Optical: systems and elements – Diffraction – Using fourier transform spatial filtering
Patent
1994-10-24
1999-01-12
Epps, Georgia Y.
Optical: systems and elements
Diffraction
Using fourier transform spatial filtering
359256, 359277, G02B 2746
Patent
active
058597280
ABSTRACT:
A method and apparatus for modulating a light beam in an optical processing system is described. Preferably, an electrically-controlled polarizer unit and/or an analyzer unit are utilized in combination with a spatial light modulator and a controller. Preferably, the spatial light modulator comprises a pixelated birefringent medium such as a liquid crystal video display. The combination of the electrically controlled polarizer unit and analyzer unit make it simple and fast to reconfigure the modulation described by the Jones matrix of the spatial light modulator. A particular optical processing objective is provided to the controller. The controller performs calculations and supplies control signals to the polarizer unit, the analyzer unit, and the spatial light modulator in order to obtain the optical processing objective.
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Colin Soutar
Juday Richard D.
Cate James M.
Epps Georgia Y.
Robbins Thomas
The United States of America as represented by the Administrator
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