POLARIZATION SPLITTING DEVICE, POLARIZATION SPLITTING STRUCTURE AND PROJECTION DEVICE

摘要

A polarization splitting device, comprising: a first optical element (1), the first optical element (1) comprising a light incident surface, a polarization splitting interface and a reflective interface, and the polarization splitting interface and the reflective interface being correspondingly provided; incident light (11) is incident on the first optical element (1) through the light incident surface, and is split into a first light ray (12) and a second light ray (13) through the polarization splitting interface, the first light ray (12) is reflected by the polarization splitting interface and is then incident on the reflective interface, and is reflected by the reflective interface and then emits from the first optical element (1), and the second light ray (12) is transmitted through the polarization splitting interface and is then emitted from the first optical element (1). By controlling the propagation path of light, glue substances can be prevented from being damaged by direct irradiation of the light, thereby improving the working performance of the polarization splitting device.