EXPERIMENTAL EVALUATION OF ENTROPY FOR TRANSMISSION HOLOGRAPHIC OPTICAL-ELEMENTS

An experimental study of transmission holographic optical elements is presented. Several important aspects related to the diffractional anal ysis of these elements have been considered. The case of the spherical object wave is analyzed in detail. The emphasis is on obtaining the e ntropy from the intensity distribution on an image plane. We use the c alculated entropy to locate experimentally the position of the best im age plane in the sense of minimal aberrations for a holographic lens. The comparison of experimental and theoretical results is presented an d good agreement between theory and experimentation has been obtained.