Picart Pascal, Leval Julien, Mounier Denis, Gougeon Samuel
Ecole Nationale Supérieure d'Ingénieurs du Mans, rue Aristote, 72085 Le Mans 9, France.
Appl Opt. 2005 Jan 20;44(3):337-43. doi: 10.1364/ao.44.000337.
Features offered by the combination of time averaging and digital Fresnel holography are investigated. In particular, we introduce the concept of the zero-crossing phase of Bessel fringes, which allows a highly contrasted determination of the dark fringes in the hologram. We discuss some particularities of the digital reconstruction and show how time-averaged digital holography can be used to study vibration drifts. Experiment results are presented in the case of a loudspeaker under a sinusoidal excitation; digital and analogical holography are also compared.
研究了时间平均法与数字菲涅耳全息术相结合所提供的特性。特别是，我们引入了贝塞尔条纹零交叉相位的概念，这使得能够以高对比度确定全息图中的暗条纹。我们讨论了数字重建的一些特殊性，并展示了时间平均数字全息术如何用于研究振动漂移。给出了扬声器在正弦激励下的实验结果；还对数字全息术和模拟全息术进行了比较。
