Modeling an optical correlator for visualising phase objects

In this work, an optical correlator was modeled for visualizing phase objects in order to comparatively study the effects of the Zernike filter and the vortex filter. The Zernike filter is well known in the phase contrast method, this filter allows you to visualize the phase of an optical object without using digital operations. To implement the Hilbert transform, a vortex filter, similar to the differentiation operation, is usually used, which makes it possible to obtain pseudo-relief images of a phase object. The conducted comparative study revealed the features of each of the filters in the phase contrast problem.