Camera flash with fresnel optic
US10036531B2 · kind B2 · utility
1Cited by
9References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 7, 2016 |
| Grant date | Jul 31, 2018 |
| Priority date | — |
| Expiry date | Sep 7, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/56
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A camera flash is provided with a lens element adjacent a light source, wherein the lens element has a plurality of concentric ridges projecting from a surface of the generally planar member to define facets of a Fresnel lens, and wherein the plurality of concentric ridges define a generally square or rectangular shape having rounded corners.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.