Periscopic zoom motor with low stray light

Abstract

The utility model relates to a periscopic zoom motor with low stray light. The periscopic zoom motor comprises a shell, a hollow cavity is formed in the shell; a reflection assembly and a lens assembly are movably arranged in the hollow cavity; the shell is provided with a light inlet opposite to the incident plane of the prism; a first anti-reflection layer is arranged in the circumferential direction of one end surface, deviating from the incident surface, of the light inlet; a diaphragm is arranged in the circumferential direction of the emergent surface of the prism; the inner edge of the diaphragm is wave-shaped; a second anti-reflection layer is arranged on the inner side of the bottom surface of the hollow cavity; the lens assembly comprises a lens bracket and at least one lens arranged in the lens bracket; a hollow area is arranged on the lens support and located on the light emitting side of the lens. The first anti-reflection layer can effectively reduce stray light formed by reflection of light entering from the light inlet on the inner wall of the cavity, the second anti-reflection layer can absorb stray light leaked or reflected from the lens assembly, stray light interference caused by diffraction is reduced by the wavy inner edge, the hollowed-out area provides a clear channel for the stray light, and the anti-reflection effect is good. And the stray light can be directionally processed.

Images