Spatial light modulator fourier transform

Details Spatial light modulator fourier transform Spatial light modulator fourier transform

2008-01-08

2008-01-08

Chowdhury, Tarifur (Department: 2886)

Optics: measuring and testing

By polarized light examination

C349S104000

Reexamination Certificate

active

07317527

ABSTRACT:
A filter to selectively block light from passing through the filter and to selectively permit light to pass through the filter. The filter includes an array with a plurality of individually addressable filter elements. Each filter element is selectively settable to have a variable transmittance to the light of between substantially zero percent and substantially one hundred percent. In this manner, the filter according to the present invention provides areas that pass only a portion of the light, and thus can block the light using patterns other than just an abrupt on/off filtering. By so doing, the filter is able to dramatically reduce, and in some embodiments eliminate, the light ringing that typically accompanies such on/off filters.

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