Hamamatsu LCOS Spatial Light Modulator
The LCOS-SLM is a reflective type of pure phase Spatial Light Modulators (SLMs), based on Liquid Crystal on Silicon (LCOS) technology in which liquid crystal (LC) is controlled by a direct and accurate voltage, and can modulate a wavefront of light beam. The LCOS-SLMs are carefully designed to achieve high light utilization efficiency from various points of view, such as reflectivity, aperture ratio and diffraction noise due to the pixel structure.
http://eqdb.nrf.ac.za/equipment/other/hamamatsu-lcos-spatial-light-modulator
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