Simultaneous determination of the refractive index and wedge angle of an optical wedge plate using a photorefractive holographic interferometer |
| |
| Authors: | Y. R. Wang X. M. Qu L. Z. Cai B. M. Ma D. L. Sun |
| |
| Affiliation: | 1. Department of Optics , Shadong University , Jinan, 250100, P.R. China;2. Institute of Crystal Materials, Shandong University , Jinan, 250100, P.R. China |
| |
| Abstract: | Abstract 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. |
| |
| Keywords: | |
|
|
