Abstract
ABSTRACT Electrically addressed spatial light modulators (SLM) are widely used in optical image processors to display not only input images but also a huge variety of optical components such as lenses, comple x filters and other diffractive elements. These components are fully programmable and dynamically controllable by computer thus bringing flexibility and new degrees of freedom to current optical and digital image processo rs. A good characterization is the most important step in the SLM initialization. The quality and effectiveness of the optical component addressed to the SLM strongly depends on the knowledge of the device response. This work deals with th e spatial and temporal character izations of reflective zero-twist liquid-crystal on silicon (LCoS) SLM. The signal is spatially modified before addressing it to the LCoS SLM to compensate for the distortions internally introduced by the device. For time varying optical components, the signal is also modified before addressing it to the LCoS SLM to compensate for the distortions internally introduced by the device when phase variations of 2 are required at high rate. Experimental results and applications in image processing are shown. Keywords: Liquid Crystal on Silicon Spatial Light Modulator (L CoS SLM), aberration compensation, diffractive optics, optical information processing
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