OPTICAL ALIGNMENT DEVICE AND SPATIAL BEAM SPLITTING PRISM THEREOF

摘要

An optical alignment device and a spatial beam splitting prism thereof are provided. The optical alignment device includes a polarized UV light source and a spatial beam splitting prism including a light-transmissive substrate. At least one of top and bottom surfaces of the substrate has a prism structure which is disposed by areas to have at least two refraction directions. When light rays emitted from the polarized UV light source are incident perpendicular to the spatial beam splitting prism, the light rays in a same area are deflected along a same slanting direction after being refracted by the prism structure, and the light rays in neighboring areas are deflected along different slanting directions after being refracted by the prism structure. The invention can achieve the purpose of performing multi-area alignments by only one time UV light irradiation, and also can save production time, reduce production difficulty and thereby increase productivity.

主权项

1. An optical alignment device comprising:
a polarized UV light source; a spatial beam splitting prism, comprising a light-transmissive substrate, wherein at least one of a top surface and a bottom surface of the light-transmissive substrate has a prism structure, the prism structure is disposed by areas to have at least two refraction directions, and thereby when light rays emitted from the polarized UV light source are incident perpendicular to the spatial beam splitting prism, the light rays in a same area would be deflected along a same slanting direction after being refracted by the prism structure, and the light rays in neighboring areas would be deflected along different slanting directions after being refracted by the prism structure.