Abstract
Sinusoidal phase modulating (SPM) interferometers are used to precisely measure complex light fields with simple interferometric setups. Recently, a generalized lock-in technique has been proposed for optimizing the signal extraction in phase-modulated interferometers. This article shows its applicability in digital holography as well as digital holographic interferometry. A compact homemade setup based on the Michelson interferometer was used to observe the scattering sample surface with a spatial resolution of 32 LP/mm; out-of-plane rotation was measured with a theoretical detection limit of 0.004°. The comparison between the generalized lock-in detection and traditional SPM interferometer method was done theoretically and experimentally.
© 2017 Optical Society of America
Full Article | PDF ArticleMore Like This
Fajie Duan, Tingting Huang, Jiajia Jiang, Xiao Fu, and Ling Ma
Appl. Opt. 56(16) 4807-4813 (2017)
Osami Sasaki, Hirokazu Okazaki, and Makoto Sakai
Appl. Opt. 26(6) 1089-1093 (1987)
Osami Sasaki and Hirokazu Okazaki
Appl. Opt. 25(18) 3152-3158 (1986)