Composite holographic optical diffuser structure with high frequency overlay and method of fabrication thereof
US9568885B2 · kind B2 · utility
3Cited by
7References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 26, 2014 |
| Grant date | Feb 14, 2017 |
| Priority date | — |
| Expiry date | Aug 26, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2001/0439
- WIPO fieldOptics
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.