Concentrator fresnel lens with varying draft angle
USRE49668E1 · kind E1 · reissue
0Cited by
5References
30Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 9, 2020 |
| Grant date | Sep 26, 2023 |
| Priority date | — |
| Expiry date | Nov 9, 2040 |
Classification
- Technology area (CPC —)General
Abstract
The present invention relates to a Fresnel lens and a respective mold, the lens comprising a plurality of draft facets, wherein the draft angle of the draft facets has at least two different angular values for two different draft facets, in particular, wherein the draft angle is bigger for a draft facet closer to the edge of the lens or, respectively, of the mold, than for a draft facet closer to the center of the lens or, respectively, of the mold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.