Henshaw P D, Manlief S K
MIT Lincoln Laboratory, P.O. Box 73, Lexington, Massachusetts 02173, USA.
Appl Opt. 1982 May 15;21(10):1772-7. doi: 10.1364/AO.21.001772.
A shearing interferometer suitable for coherent phasing of multiple-aperture optical systems is described. The interferometer uses the properties of a rotating radial square wave grating to simplify interaperture phase measurements. A theoretical development and the results of experiments conducted at a wavelength of 10.6 microm are presented.