Illumination system
US9400394B2 · kind B2 · utility
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5References
11Claims
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Key dates
| Filing date | May 7, 2008 |
| Grant date | Jul 26, 2016 |
| Priority date | — |
| Expiry date | May 22, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B15/05
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An illumination system including at least one light source such as an electroluminescent element, e.g. a light emitting diode (LED), and at least one optical element whose surface is structured by diffraction and/or refraction type optical microstructures. In order to shape the beam, the optical element includes at least two sections whose optical microstructures and therefore optical properties are different from one another. The pattern of the microstructures in each of the at least two sections is, at least over a predetermined angular range, rotationally symmetric with respect to the optical axis or another symmetry axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.