Combined optical diffuser and light concentrator

Details Combined optical diffuser and light concentrator Combined optical diffuser and light concentrator

1996-03-08

1999-01-19

Spyrou, Cassandra C.

Optical: systems and elements

Diffusing of incident light

359608, 362355, 362360, 362361, G02B 1314, G02B 502, G02B 508

Patent

active

058619909

ABSTRACT:
A combined optical diffuser and light concentrator uses a layer of optically transmissive material having a first surface to receive light at a range of angles of incidence and a second surface from which the light emerges at a range of angles of emergence, the second surface including a relief pattern featuring a multiplicity of minute projections, the shape and distribution of the projections resulting in diffused light at a range of angles of emergence narrower than the range of angles of incidence. The projections may be produced in accordance with various techniques, including the processing of a photoresist layer exposed to a random speckle pattern or microlithography, including e-beam/x-ray sources.

REFERENCES:
patent: 734020 (1903-07-01), Wadsworth
patent: 3527151 (1970-09-01), Harrison
patent: 5048925 (1991-09-01), Gerritsen et al.
patent: 5365354 (1994-11-01), Jannson et al.
patent: 5381309 (1995-01-01), Borchardt

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