05303322 is referenced by 167 patents and cites 66 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 d. 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 an air gap, can be provided adjacent to the wedge shaped layer. The wedge shaped layer can also have a variable index of refraction n (x,y,z).

Title
Tapered multilayer luminaire devices
Application Number
855838
Publication Number
5303322
Application Date
March 11, 1993
Publication Date
April 12, 1994
Inventor
Neil A Gitkind
Chicago
IL, US
Robert L Holman
Naperville
IL, US
Benjamin A Jacobson
Chicago
IL, US
Roland Winston
Chicago
IL, US
Agent
Reinhart Boerner Van Deuren Norris & Rieselbach
Assignee
NiOptics Corporation
IL, US
IPC
G02B 6/26
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