A general analysis of an n-grating interferometer under various conditions of illumination is presented, where n = 1, …, 4. Conditions for fringe localization and effects of misalignment are given. The lesser-known phenomenon of the imaging of a grating by a second grating is described from which the fringe-forming capacity of multiple-grating interferometers stems; this can occur regardless of the coherence of the source.
© 1975 Optical Society of America
Original Manuscript: December 16, 1974
Published: July 1, 1975
B. J. Chang, R. Alferness, and E. N. Leith, "Space-invariant achromatic grating interferometers: theory," Appl. Opt. 14, 1592-1600 (1975)