Rw. Cohn, PSEUDORANDOM ENCODING OF COMPLEX-VALUED FUNCTIONS ONTO AMPLITUDE-COUPLED PHASE MODULATORS, Journal of the Optical Society of America. A, Optics, image science,and vision., 15(4), 1998, pp. 868-883
Pseudorandom encoding is a method of statistically approximating desir
ed complex values with those values that are achievable with a given s
patial light modulator. Originally developed for phase-only modulators
, pseudorandom encoding is extended to modulators for which amplitude
is a function of phase. This is accomplished by transforming the phase
statistics to compensate for the amplitude coupling. Example encoding
formulas are derived, evaluated, and compared with a noncompensating
pseudorandom-encoding algorithm. Compensating algorithms encode a smal
ler area of the complex plane and can produce more noise than is possi
ble far arbitrary pseudorandom algorithms. However, the encoding formu
las have greatly simplified numerical implementations. (C) 1998 Optica
l Society of America.