High sag thick lens for use in an illumination apparatus
US8891171B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 8, 2013 |
| Grant date | Nov 18, 2014 |
| Priority date | — |
| Expiry date | May 20, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/855
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The high sag thick lens is for use in an illumination apparatus, such as a solid state light source. The lens is made of a first lens part having an optical active surface and a series of elongated baffles, the baffles having a top portion, the top portions defining a line that follows the curvature of the optical active surface to create a second lens part of uniform thickness. A second lens part is fused to the first lens part to create the lens. The second lens part has an optical active surface and a series of elongated baffles, the baffles having a thickness comparable to the thickness of the corresponding optical active surfaces. The first and the second baffles are intertwined along the entire length of their lateral surfaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.