Patent ID: 9377179
Filing Date: 2016-06-28
CPC Classification: F21K,F21V,G02B,H01L

Claim Text:
1. A circular symmetric optical element for redirecting light, the light being emitted by a light source through a wavelength converting element, wherein the light emitted from the wavelength converting element has an average color c A and a wavelength distribution which depends on an emission angle from the wavelength converting element, wherein light having the average color c A has an emission angle t A , the optical element comprising: a first optical portion configured to receive and redirect light having emission angles from said wavelength converting element lower than the emission angle t a second optical portion configured to receive and redirect light having emission angles from said wavelength converting element higher than the emission angle t wherein the first and second optical portions are individually configured such that for light of each selected out-coupling angle of the optical element, there is light received and redirected by the first optical portion to the selected out-coupling angle of the optical element, and corresponding light received and redirected by the second optical portion to the selected out-coupling angle from said optical element such that the total light beam emitted from said optical element as seen in the far field have a homogeneous color.