Patent ID: 9022598
Filing Date: 2015-05-05
Classification: F21V,G02B,Y10S

Abstract:
1. A light mixing illuminator for illuminating an object, comprising: an array of light emitting elements wherein the elements emit light of different wavelengths; a first optical device that focuses the light from the elements to a light pattern at the Fourier plane of the first optical device, so that the light pattern is a spatial Fourier Transform of the light from the elements; a mask having an aperture, wherein said mask is located at or near the Fourier plane and selectively blocks some of the spatial frequency components of light from the elements without blocking at least the zero spatial frequency components of the light from the elements; and an objective that projects the light passed by the aperture to a region on said object, said objective creating a spatial Fourier Transform in said region of the light passed by the aperture, and wherein the light emitting elements are arranged so that at least the zero spatial frequency components of light of the different wavelengths from the elements substantially overlap in said region on said object.