Light modulator for optical image projection

摘要

A spatial light modulator comprising an array-type liquid crystal panel, a polarization beam splitter, an oblique wave plate and a converging lens. The polarization beam splitter is orientated to direct a source light towards a reflective planar surface of the array-type liquid crystal panel. The oblique wave plate and converging lens are located between the polarization beam splitter and the array-type liquid crystal panel. The converging lens is configured to direct light from the reflective planar surface onto a facing surface of the polarization beam splitter.

主权项

1. A method of projecting an image, comprising:
directing a source light beam through a polarization beam splitter towards a reflective planar surface of a array-type liquid crystal panel, wherein said polarization beam splitter has a planar surface facing said reflective planar surface; reflecting said source light off of first and second sets of liquid crystal pixels of said array-type liquid crystal panel, said first and second sets of liquid crystal pixels causing reflected light to be in different polarization states; passing said reflected light through a converging lens, wherein said converging lens is located between said polarization beam splitter and said array-type liquid crystal panel, and, said converging lens directs said reflected light from said planar reflective surface to a facing surface of said polarization beam splitter; and passing said reflected light through an oblique wave plate.