ZLG Sensors with one Gas Discharge Gap in Each Sensor Half: Correction of Zero Drift DOI: 10.22184/1993-7296.FRos.2020.14.3.226.232
The paper presents the results of correction the non-magnetic component of zero-drift sensors with changing external temperatures and self-heating. Method is shown that allows to adjust the zero-drift improving accuracy characteristics of the device up to 1000 times. For the first time, testing ZLG were obtained results better than 0.01 ° / h at the rate of change the external temperature 0.3 ° / min.
Development of Acousto-Optic Device for Manipulating Micro-Objects DOI: 10.22184/1993-7296.FRos.2020.14.3.254.259
We discuss acousto-optic scanning characterized by high precision and repetition rate for manipulating micro-objects using optical tweezers. Bragg diffraction of light via ultrasonic waves allows creating robust solid-state devices for precise and fast laser beam deflection. We describe a scheme of the optical tweezers with PC‑driven two-dimensional scanning implemented by two sequential acousto-optical cells.
Study of Thin hBN / WS2 Films by Terahertz Time-Domain Spectroscopy DOI: 10.22184/1993-7296.FRos.2020.14.3.264.269
Estimates of the linear optical properties of promising material for the THz modulators manufacture, i. e., thin films of the mixture of tungsten disulfide and boron nitride with hexagonal lattice on polyethylene terephthalate (PET) substrate in the broadband terahertz frequency range are presented in this paper. In the range from 0.5 to 2.5 THz the films showed high transparency exceeding 90%. The calculated refractive index value 1.75 exceeded the ones for TPX and PET – materials used in the manufacture of THz optics.
Opto-Physical Measurements in Conditions of a Priori Uncertainty: Theoretical Aspects DOI: 10.22184/1993-7296.FRos.2020.14.3.270.280
A new look at the theory of optical and physical measurements in the framework of the concept of “a priori” is presented. Its use for assessing the state of biological tissues and determining the effectiveness of photodynamic therapy is considered. It is shown how to quickly evaluate the parameters of the studied object in the absence of a priori information about the studied object and the impossibility of carrying out calibration procedures. The basis of the solutions is the combination of methods of regression analysis and approximation of the functional relationships of the recorded signals with the optical characteristics of the media.
Application of Lasers in Surgery DOI: 10.22184/1993-7296.FRos.2020.14.3.282.291
The article provides an overview of the applications of lasers in surgery, special attention is paid to the use of laser instruments in the field of coloproctology. The morphological data obtained in studies of the effect of laser radiation on biological tissues are presented. It is noted that the reparative reaction of various tissues in response to high-intensity laser exposure is of the same type and consists in their general regeneration with final healing by day 20–21.
Features of the Interaction of Light with Graphene Nanostructures and Transition Metal Dichalcogenides DOI: 10.22184/1993-7296.FRos.2020.14.3.246.253
The aim of this work is to describe the optical spectra of the quasi-energies of charge carriers in a Dirac material. To achieve this goal, we solve the problem of finding the energy spectrum near the edge of the energy zones of grapheme ( ) and near the edge of the dichalcogenide energy zone (MoS2) ( ) irradiated by an electromagnetic field with a high photon energy and various intensities I, where the field is linearly polarized along the Y, X axis; The solution to this problem provides many zones by which it can be determined whether the material is a conductor, semiconductor or insulator.
Estimation of Sonoluminescence Temperature with the Ornstein Method DOI: 10.22184/1993-7296.FRos.2020.14.3.260.263
The temperature of Mn emission was determined with the Ornstein method using two atomic emission lines in the sonoluminescence spectrum of aqueous MnCl2 solution. The calculated temperature is about 3300K and consistent with the temperature estimated earlier using Swan molecular bands for aqueous solution of benzene (Didenko Y. T., McNamara III W.B., Suslick K. S., J. Am. Chem. Soc., 1999, V. 121, P. 5817).
Infrared Focal Plane Array Detectors: «Post Pandemic» Development Trends. Part I DOI: 10.22184/1993-7296.FRos.2020.14.3.234.244
The review deals with infrared detectors of thermal imaging technology. The devices are in demand in systems and complexes of civil and medical thermography, security and fire surveillance, personal night vision and security systems. A comparison of photonic and thermal detectors of various types by different world manufacturers is presented. An expert forecast of changes in market growth dynamics and trends of its post-pandemic development is given.