Geometric optical waveguide display system based on closely arranged microprisms

The invention relates to a geometric optical waveguide display system based on closely arranged microprisms, and the system is characterized in that a light beam emitted by a light source enters an optical waveguide after being collimated by a collimation system, is reflected by a reflecting surface of the optical waveguide, changes the angle, and is propagated in the optical waveguide in a large-angle total reflection manner; one part of light penetrates through the glass plate, is reflected by the bevel edge of the microprism, then enters the glass plate again through the light splitting area at a small angle and is emitted through the light emitting surface, and the rest light beams continue to be propagated backwards to realize pupil expansion. The microprism array for realizing the pupil expanding function is closely arranged, so that unnecessary light beam intervals can be reduced to the greatest extent; the proportion of reflected light and transmitted light is controlled by controlling coating films i