Patent · US Active

Lighting device utilizing a double fresnel lens

US9464778B2 · kind B2 · utility

3Cited by

9References

21Claims

0Family size

Assignee

Cree, Inc. · US

Inventors

Zongjie Yuan · Ventura, US
Kurt S. Wilcox · Libertyville, US
Benjamin Beck · Boston, US
Lisa Barglind · Franksville, US
Steven Patkus · Sturtevant, US
William Couch · Wake Forest, US

Key dates

Filing date	Oct 29, 2014
Grant date	Oct 11, 2016
Priority date	—
Expiry date	Feb 26, 2035

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF21V5/045
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

According to one aspect, an optical lens includes a substrate having a first side and a second side opposite the first side. The optical lens includes a first pattern of Fresnel features having a first focal length disposed on the first side and a second pattern of Fresnel features having a second focal length disposed on the second side. The first pattern of Fresnel features is disposed perpendicular to the second pattern of Fresnel features, and the first focal length is different from the second focal length.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.