LIGHT MODULATOR HAVING A SWITCHABLE VOLUME GRATING
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United States of America Patent
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Issued Date -
Dec 26, 2013
app pub date -
Jun 19, 2013
filing date -
Jun 22, 2012
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Abandoned
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Abstract
Spatial light modulator configured as a periodic structure of polymer grating layers arranged essentially at equal distances and intermediate spaces to form a periodic grating structure. The surfaces bounding the periodic grating structure have electrodes influencing the refractive index of the active optical medium by an electric field. The electrodes have a pixelated arrangement and can be driven independently of each other with an electrical voltage. The orientation layer thickness and grating period of the periodic grating structure are configured so that they do not correspond to the Bragg condition for the light from at least one light source, and so that for light from the at least one light source incident on the spatial light modulator the light fraction deviated owing to Bragg diffraction is less than the undeviated transmitted light fraction.
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