Ultra thin Fresnel lenses and other optical elements
US10795059B2 · kind B2 · utility
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18References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 20, 2017 |
| Grant date | Oct 6, 2020 |
| Priority date | — |
| Expiry date | Dec 25, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2003/0093
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Ultra thin Fresnel lenses and methods of forming the same are described herein. An optical element comprising an ultra thin Fresnel lens includes a plurality of Fresnel elements formed on a surface of a substrate. Each of the plurality of Fresnel surface elements has an angled facet portion and a shallow or substantially horizontal portion. The Fresnel surface elements can be formed, for example, by a hot stamp or cold transfer method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.