Phase-shifting digital holography is a digital measurement technology of a complex optical field profile that uses focal plane array detectors without the loss of bandwidth. It has been known that the accuracy of phase-shifting digital holography is limited mainly by the phase tolerance of reference. In this Letter, it is revealed that the uncertainty in an expected signal is highly dependent on the phase of the signal itself, as well as the phase tolerance of the reference. Based on the uncertainty analysis, we propose a novel scheme of phase-shifting digital holography that exploits an uncertainty property to enhance the measurement accuracy even under significant reference phase tolerance.
© 2012 Optical Society of America
Original Manuscript: June 4, 2012
Revised Manuscript: September 22, 2012
Manuscript Accepted: September 24, 2012
Published: October 26, 2012
Joonku Hahn and Hwi Kim, "Uncertainty-managed phase-shifting digital holography," Opt. Lett. 37, 4492-4494 (2012)