Patent ID: 7670006
Filing Date: 2010-03-02
Classification: G06F,H04N

Abstract:
1. A pattern projector comprising: a source of light to be projected; a spatial light modulator arranged in a spatial light modulator plane, said spatial light modulator receiving said light from said source of light and being configured to pass said light therethrough in a first pattern; and projection optics receiving said light from said spatial light modulator and being operative to project a desired second pattern onto a projection surface lying in a projection surface plane which is angled with respect to said spatial light modulator plane, said first pattern being a distortion of said desired second pattern configured such that keystone distortions resulting from the difference in angular orientations of said spatial light modulator plane and said projection surface plane are compensated, and said spatial light modulator comprising a matrix LCD and including a plurality of pixels, different ones of said plurality of pixels of said spatial light modulator having at least one of different sizes and different shapes.