Abstract

Multiple aperture optical systems have been used to increase the resolution of an optical system.^1-4 When such arrays of apertures are used in a coherent radar system, the transmitted wave fronts must be adjusted so that they appear to be sections of a larger coherent wave front. One common method of comparing sections of wave front is with a radial grating shearing interferometer.^5-7 Here a modification of this technique is described which allows it to be used to sense both the tilt and relative phase of adjacent optical channels in such a way that the required wave front correction signals can be generated with a minimum of computation.

© 1981 Optical Society of America