Measuring the wedge of flat optical windows

被引：1
|
作者：
Arosa, Yago [1 ]
Diaz Rivas, Daniel [2 ]
Lopez Lago, Elena [1 ]
de la Fuente, Raul [1 ]
机构：
[1] Univ Santiago de Compostela, Dept Fis Aplicada, Nanomat Foton & Mat Branda NaFoMat, Campus Vida, Santiago De Compostela 15782, Spain
[2] Lund Univ, Lund, Sweden
来源：
OPTICS COMMUNICATIONS | 2021年 / 498卷
关键词：
Wedge; Shear; Cyclic interferometer; Fringe spacing; REFRACTIVE-INDEX; ANGLE; PARALLELISM; SURFACES; ERROR;
D O I：
10.1016/j.optcom.2021.127257
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A novel interferometric technique to measure small wedge angle of transparent windows is proposed. The technique is based on the measurement of the shift of the interference pattern generated by two sheared copies of a laser beam after crossing the optical wedge. A simple lens is used to combine the two beams in their focal plane and measurements are taken for different shears. It is not necessary to perform a spatial filtering of the laser beam since correlations are used to determine the parameters of the experiment. A sample with a wedge slightly greater than one minute is used to illustrate the method.
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页数：6
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