Patent ID: 9341956
Filing Date: 2016-05-17
CPC Classification: G02B,G03F

Claim Text:
1. A spatial light modulator unit which modulates an intensity distribution of light, the unit comprising: a spatial light modulator arranged in an optical path of the light, which deflects a first part of the light and a second part of the light in different directions; a lens element arranged in the optical path on an incidence side of the spatial light modulator; and a light intensity modulator arranged in the optical path on an incidence side of the lens element, which modulates the light so that intensities of the first and second part of the light are different from each other on the spatial light modulator via the lens element, wherein the lens element forms an optical Fourier transform plane of a plane where the light intensity modulator is located, and wherein the spatial light modulator is located approximately at the optical Fourier transform plane.