Terahertz-infrared converter for visualization of sources of terahertz radiation

FIELD: physics.

SUBSTANCE: converter consists of a base and transducers of terahertz radiation into infrared radiation. The base is made in the form of a matrix, transparent in the terahertz and infrared ranges of frequencies. Transducers are evenly distributed in the volume of the matrix and are made in the form of gold nanoparticles. The diameter of gold nanoparticles is determined by the formula D≈[(8/π)⋅(mAu/ρ)⋅(EF/hν)]1/3, where D is a diameter of gold nanoparticles, mAu - a mass of the gold atom, ρ - a density of gold, EF - Fermi energy of gold, hν - a photon energy of terahertz radiation.

EFFECT: increasing the conversion efficiency and sensitivity of the device.

2 cl, 3 dwg, 2 tbl



Same patents:

FIELD: physics.

SUBSTANCE: optical device has an electro-optic substrate (3), having a main surface (3a), an optical waveguide structure formed on said substrate (3) and having two waveguide areas (7), spaced apart by a distance (S) for mutual optical coupling with each other, and an electrode structure having at least a first electrode (11). The substrate (3) has a crystalline structure with a Z section with a crystal axis Z, which is orthogonal to the main surface (3a), and has two oppositely polarised areas (20, 21) having opposite orientation of said crystal axis Z. The two waveguide areas (7) lie under the first electrode (11), each on the corresponding one of the two oppositely polarised areas (20, 21).

EFFECT: high operating frequency owing to shorter inter-waveguide distance between the optically coupled waveguide areas.

13 cl, 4 dwg

FIELD: instrument making.

SUBSTANCE: invention is related to the field of instrument making. Method provides for manufacturing of frequency converter, representing a set of active light guides, material of which contains centres of radiation frequency anti-Stokes conversion, by means of simultaneous formation of active light guides in channels of bearing matrix. Matrix material may play role of light guide reflecting shell.

EFFECT: higher accuracy of light guide mutual location.

2 cl

FIELD: physics.

SUBSTANCE: device contains anti-Stokes frequency transformer executed in the form of a set of active light guides and optically interfaced with the input and output optical systems. Some types of anti-Stokes frequency transformation centres are entered into material of active light guides. For realisation of anti-Stokes transformation of frequency upwards, sources of pumping radiation corresponding to types of centres of anti-Stokes transformation of frequency are entered in the device. After output optical system the colour-separting system which helps target signals to be guided on corresponding photofemale matrixes is entered. From exits of photofemale matrixes the image gained in the corresponding spectroscopic range, through solving device and the adder is displayed.

EFFECT: increase of informativeness and quality of object identification.

3 cl, 2 dwg

FIELD: physics, measuring.

SUBSTANCE: device is contained by the anti-Stokes frequency transformer executed in the form of gang of the active light guides and optically interfaced with input and target optical systems and also radiant of radiation of rating. Between set of the active light guides and input optical system the optical system of magnification of the input aperture of the active light guides, optically interfaced, as with the input extremities of each of the active light guides, and with input optical system and target optical system of formation of the visible image is entered.

EFFECT: increase of efficiency of use of IR useful area of image and sensitivity of device.

4 cl, 3 dwg

FIELD: optical engineering.

SUBSTANCE: device has antistokes frequency converter made in form of set of active light guides; converter is optically conjugated with input optical system and with pumping radiation source. Device also has second pumping radiation source which is optically conjugated with envelope of active light guides. The envelope of active light guides is made of material which has centers of antistokes cooling.

EFFECT: improved sensitivity; equalization of threshold sensitivity of active light guides; improved efficiency of operation.

3 cl, 5 dwg

FIELD: measurement technology.

SUBSTANCE: device has input infrared lens mounted in series with dichroic mirror, antistokes frequency converter made of set of active light guides and pumping radiation source. Front edge surface of the frequency converter is put into coincidence with image plane of input infrared lens. Active light guide set has dichroic coatings on front and rare edge surfaces. Pumping radiation source is mounted at rare edge surface or at front edge surface which has simultaneously to be input and output of antistokes frequency converter.

EFFECT: increased brightness of image.

4 cl, 2 dwg

FIELD: measurement equipment.

SUBSTANCE: invention relates to engine operation control and considers the method of monitoring of high-temperature area of gas-turbine engines. For implementation of the method in the stationary vane with internal cooling the monitoring ports are made. In the vane a distal end of the monitoring device is arranged.

EFFECT: monitoring device is designed with a possibility of change of position in the stationary vane with reference to the longitudinal axis of the vane and functional connection with ports for providing a necessary field of view of the area under consideration.

20 cl, 7 dwg

FIELD: physics, optics.

SUBSTANCE: invention relates to optical measurements and an optical system for an infrared thermometer. The optical system comprises a lens, an eyepiece, a light-splitting unit, a lens tube, a focusing eyepiece tube and a lens ring. There is a cap in the back part of the device for fixing the distance to the image formed by the lens and for protecting the device from dirt. The lens and the eyepiece can move along an optical axis. The lens is moved by rotating the focusing ring and the eyepiece is moved by extending the focusing eyepiece tube.

