Abstract
Presented in this paper is a new method to measure the optical autocorrelation by the use of simple optical devices with two transparencies having same scales of the two-dimensional functions to be correlated. The experimental results of the photographic autocorrelation obtained by this simple device are shown, and some problems that occur when the autocorrelation of a sample function of a stochastic process is measured by this method are discussed, and consequently another proposed optical autocorrelator with one transparency instead of two is described. an example is discussed to show how to apply the measured two-dimensional autocorrelation for the operation of information processing of an optical detection system, which has been devised by the author.
