Fresnel lens array with improved off-axis optical efficiency
US10539718B2 · kind B2 · utility
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23References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 17, 2017 |
| Grant date | Jan 21, 2020 |
| Priority date | — |
| Expiry date | Oct 26, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/193
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Fresnel lens arrays, devices, systems and methods of forming them are described herein. One array includes a Fresnel lens array, having a first portion including one or more defined areas of one or more Fresnel lenses, and a second portion including a first section that has its optical center located in a second section that is vertically above or below the first section and wherein each section is formed from a defined area of the one or more Fresnel lenses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.