EFFECT: higher measurement accuracy and reliability of the device.

8 cl, 4 dwg

FIELD: instrumentation.

SUBSTANCE: detector comprises matrix of suspended bolometers located at lens focal plane, sensing circuit generating the flow of unprocessed values and gate. Process of correction comprises the steps that follow. Compilation of general table of unprocessed values. Determination of the table of shifts correction for detector current temperature in compliance with said general table and the set of stored tables of unprocessed values. Flow of unprocessed data is corrected with the help of the shifts correction table. In compliance with this invention, servicing procedure comprises check of conditions for replacement of the table from said general set by general table. In case this condition is satisfied, table of said set is replaced by general table. Check is performed to verify if a new set of tables exists after said replacement, more suitable than general set for further determination of shifts table.

EFFECT: correction of the shift of detector with thermo electronic cooler of pre-calibration.

12 cl, 9 dwg

FIELD: instrumentation.

SUBSTANCE: invention relates to a masking mechanism for a motion sensor unit. The proposed internal masking mechanism (20) is positioned inside the motion sensor unit (10) and can be relocated, while suspended, mainly - downwards and upwards resulting in selective unlocking or locking of the passive IR motion sensors (15) for long and short range operation zones accordingly. The internal masking mechanism (20) is essentially L- or reversed T-shaped where the opposite edges of the two parallel post (22) elements are separated by a space and equipped with a horizontal element (23) in the lower part of the two connected vertical elements of the post (22) with a switching handle (21) positioned between the two connected post (22) elements and controlled with the help of the external setting handle (14) through the setting hole (13) on the cylindrical cover (12) of the motion sensor unit (10). The visual control means for indication of long or short range may be additionally provided on the internal masking mechanism (20).

EFFECT: technical effect consists in the possibility of controlling main upward and downward relocation of the inner masking mechanism with the help of the external setting handle on the motion sensor unit and in provision of means for visual observation for indication of long or short range for the motion sensor unit.

5 cl, 12 dwg

FIELD: measurement equipment.

SUBSTANCE: method includes measurement of time dependence of thermal radiation recorded on a rear side of a processed material relative to the influencing laser radiation.

EFFECT: simplified process of measurements and expanded functional capabilities due to provision of the possibility to measure oscillations of temperature in deep melting channels.

2 cl, 2 dwg

FIELD: physics.

SUBSTANCE: apparatus has a black body model (5) in form of an electric furnace with a radiator (6) mounted on a base (2), a programmed temperature regulator (9), a thermocouple (7) for regulating temperature inside the radiator of the electric furnace, a turning adjustment mechanism (3), a photoelectric signal amplifier (10) and a computer (8). The computer is electrically connected to the turning adjustment mechanism and the photoelectric signal amplifier. The calibrated pyrometer is attached to the adjustment mechanism and is fixed n the base while being interfaced with the output hole of the black body model.

EFFECT: high measurement accuracy.

2 cl, 2 dwg

FIELD: physics.

SUBSTANCE: method for remote measurement of temperature field of objects is based on using a measuring thermal imager and involves selecting one or more reference areas on the surface of the analysed object, measuring temperature of these areas using a contact method, sending the results to the measuring thermal imager in order to determine the "pixel amplitude to temperature value" ration for specific conditions of the measurement session. Correcting the initial calibrating characteristic of the measuring thermal imager based on said ratios. Converting pixel amplitude values of the digital image based on the corrected calibrating characteristics into temperature values which are used during remote measurement of temperature in real time at control points from the reference areas. Temperature fields are determined by converting all recorded pixels of the digital image into temperature values, followed by smoothing the obtained values based on temperature of corresponding reference areas.

EFFECT: high accuracy of remote measurement of temperature field of aerospace objects under launching site or test site conditions with low extra hardware expenses.

FIELD: physics.

SUBSTANCE: component for detecting infrared electromagnetic radiation contains: a housing, bounding chamber (5) which is under a vacuum or low pressure, where one surface of the said housing has a window (4) which is transparent for the detected radiation. The said chamber has at least one detector (6), which is used for detecting radiation and is placed inside the said chamber near the transparent window, apparatus for pumping out residual gases or a gas absorbent for maintaining vacuum or low pressure in the chamber (5) on a permissible level, a thermal stabilisation device for guaranteeing control of temperature parametres of the detector/detectors, which consists of a heating resistive element (18) built into the base of the housing - substrate (1) on which a detector/detectors is/are mounted, where the said detector/detectors is/are connected to an interfacing circuit (7).

EFFECT: reduced expenses on making the temperature controlled device.

9 cl, 5 dwg

FIELD: measuring equipment.

