Abstract

A micro projection system includes a primary prism as a light guide device. The primary prism has a bottom face and two slope faces. A light source module and a collimation lens are arranged at the bottom face of the primary prism to project red, green, and blue lights onto one of the slope faces of the primary prism to be consolidated by a wedge prism group and reflected toward a polarization beam splitting wedge prism arranged at another slope face, where the light is split into two polarized lights that are then emitted out of the primary prism to be processed and combined as light of consistent polarization by a lens array and a polarization conversion film so as to facilitate condensation and projection of the light by a polarization beam splitter and a projection lens.

IPC Classes  ?

• G03B 21/14 - Projectors or projection-type viewersAccessories therefor Details
• G03B 21/28 - Reflectors in projection beam
• G02B 17/04 - Catoptric systems, e.g. image erecting and reversing system using prisms only
• G02B 27/28 - Optical systems or apparatus not provided for by any of the groups , for polarising
• G02B 27/12 - Beam splitting or combining systems operating by refraction only
• G02B 27/14 - Beam splitting or combining systems operating by reflection only
• G03B 21/20 - Lamp housings
• G02B 27/10 - Beam splitting or combining systems
• G02B 27/09 - Beam shaping, e.g. changing the cross-sectioned area, not otherwise provided for
• G02B 5/04 - Prisms
• G03B 33/10 - Simultaneous recording or projection