Since its introduction by Jennison in 1958, the closure-phase method for removing the effects of electrical path-length errors in radio astronomy and of atmospheric turbulence in optical astronomy has been based on the non-redundant-spacing triple interferometer. It is shown that through application of lucky imaging concepts it is possible to relax this condition, making closure-phase methods possible with redundantly spaced interferometer configurations and thereby widening their range of application. In particular, a quadruple-interferometer can, under lucky imaging conditions, be treated as though it were a triple interferometer. The slit-annulus aperture is investigated as a special case.
© 2008 Optical Society of America
Original Manuscript: June 9, 2008
Revised Manuscript: October 4, 2008
Manuscript Accepted: October 16, 2008
Published: November 7, 2008
William T. Rhodes, "Closure phase and lucky imaging," Appl. Opt. 48, A58-A62 (2009)