An autostereoscopic projection screen with projection displays a
stereoscopic image for receiving parallax images of right eye and left
eye. The autostereoscopic projection screen includes a
polarization-reserved diffuser, a microretarder, a polarizer, and a
parallax element. Parallax images of right eye and left eye pass through
the polarization-reserved diffuser and the microretarder for transferring
their polarization states. Parallax images of right eye and left eye with
specific polarization states will pass the polarizer and parallax element
for dividing images of right eye and left eye from parallax images. The
individual images separately enter viewing zones of right eye and left
eye to generate the stereoscopic-image for viewers.