Elimination of selective polarization color errors in image projection, employs optical rotation of polarization planes and filtration

摘要

Using optical components, polarization planes are so rotated and/or filtered, that all color components have the same direction of polarization. In addition, intensity ratios of color components before entering and after leaving the optical system are the same. The color intensity relationship corresponds with that of the original signal An Independent claim is included for corresponding apparatus comprising an optical element (3), e.g. an LCD panel or a lambda /2 phase shift grating, projector lens (2) and prism assembly (6) processing polarized light (7) from the projector.