An accuracy analysis of small angle measurement using the Optical Vortex Interferometer

In recent years a lot of effort has been put into testing and improving the idea of a three-beam interferometer known as Optical Vortex Interferometer (OVI). Devices based on the idea of an OVI allow, among other things, measuring small rotation angles of the wave [1]. In this paper complex statistical analysis has been used for the results of the small-angle rotation wave measuring method. The authors of this paper claim that the presented analysis of data handling error in a new measurement method increases the accuracy of the measured angle by better choice of random triplets.