Composite holographic optical diffuser structure with high frequency overlay and method of fabrication thereof
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United States of America Patent
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Feb 14, 2017
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Feb 26, 2015
app pub date -
Aug 26, 2014
filing date -
Aug 26, 2013
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Abstract
The optical diffuser mastering of the subject invention includes legacy microstructure surface relief patterns, along with smaller ones, overlaid on the larger ones. The characteristic features produced by the present invention will be found useful to eliminate visible structures in/on optical diffusers, such as those used in movie projection screens (utilizing either coherent (i.e., laser-generated) and non-coherent (e.g., lamp-generated) light), head-up displays (HUDs), laser projection viewing, etc., as the present invention produces much sharper images than those afforded by traditional holographic optical diffusers.
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