M. G. Tomilin

New Physical Method to Study Characteristics of the Surfaces Coated by Nematic Liquid Crystals

Abstract The properties of NLC thin layers, applicated upon an optical surface to visualize the defects of the latter, non-detectable by standard means, are studied here in polarized light.

LC Vision: New Application in Cancer Detection

Abstract The thin layers of homogeneously oriented NLC applied on the surface under investigation as a free film can be used as unusual recording media that permits to visualize the two-dimensional distribution of surface tension with high optical resolution and sensitivity. The changes of surface tension may detect different local defects without applying external electrical fields. On this basis a new non-destructive method to study the quality of different material surfaces has been developed. Here we discuss the new application of NLC technique for histological identification of malignancies.

LC Vision: The Dynamically Induced Structure Deformation Modes in Metal

Abstract A new application of the NLC technique in metallography for visualizing the translational and rotational deformation modes in metals after dynamic loading is discussed.

LC Vision: The Application to Magnetic Material Domains Investigations

ABSTRACT The information about local changes of H-field detecting domain structures or magnetic inhomogeneities on the surface of magnetic materials is important for science and high technology. It may be obtained with thin layers (≈ 1 μm) of oriented NLCs and polarizing microscope. In the paper we summarize the universal application of LC vision to magnetic domains investigation in mineralogy, metallography and optical technology. In mineralogy the objects of investigation were the sections of rocks with inclusions of ferromagnetic minerals. On the surface of materials applied for storage devices such as (YLa)3Fe5O12 thin films being grown on the substrate of Gd3Ga5O12 the labyrinthical, striped and cylindrical domain structures were observed in the case when the vector of H-field is parallel to optical polarization vector. The domains on the surface of thin amorphous Co based alloy ribbons were investigated using NLC materials with improved value of magnetic anisotropy. The NLC technique results were compared with the results obtained with magnetic emulsion technique.

LC vision: the new application to silicon surface defects testing

Abstract The thin layers of oriented NLC applied on the surface under investigation as a free film can visualize through a polarizing microscope structural inhomogeneities and microrelief defects. On this basis a nondestructive method to study substrates quality has been developed. The results of defect detection on different silicon surfaces are discussed for the first time.

The method of visualization of dynamic deformation modes in metals

A new non-destructive method to study the translational and rotational deformation modes in the metal target subjected to dynamic loading has been developed. This method is based on the nematic liquid crystal technique.

LC Vision Application to Solution Components Structure Investigation

For detecting the solution quality of different materials we suggested to study their solid components structure with NLCs. The operation process consists of solution drying, thin NLC layer application on solid components and imaging study of deformed NLC structures with polarizing microscopy and software that keep the information on solid components structure. We present new achievements in medicine to illustrate the results of non-invasive detecting of some cancer particularities and erythrocytes pathology. For perfume products we suggest new criterion for detecting scents smell durability. In beverage foods we suggest new technology to examine the difference between original products and counterfeit samples.

Optical method of diagnosing influenza viruses on the basis of nematic liquid crystals

This paper proposes a new polarization-microscope method of directly identifying influenza viruses and detecting their antigenic properties, based on nematic liquid crystals.

Using liquid crystals with giant diamagnetic anisotropy to study the domain structure in magnetic materials

This paper discusses the use of liquid crystals (LCs) to study the domain structure in magnetic materials. Domains on the surface of thin amorphous films made from cobalt-containing alloys have been studied by means of LCs that possess giant diamagnetic anisotropy. The results of using LCs are compared with the results obtained using magnetic emulsions.

Contrast and luminance of an image on a water screen subjected to external illumination by natural radiation sources

A photometric calculation of the illumination parameters of a projection system and a water dispersion screen has been carried out. The values of the parameters are used to substantiate the contrast difference of the image when there is external spatial irradiance of the screen in a