Lens having densely-distributed convex facets on its entrance and exit surfaces
US9739446B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2014 |
| Grant date | Aug 22, 2017 |
| Priority date | — |
| Expiry date | Mar 6, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Optical lens (3) for a LED comprising a lens body (10) having: —a light-entering section (1), where light from the LED enters the lens (3), having a cross-sectional dimension (D2) and recessed to accommodate a LED; —a light-emitting front face (2); —a frusto-conical shape (4), extending along a central axis between the light-entering section (1) and the light-emitting front face (2), the outer surface of which incorporating a plurality of densely-distributed convex facets (24); —a height (H) along said central axis; —a cross-sectional width (D1) at the level of the light-emitting front face (2). This optical lens enhances light utilization efficiency, avoids creating spots with chromatic aberration hence greatly improves color rendering.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.