De M, Sevigny L
Laboratoire d'Optique et Hyperfréquences, Université Laval, Québec, P.Q.
Appl Opt. 1967 Oct 1;6(10):1665-71. doi: 10.1364/AO.6.001665.
Holographic interferometry is certainly one of the most useful practical applications of holography. This subject was initiated principally by Stetson and Powell with a double exposure technique. In this paper a new technique is exposed which needs only one exposure of the photographic emulsion. This uses two reference beams instead of one as is customary in holography. Depending on the location of the phase object, two configurations are possible, each having some distinct properties. When the object is placed in the central beam, we get, upon reconstruction, an interferogram having twice the sensitivity of one coming from a single-pass interferometer. On the other hand if the object is located in one of the outer beams, the reconstruction step would simultaneously yield an interferogram of the phase object in a first order of diffraction, and the original object wave in a second order. Experimental confirmations are given.
全息干涉测量法无疑是全息术最有用的实际应用之一。这一课题主要由斯特森和鲍威尔用双曝光技术开创。本文介绍了一种新技术，该技术只需对感光乳剂进行一次曝光。它使用两束参考光束，而不是像全息术中通常那样只用一束。根据相位物体的位置，有两种配置方式，每种都有一些独特的特性。当物体置于中心光束中时，重建时我们会得到一张干涉图，其灵敏度是单通道干涉仪产生的干涉图的两倍。另一方面，如果物体位于外侧光束之一中，重建步骤将同时产生一阶衍射中的相位物体干涉图和二阶衍射中的原始物波。文中给出了实验验证。
