Stereo projection optical system

Abstract

The invention relates to a perspective projection optical system which comprises a polarized light converter, a time sharing wheel, a polarization converting element and an imaging engine that are arranged along the light path; wherein, the time sharing wheel is used for receiving the exit light of the polarized light converter and comprises a reflection area and a transmission area, and the exit light of the polarized light converter shines in the reflection area or the transmission area; the polarization converting element is arranged on the light path of the exit light of the reflection area or the transmission area of the time sharing wheel; and the imaging engine is arranged on the exit light path of the time sharing wheel and the polarization converting element. The perspective projection optical system can input lights with different polarization states for a digital micro mirror element alternately by the rotation of the time sharing wheel when in use, thus the left and right eyes of a looker can get images with different polarization states alternately; when the frequency of an input signal is high enough, the looker can watch perspective image information by wearing two polarizing filters which are vertical along the analyzing direction on the left and right eyes respectively.

Description

technical field [0001] The invention relates to a projection optical system, in particular to a stereoscopic projection optical system with a stereoscopic projection display function. Background technique [0002] In recent years, image projectors, especially digital projectors, have become popular as tools for displaying various information to viewers. Typically, these projectors are used to project computer-generated images onto a screen. To the viewer, the image projected by the image projector usually looks like a flat two-dimensional image, which cannot display any image depth information except the image itself. This display can be adapted to display a variety of information. However, in some cases, viewers will desire a projector that can reveal the depth of field or structural features of an image to a greater extent than a 2D display. [0003] One way of enabling an image displayed in two dimensions to give the image depth of field is by displaying the image ster...

AI Technical Summary

Problems solved by technology

While such systems are successfully used to form stereoscopic images, the cost and weight of the system is much higher than that of a single projector

Also, the optical alignment required for the two projectors is relatively difficult and time consuming

also, due to the weight and bulk of the two systems, it is extremely difficult to move such a system between the two locations, and there are potential image alignment issues

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