Diffractive optical element, emission module and electronic equipment

The utility model discloses a diffractive optical element. The diffractive optical element comprises a substrate; the plurality of microstructures are formed on the substrate and are arranged in an array mode, the projection contour of each microstructure on the substrate is an axial symmetry graph relative to an axis, and the projection contour of each microstructure on the substrate is provided with a concave structure in the axis direction so that the projection contour can be in a V shape or a Y shape. In the diffractive optical element, the overall design of each microstructure can be realized by designing half of the area of each microstructure, the design time of the microstructure can be shortened, the memory and time for simulating the microstructure can be reduced, and the microstructure meeting the requirement can be quickly designed. The utility model also discloses a transmitting module and electronic equipment. 本申请公开了一种衍射光学元件，包括：基底；及多个微结构，形成于所述基底且呈阵列排布，每一个所述微结构在所述基底上的投影轮廓相对于一轴线为轴对称图形，所述微结构在所述基底上