Optical diffusion element and light emitting assembly for three-dimensional sensing

An optical diffusion element comprises a light-emitting surface, the light-emitting surface is provided with a plurality of microstructures, each microstructure is provided with a boundary, the boundary of each microstructure is completely connected with the boundary of the adjacent microstructure, each microstructure is provided with a surface profile, and the function expression of the surface profile is as follows: s (x) represents the surface profile of each microstructure on an x coordinate axis; the x value represents the vertical projection position of the surface profile on the x coordinate axis, the R value represents the curvature radius of the vertex of each microstructure, the kappa value represents the cone coefficient of each microstructure, and the microstructures have the same R value and kappa value. A light emitting assembly for three-dimensional sensing includes an optical diffusion element and a light source. The optical diffusion element and the light emitting assembly for three-dimension