Iranian Journal of Physics Research

Interferometry by a transparent wedge

Document Type : Original Article

Authors

K Samavati 1
M Tavassoly 2
H Soleimani 1
H Salvdari 3
KH Hassani 2

1 Department of Physics, North Tehran Branch, Islamic Azad University, Tehran, Iran

2 Department of Physics, College of Science, University of Tehran, Tehran, Iran

3 Department of Physics, Ilam Branch, Islamic Azad University, Ilam, Iran

https://doi.org/10.47176/ijpr.21.4.51249
Abstract
In this article we show that a single transparent wedge or a plate with a wedge part can be used as a very simple and useful interferometer with numerous applications. This interferometer permits to modulate phase distribution on interference fringes to evaluate quantitatively the parallelism of a light beam and aberration of a wavefront, to specify the spectral line shape in a wide range, to measure the light wavelength and refractive indices of solids and liquids. In addition, it provides suitable beams for holographic study of phase objects and fabrication of diffraction gratings.
 

Keywords

interferometry
metrology
beam splitting
fringe modulation
Moiré technique
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