Grin type diffuser based on volume holographic material
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United States of America Patent
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Nov 15, 1994
Issued Date -
N/A
app pub date -
Mar 9, 1992
filing date -
Oct 2, 1990
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Abstract
A diffuser based on a phase volume holographic medium is recorded non-holographically with speckle which define non-discontinuous and smoothly varying change in the refractive index of the medium. The diffuser scatters light traveling from an entrance surface to an exit surfaces and reflection from the diffuser is substantially limited to Fresnel reflection from the entrance and exit surfaces and light exiting the exit surface is substantially non-specular.
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