We derive a golden rule to evaluate the limit on fringe resolution. The rule, which is derived from basic principles, takes into consideration the existence of mechanical vibration. We show that conventional interferometer systems are limited by the available vibration-isolation tables to approximately 1/1000 of a fringe. In principle, moiré deflectometry can yield a much better signal-to-noise ratio.
© 1989 Optical Society of America
Original Manuscript: February 21, 1989
Manuscript Accepted: April 6, 1989
Published: July 1, 1989
Oded Kafri, "Fundamental limit on accuracy in interferometry," Opt. Lett. 14, 657-658 (1989)