Abstract
Optical Vortex Interferometer (OVI) is a new type of interferometer which is based on the regular net of optical vortices. Optical vortices (OV) are the point like phase singularities. The point where the phase is undetermined is called the vortex point. In OVI the net is generated by the interference of three plane waves. There might be different application of such an instrument. It can be used to small-angle wave rotation measurements and to the orientation of the tilt axis. The resolution of the instrument is on the level of well known and tested classical interferometric methods. We expand the algorithms described in our previous articles to the testing of the parallel plates.
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