This paper introduces an automatic system for maintaining the zero interference band in interferometric measurements. It facilitates precise measurements of maximum (Imax) and minimum (Imin) intensities across the investigated area for interference pattern visibility. The system employs a piezoceramic modulator for interference fringe generation, synchronized detectors for simultaneous Imax and Imin registration, and automatic phase control to ensure phase coherency. This system enhances measurement accuracy and efficiency, finding applications in interferometric experiments involving phase-inhomogeneous objects and dispersive media.
We have studied the formation of energy optical flows with phase singularities using a biaxial crystal during the propagation of light along its optical axes. We have expanded the theoretical foundations for forming a conoscope image in a biaxial crystal, as developed by Berry, to cover the case of arbitrary orientation of polarization elements. It has been shown that increasing the thickness of the crystal enhances the intensity gradient in the phase singularity, thereby enabling more reliable trapping and manipulation of nanoparticles. Reducing the scale of the phase singularity results in a sharper intensity distribution within the singularity, allowing for the capture of smaller nanoparticles.
Proposed and substantiated a method for 3d Mueller-matrix reproduction of the distributions of parameters of linear and circular birefringence and dichroism of partially depolarizing polymer films in publishing and printing business.
This work is aimed at generalizing the methods of laser polarimetry in the case of partially depolarizing optically anisotropic methyl acrylate layers. A method of differential Mueller-matrix mapping is proposed and substantiated for reproducing the distributions of the parameters of linear and circular birefringence and dichroism of partially depolarizing methyl acrylate layers.
A method of 3D Mueller-matrix reproduction of the distributions of the parameters of linear and circular birefringence and dichroism of partially depolarizing methyl acrylate layers is proposed and substantiated. The dynamics of the change in the value of the statistical moments of the 1st - 4th orders characterizing the distributions of the optical anisotropy parameters of the polycrystalline structure of the partially depolarizing methyl acrylate layer in various "phase" sections of its volume is investigated and analyzed.
Paper contains results of modeling of nanosized gratings and muscle tissue with different optical parameters. Nanogratings and muscle tissue modeling with calculations of scattered radiation characteristics were conducted in COMSOL Multiphysics environment. Dependencies of coefficients of transmission and reflection on angle of incidence for visible frequency range are also demonstrated.
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