Optical system for a digital light projection system including a 3-channel LED array light engine
US7973996B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 20, 2009 |
| Grant date | Jul 5, 2011 |
| Priority date | — |
| Expiry date | Aug 20, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/14
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical system for a digital light projection system is provided. The optical system comprises a plurality of LED arrays, wherein each LED array comprises a plurality of LEDs. The optical system also comprises an optical concentrator element positioned substantially adjacent to each of the LED arrays, wherein each concentrator element totally internally reflects light emitted from the plurality of LEDs within the corresponding LED array so as to provide substantially uniform light at an output surface of each concentrator element, and wherein the concentrator element has a complex conic shape. The optical system preferably further comprises an optical combiner element, wherein the output surface of each concentrator element is positioned substantially adjacent to a corresponding side of the combiner element, and wherein the combiner element spatially combines the substantially uniform light provided at the output surface of each concentrator element so as to form substantially white light at an output surface of the combiner element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.