Light redirecting element comprising a forward diffracting region and a scattering region
US8619363B1 · kind B1 · utility
111Cited by
8References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 6, 2008 |
| Grant date | Dec 31, 2013 |
| Priority date | — |
| Expiry date | Mar 22, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B19/0066
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Improved Light Re-directing Elements (ILRE) are provided in which a diffracting region is combined with a light scattering region to correct angular chromatic dispersion. Further embodiments include optical devices and systems using ILRE to reduce moiré, efficiently re-direct light, improve spatial and angular color and luminance uniformity, and reduce wavelength dispersion. In one embodiment, the light scattering region is a volumetric anisotropic light scattering region. Embodiments are included for use of ILRE in light emitting devices, displays and light fixtures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.