06639733 is referenced by 130 patents.

A highly efficient optical device comprises two opposing active non-spherical optical surfaces defined by a two-dimensional representation that is symmetrically extended to provide a three-dimensional device. A focal area, spaced apart from the optical surface and non-contiguous therewith, is defined by the two opposing active optical surfaces. The active optical surfaces each have a continuous second derivative, and the optical surfaces are defined by a polynomial with an order of at least about twenty. The optical device may comprise a transparent dielectric core, and the optical surfaces may be formed on the core. A receiver may be situated at the focal area to provide a concentrator. An extended light source such as an LED may be situated at the focal area, to provide a collimator. Faceted embodiments can provide a low aspect optical device. In some embodiments a diffuser may be used to transform incident radiation into a predetermined shape.

Title
High efficiency non-imaging optics
Application Number
9/810959
Publication Number
6639733 (B2)
Application Date
March 16, 2001
Publication Date
October 28, 2003
Inventor
H J Caulfield
Cornersville
TN, US
Waqidi Falicoff
Solana Beach
CA, US
Juan C Gonzalez
Madrid
US
Pablo Benitez
Madrid
US
Juan C Minano
Madrid
US
Agent
Law Offices of James D McFarland
US
Assignee
Light Prescriptions Innovators
CA, US
IPC
G02B 17/00
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