PHOTOSENSITIVE SURFACE SHAPING FOR OPTICAL HETERODYNING

摘要

A method and apparatus for optical heterodyning with photosensitive surfaces in which the amplitude of the output current is any desired function of the angle of incidence of the incident light beams. This is accomplished by shaping a photosensitive surface in accordance with the inverse Fourier transform of the desired amplitude of current response. The photosensitive surface is divided into two sections, each section containing one or more photosensitive regions. The sum of all currents produced in the first section is substracted from the sum of all currents produced in the second section and the difference current is applied to a resistor to produce the desired output voltage.