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Polarization selecting optical element using a porro prism incorporating a thin film polarizer in a single element

United States Patent

May 8, 2001
View the Complete Patent at the US Patent & Trademark Office
Sandia National Laboratories - Visit the Intellectual Property Management and Licensing Website
A Porro prism and a light polarizer are combined in a single optical element termed a Hendrix Prism. The design provides retro-reflection of incoming light of a predetermined polarization in a direction anti-parallel to the direction of light incidence, while reflecting undesired light, i.e., that having a polarization orthogonal to the predetermined polarization, from the surface of the light polarizer. The undesired light is reflected in a direction that does not interfere with the intended operation of the device in which the Hendrix Prism is installed yet provides feedback to the system in which it is used.
Hendrix; James Lee (Livermore, CA)
The United States of America as represented by the United States Department of Energy (Washington, DC)
09/ 493,194
January 28, 2000
GOVERNMENT RIGHTS The United States Government has rights in this invention pursuant to Contract No. DEAC04-76DP00613, between the U.S. Department of Energy and AlliedSignal, Inc.