Abramson N
Appl Opt. 1971 Sep 1;10(9):2155-61. doi: 10.1364/AO.10.002155.
A new simple moiré equivalence to hologram interferometry has been investigated. We have found this equivalence to be very useful as an educational tool. The analogy to any interference pattern can be projected before a large auditorium using an ordinary overhead projector, and the fringes can be studied directly during formation. The equivalence is rather easily understood as it is only based on the loci of constant pathlength for the light traveling from the light source to the observer via the object. No, or very little, mathematical, optical, or linguistic preknowledge is needed, because the ellipsoids onto which the method is based can be demonstrated using just two nails and a string. The new equivalence method is also being tested in a simple analog computer, which, we hope, will be used as the holographer's sliderule.
一种与全息干涉测量法等效的新型简易莫尔条纹法已得到研究。我们发现这种等效性作为一种教育工具非常有用。利用普通投影仪可以在大礼堂前投射出与任何干涉图样的类比，并且在条纹形成过程中可以直接对其进行研究。这种等效性相当容易理解，因为它仅基于光从光源经物体传播到观察者的等光程轨迹。不需要或只需极少的数学、光学或语言方面的先验知识，因为仅用两根钉子和一根绳子就能演示该方法所基于的椭球体。这种新的等效方法也正在一台简易模拟计算机中进行测试，我们希望它能像全息摄影师的计算尺一样发挥作用。