SUBSTANCE: invention is related to methods and facilities for detection of heated bodies and melt metals temperature. Device for remote measurement of temperature comprises optical system, including protective glass, grin-microscope objective, grins-composers and spatially separated cords from elementary optical fibres, photodetectors and unit of primary processing, besides optical system is arranged as combined with separation of heated surface radiation into two header-distributors, moreover, one part of radiation is channeled in light guide cords, which are oriented towards reflecting surfaces with weak and strong radiating capacity with further channeling of radiations reflected from these surfaces in cords combined in support headers-radiators with light guide cords, comprising other part of radiation from controlled heated surface, and structurally isolated cord of information radiation.

EFFECT: device realises according method of remote temperature measurement.

2 cl, 1 dwg

FIELD: ferrous metallurgy; steel making process.

SUBSTANCE: pipe is made from doubled bushes closed at one end and open at other end. Both bushes are made from heat-resistant material possessing stability. Outer bush is provided with oxidation-resistance coat. Closed end of pipe is introduced into molten steel in such way that ratio of length of pipe below surface of molten steel to inner diameter of inner bush is equal to or exceeds 15 and ratio of said length to outer diameter of outer bush exceeds 3. Open end of pipe is connected with infra-red radiation detector. Temperature of molten steel is calculated by estimation of radiation emitted by inner bush at the end introduced into molten steel.

EFFECT: enhanced accuracy of measurements.

13 cl, 2 dwg

FIELD: electricity.

SUBSTANCE: metal-dielectric structure and method of its manufacturing are related to electronic industry and electronic engineering and may be used both in modern energy-saving systems and components being an integral part of modern processors, in particular for development of microsized and nanosized electromechanical systems. The metal-dielectric structure consists of dielectric and conducting layers made as an assembly of capillaries filled with metals to the required length, at that conducting layers are etched on selective basis at different butt ends and metalised. The conducting layers are represented by two different types of electroconductive materials etched on selective basis at different butt ends, at that the conductive layers may be made of semiconductor materials, conducting glass, carbon nanoparticles and nanotubes while the dielectric layers may be made of optical and electron-tube glass, polymer materials. In cross-section the dielectric and conducting layers may be made as concentric circles. The manufacturing method for the above metal-dielectric structure includes assembly, overstretching, stacking to the unit, at that upon multiple overstretching vacuum filling with conducting materials is performed, and butt ends are etched on selective basis with different chemical composites and then they are metalised.

EFFECT: invention allows increasing capacitance and breakdown voltage for capacitors.

5 cl, 7 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to pressure sensitive adhesives, suitable for use on a wide variety of substrates, including both high surface energy and low surface energy substrates. Pressure sensitive adhesives comprise an acrylate polymer and surface-modified nanoparticles. The surface-modified nanoparticles comprise a nanoparticle comprising a silica surface and surface modifying groups, covalently bonded to the silica surface of the nanoparticle. At least one surface modifying group is a polymeric silane surface modifying group. At least one surface modifying group is a non-polymeric silane surface modifying group.

EFFECT: disclosure also provides a method of preparing pressure sensitive adhesives, including exposing them to UVA and UVC radiation.

21 cl, 2 dwg, 12 tbl

FIELD: medicine, pharmaceutics.

SUBSTANCE: invention refers to pharmaceutical industry, namely to selenium nanocomposites of natural hepatotrophic galactose-containing polysaccharide matrixes, representing water-soluble orange-red powders containing zerovalent selenium (Se0) nanoparticles sized 1-100 nm in the quantitative content of 0.5 - 60 wt %, possessing antioxidant activity for treating and preventing redox-related pathologies, particularly for treating toxic liver damage, to a method for producing and to an antioxidant agent containing the above nanocomposites.

EFFECT: invention provides the targeted agent delivery to liver cells, as well as higher agent accessibility and lower toxic action of selenium.

7 cl, 11 ex, 4 tbl

FIELD: medicine.

SUBSTANCE: method is implemented as follows: preparing a mixture 1 by adding 0.5M aqueous solution of selenious acid 250 mcl in PEG 400 8 ml, mixing thoroughly in a magnetic mixture at min. 750 rpm with pH of the given mixture 7.55; that is followed by preparing a mixture 2 by adding 0.5M aqueous solution of hydrazine hydrochloride 250 mcl in PEG 400 8 ml, mixing thoroughly in a magnetic mixture at min. 750 rpm with pH of the given mixture 0.68. The mixture 1 is added to the mixture 2 by mixing thoroughly drop by drop. The prepared solution is dialysed against distilled water with removing PEG 400 and hydrazine hydrochloride; the surplus water is distilled off in a rotary evaporator at 60 rpm and 70°C. The prepared solution is added with a low-molecular compound specified in a group of: gentamicin, hexamethylene tetramine, methionine, cephalexin, indole-3-carbinol; pH is reduced to 7.2-7.4. The components are mixed in an amount to provide their content in the agent, wt %: biologically active low-molecular compound 0.001-5.0; selenium 0.0001-1.0; water up to 100.

EFFECT: simplifying the technology.

2 tbl, 3 ex, 1 dwg