Optical assembly, manufacturing method thereof and virtual reality device

The invention discloses an optical assembly and a virtual reality device, and belongs to the technical field of display. The optical assembly (20) comprises a first Fresnel lens (21) and a light blocking unit (22). The first Fresnel lens (21) is provided with a plurality of vertex angles (2111), and the light blocking unit (22) and at least part of the vertex angles (2111) in the plurality of vertex angles are overlapped in the direction parallel to the optical axis (L1) of the first Fresnel lens (21), so that the light emitting amount of the ineffective surface of the first Fresnel lens can be reduced, stray light emitted from the first Fresnel lens can be reduced, and the light emitting efficiency of the first Fresnel lens can be improved. The effect of improving the imaging quality of the optical assembly is achieved. 一种光学组件及虚拟现实装置，属于显示技术领域。光学组件(20)包括：第一菲涅尔透镜(21)和挡光单元(22)。第一菲涅尔透镜(21)具有多个顶角(2111)，挡光单元(22)与多个顶角中的至少部分顶角(2111)，在平行于第一菲涅尔透镜(21)的光轴(L1)的方向上具有交叠，如此可以减少第一菲涅尔透镜的无效面的出光量，进而可以减少从第一菲涅尔透镜出射的杂散光，达到了提高光学组件的