Solid state optical illumination apparatus
US8215814B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 23, 2009 |
| Grant date | Jul 10, 2012 |
| Priority date | — |
| Expiry date | Jun 26, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An optical system having a solid state light source, such as an LED of any spectrum, includes a lens that provides an output illumination pattern of uniform distribution over a remote and larger target. The lens does not have an axis of revolution. The lens has a generally non-circular outer shape in cross section and on top views, where the outer optical surfaces are angled one relative to another. The lens includes refractive and reflective active optical surfaces to split, direct and shape the incoming beam from the light source towards the target in the form of several angled beams of prescribed energies calculated as a function of the shape of the target and distance to the target. The lens has an inner primary and partially open optical cavity of a polygonal cross section facing the light source. This optical cavity has a number of refractive optical surfaces whose shape and number is determined by the number of and shape of the illumination beams generated in conjunction with the other surfaces of the lens. This novel optical system may include an array of white LEDs that generate the input illumination to an array of these lenses to insure the proper illumination level and …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.