The first layer index n.sub.2 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.

Title
Tapered multilayer luminaire devices
Application Number
855838
Publication Number
5528720
Application Date
April 11, 1994
Publication Date
June 18, 1996
Inventor
Philip Gleckman
Irvine
CA, US
Robert M Emmons
Rolling Meadows
IL, US
Benjamin A Jacobson
Chicago
IL, US
Robert L Holman
Naperville
IL, US
Roland Winston
Chicago
IL, US
Agent
Reinhart Boerner Van Deuren Norris & Rieselbach
Assignee
Minnesota Mining and Manufacturing Co
MN, US
IPC
G02B 6/26
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