TOTAL INTERNAL REFLECTION PRISM FOR HIGH CONTRAST

摘要

The present invention relates to a TIR prism for the realization of high contrast ratio.;The present invention is a TIR prism consisting of a light source for generating illumination light, an in-prism to which the illumination light emitted from the light source is incident, and an out-prism in which the illumination light incident from the inprism is projected while one surface is in contact with the in-prism. And an optical system configured to selectively reflect the illumination light projected from the TIR prism, wherein the length of the inclined surface of the inprism in contact with the outprism is inclined surface of the outprism in contact with the inclined surface of the inprism. Provided is a TIR prism characterized in that it consists of an inprism formed by making one side shorter than the length of. Therefore, the light incident through the TIR prism from the light source to the panel is reflected by the panel, reflected back from the lower prism plane, and then reflected back from the prism plane, thereby preventing harmful light leakage from the projection lens. Can be.;TIR prism, high contrast ratio