Electrical address circuits developed for driving fast-switching ferroelectric liquid-crystal spatial light modulators (SLM) can be programmed to increase the speed of much slower responding nematic liquid-crystal SLMs. Using an addressing circuit that can switch as fast as , voltages are programmed for values of phase that exceed the desired phase, and when the phase reaches the desired value, the voltage is switched to the required steady-state voltage. For a SLM that has a phase range of and that is programmed over a range, switching speed is reduced from to between 71 and . The speedup algorithm is applied to each pixel of the SLM together with a digital correction for a spatially nonuniform phase.
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