标题：Simultaneous determination of the refractive index and wedge angle of an optical wedge plate using a photorefractive holographic interferometer
作者：Wang, YR; Qu, XM; Cai, LZ; Ma, BM; Sun, DL
作者机构：[Wang, YR; Qu, XM; Cai, LZ; Ma, BM; Sun, DL]Shandong Univ, Dept Opt, Jinan 250100, Peoples R China.;[Wang, YR; Qu, XM; Cai, LZ; Ma, BM; 更多
通讯作者地址：[Wang, YR]Shandong Univ, Dept Opt, Jinan 250100, Peoples R China.
来源：JOURNAL OF MODERN OPTICS
摘要：A simple and effective method for simultaneously determining the refractive index and the wedge angle of an optical wedge plate is described. The method is based on a real-time holographic interferometer which uses a photorefractive crystal as the recording and reconstruction medium. The wedge sample under test is inserted into a rectangular cell that is placed in the object light beam of the holographic interferometer. The interference patterns produced before and after a reference liquid is poured into the cell are received by a CCD camera and stored in a computer, respectively. The refractive index and the wedge angle of the wedge sample are determined by measuring the number of fringes falling inside a fixed aperture. The principle of the method is analysed and some experimental results with adequate accuracy are given.