Zhu Yunlong, Vaillant Julien, François Manuel, Montay Guillaume, Bruyant Aurélien
Appl Opt. 2017 May 1;56(13):F97-F104. doi: 10.1364/AO.56.000F97.
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.
正弦相位调制（SPM）干涉仪用于通过简单的干涉设置精确测量复杂光场。最近，有人提出了一种广义锁相技术来优化相位调制干涉仪中的信号提取。本文展示了其在数字全息术以及数字全息干涉测量中的适用性。使用基于迈克尔逊干涉仪的紧凑型自制装置以32线对/毫米的空间分辨率观察散射样品表面；测量了平面外旋转，理论检测极限为0.004°。从理论和实验两方面对广义锁相检测与传统SPM干涉仪方法进行了比较。
