DMD stray light elimination structure

Abstract

The utility model discloses a kind of DMD stray light structures, comprising: extinction pedestal, extinction pedestal is equipped with extinction groove, the extinction groove includes bottom groove;Extinction block, the extinction block is set in the extinction groove, the extinction block has bevel;Wherein, the inclination angle of the bevel is less than theoretical stray light incidence angle, the theoretical stray light incidence angle is the incidence angle of stray light reflected from DMD module relative to the bottom surface of the extinction block;At least one first extinction groove hole is equipped on the bevel;The extinction groove is configured to receive stray light reflected from the bevel and carry out second extinction;Efficient multiple stray light suppression: by bevel and first extinction groove hole on it constitute first heavy extinction, and the internal space of extinction groove constitutes second heavy extinction, two-stage stray light absorption mechanism of collaborative work is formed, and the attenuation efficiency of stray light is significantly improved.