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US 8,619,363 B1Granted
Light redirecting element comprising a forward diffracting region and a scattering region
AssigneeFusion Optix, Inc.
InventorZane Coleman
Life of this patent
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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.
Claims12
An optical element comprising:
- a) an input surface;
- b) an output surface;
- c) a light transmissive diffractive region;
- d) a light scattering region optically coupled to the light transmissive diffractive region and disposed between the light transmissive diffractive region and the output surface;
- wherein a portion of incident light with a wavelength, λ, incident at an angle θ1 is diffracted forward by the light transmissive diffractive region and subsequently diffused by the light scattering region such that a ratio of angular diffusion of the light scattering region to angular chromatic dispersion of at least one light transmissive diffractive element is greater than 0.5.
2 more elements
Dependencies are inferred from the claim text.