Instrument-making and information-measuring equipment

Biooperated Magnetophonotherapy System on the Basis of an Estimation of Physiological Indicators of the Man

At the present stage of development of medical instrument-making working out magnetotherapy apparatus with feedback automatically correcting parameters of medical influence according to physiological parameters of patients during a magnetotherapy session obtains an actual value. The purpose of this study was to research an influence of a magnetic field on change of physiological indicators of the man for working out magnetophonotherapy system with control algorithm of parameters of magnetic field influence and ultrasound on a biological tissue.

The Theory of Forming the Illumination Field on the Inner Surface of an Integrating Sphere of Photometer for Luminous Flux Measurement of the LEDs

Simplified mathematical models of the formation of the illumination field on the inner surface of the spherical photometer for three common schemes of constructive placement of the LED were proposed. The models are based on a combination of the method of successive reflections with the integration of illumination of rings around elementary segment symmetrically illuminated by LED. Each model takes into account the main design parameters of the photometer, which affect the level of light reflectance of the inner coating, and spatial orientation of the indicatrix of LED sources.

Polarization Characteristics of Electroluminiscence, that Accompanies Electric Breakdown of p–n-Structures on Silicon Carbide

Spectral dependence of the linear polarization extent of electroluminicsence, which accompanies the electric breakdown of alloyed p–n-structures, made on the base of SiC–4Н, 6Н, 15R polytypes, and аlso cubic silicon carbide in the range of 1,4–3,8 еВ have been obtained for the first time. The structures have been placed on the crystal faces, which are parallel and perpendicular to the crystallographic axis С. The luminescence was lead out from the side of thin р-region perpendicularly, and also at the sharp angle to the operating crystal face.

Infrared Hybrid Lenses with Corrected Spherical Aberration

This paper proposes the method of monochromatic lens spherical aberration correction by designing it as a hybrid lens. This method is based on the equation, which allows obtaining designing wavelength and focal distant of the hybrid lens diffractive part. The spherical aberration of the obtained diffractive part is equal to the refractive part of spherical aberration but has an opposite sign within a given clear aperture. Using this method, we calculate the plano-convex germanium hybrid lens with low f-number, which forms perfect spherical wavefront for the operating wavelength.

The influence of design features on durability of a double-ring dynamically tuned gyroscope

The present study addresses the issue of the strength characteristics of a double-ring dynamically tuned gyroscope (DTG). The experimental results indicate that the design features of an equally rigid resilient suspension set conditions for a significant reduction of its shifting ability. The analytic formulas for the determination of allowable load and the coordinates of weak sections in the resilient elements of the suspension are presented.

Reduction in Luminescence Enhancement Pulse Regime

This paper shows that significant energy losses in the Q-switched lasers are due to enhanced luminescence. We experimentally confirm the reduction of the relaxation time of the active centers with a high level of population inversion working levels. We propose a method of reducing losses of luminescence enhancement by using “complex” pump pulses. We analyze the use of “double” and “complex” pump pulses. Excitation of “double” pump pulse can reduce the loss by 7–10 %.

Algorithm the Automated Estimation of Ultrasound Effect on Biological Tissue

The article deals with control methods of the biological object using a biofeedback during physiotherapy. The algorithm of the automated estimation of ultrasound effect on a biological tissue is offered. We propose to use the temperature change of skin surface as feedback parameters during ultrasound irradiation and change of saturation change. The common use of parameters of temperature and saturation of biological tissues allows estimating the organism reaction to ultrasound influence, to prevent damage of tissues damage and to obtain the data on tissues adaptation.

Technique and Device for Measuring the Human Eye’s Depth of Focus

In this paper, we demonstrate that the depth of focus (DOF) of the eye’s optical system during implantation of intraocular lenses and aberration correction of presbyopian eyes should be identified and measured. The known methods and devices are described to determine the pseudo-accommodation volume of presbyopic eyes by subjective and objective methods. Their advantages and disadvantages are analyzed. We show that the main disadvantage of subjective methods is the impossibility to separate a pseudo-accommodation component caused by the eye’s optics from its total volume.

Errors Comppensation of Attitude and Heading Reference System at Object Swaying

The algorithm of accuracy increasing is developed for orientation system – strapdown Attitude and Heading Reference System (AHRS) at its installation on ships or other carrier objects with known distance from swaying center. The proposed algorithm allows to compensate AHRS errors caused by accelerations at object swaying, in autonomous mode where AHRS sensors (accelerometers and rate sensors) are used only. Accuracy of these errors compensation is evaluated. At this the proportional-integral variant of rate sensors correction from accelerometers is considered.

An Algorithm for Image Coding of Photographing Object Having a Large Range of Brightness

This paper proposes an algorithm for image coding of photographing object having a large range of brightness. It allows to achieve a high quality image of the photographing object by constructing it of the most informative images' elements of the object obtained under the same environmental conditions and different exposures. We also propose an algorithm for resulting HDR (High Dynamic Range) image coding from a series of LDR (Low Dynamic Range) images obtained by exposure bracketing or sensitivity bracketing of the optical receiver.