HOLOGRAPHIC SYSTEMS

摘要

We describe apparatus and methods for generating an image holographically, and also spatial light modulators for use in such techniques. In particular we describe a spatial light modulator (SLM, 500) comprising a plurality of light modulating pixels (502) for diffracting a beam of coherent light to generate an image from a hologram displayed on said SLM, wherein at least one of said light modulating pixels is replaced with a light sensing pixel (504) to sense an intensity of said beam of coherent light at a position of the light sensing pixel. The SLM may be incorporated in an optical assembly for a holographic image projection system, in combination with a laser illumination system to illuminate the SLM and an optical output system to output an image.