Beam steering device

Details Beam steering device Beam steering device

2006-05-22

2008-08-26

Schechter, Andrew (Department: 2871)

Liquid crystal cells, elements and systems

Liquid crystal optical element

Liquid crystal diffraction element

C349S201000, C349S113000

Reexamination Certificate

active

07417706

ABSTRACT:
A beam steering device uses a liquid crystal with an array of back electrodes. Voltages are applied to the array to cause a desired phase distribution across the array, the distribution being selected to steer a beam incident upon the array into a desired direction. Reflective elements are disposed to reflect light incident in the spaces between the electrodes to reduce losses and to smooth the transitions in phase between adjacent electrodes.

REFERENCES:
patent: 5566007 (1996-10-01), Ikeda et al.
patent: 6091463 (2000-07-01), Robinson et al.
patent: 6348995 (2002-02-01), Hansen et al.
patent: 0 856767 (1998-08-01), None
patent: 0 899606 (1999-03-01), None
D. Ulrich, et al., “A Diffraction Based Polarisation Independent Lightbalve”.IEE Colloquium, London, Mar. 2000.
W A Crossland., et al., “Beam Steering Optical Switches Using LCOS: The “ROSES”Demonstrator”, IEE Colloquium, London, Mar. 2000.

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