Fresnel optical element and optical system using the same
US8194332B2 · kind B2 · utility
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8Claims
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Key dates
| Filing date | Sep 29, 2010 |
| Grant date | Jun 5, 2012 |
| Priority date | — |
| Expiry date | Oct 13, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B3/08
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A Fresnel optical element has a plurality of slopes that refract or reflect light, and the variation of the slope angle between adjacent slopes is constant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.