| Abstract: | An analytic expression for the distribution density of a random variable at the output of a quadrant photodetector that performs sum-difference processing a, Poisson signal is obtained. The precision characteristics of a Hartmann sensor in the presence of Poisson and Gaussian noise are analyzed on the basis of the expression. Expressions for the mathematical expectation and variance of the noise-induced error variance and the correlation coefficents, of the results of reconstruction of the phase front are obtained. Translated from Izmeritel'naya Tekhnika, No. 9, pp. 38–42, September, 1999. |
