Composite Holographic Optical Diffuser Structure with High Frequency Overlay and Method of Fabrication Thereof

摘要

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.

主权项

1. A method of suppressing visible optical artifacts on a substrate comprising the steps of:
a) coating a substrate with a photoresist recording media; b) exposing the substrate to form a first microstructure of a certain size, said first microstructure creating visible optical artifacts; c) exposing the substrate to form second microstructure smaller than said first microstructure; whereby said second microstructure suppress the visible optical artifacts.