Pseudorandom encoding for real-valued ternary spatial light modulators

Pseudorandom encoding with quantized real modulation values encodes only continuous real-valued functions. However, an arbitrary complex value can be represented if the desired value is first mapped to the closest real value realized by use of pseudorandom encoding. Examples of encoding real- and complex-valued functions illustrate performance improvements over conventional minimum distance mapping methods in reducing peak sidelobes and in improving the uniformity of spot arrays. (C) 1999 Optical Society of America. OCIS codes: 230.6120, 090.1760, 030.6600.