561 results about "Middle infrared" patented technology

The invention is directed to a method of evaluating the signal of an infrared thermometer for measuring human body temperature, in which the infrared thermometer includes a probe adapted to receive thereon a probe cover or protective film sufficiently transparent to infrared radiation, and in which on a measuring operation performed with the probe cover or protective film in "installed" condition the signal is evaluated, so that a measuring operation is performed also when the probe cover or protective film is not installed, with an appropriate allowance being made for the consequently more intensive infrared radiation by different signal evaluation.

The invention relates to a method and a device for calculating the reflectivity of an earth surface, which are used for HJ-1A / B satellites. The method comprises the following steps of: 1) acquiring the optical thickness of atmospheric aerosol by using middle-infrared bands of an HJ-1B charge coupled device (CCD) and an infrared camera on the basis of a dark target method, and acquiring the optical thickness of the atmospheric aerosol by using an HJ-1A large-width quick revisit characteristic on the basis of an invariant target method; 2) calculating a solar zenith angle and a solar azimuth angle and observing the zenith angle and the azimuth angle on the basis of an HJ-1A / binary extensible markup language (BXML) file and image data; 3) simulating radiance Lm on a star through moderate resolution atmospheric transmission (MODTRAN) on the basis of parameters acquired in the steps 1) and 2); 4) establishing an earth surface reflectivity lookup table through the step 3); and 5) calibrating the atmosphere by using the lookup table according to an atmospheric parameter and an image to be calibrated. By the method and the device, the absorbing and scattering performance of the atmosphere on a remote sensing image can be effectively eliminated, the reflectivity of an earth surface target can be recovered, the bottleneck of industry application is eliminated, and the application range of environment disaster reduction moonlet data is further expanded.

The invention belongs to the technical field of optics, and particularly relates to an intermediate infrared absorption spectra based method for multi-component mixed gas qualitative and quantitative analysis and a system thereof. The method provided by the invention includes the steps as follows: a nonlinear optimization method is adopted, repeated fitting for the characteristic absorption spectra is performed through adopting a series of Voigt functions, so as to judge the absorption peaks of to-be-tested gases for forming the tested absorption peak, and further obtain a list of peak positions; default positions of peak values of spectra of different objects obtained from a standard data bank are compared with the peak positions in the list, so that the existence of a certain gas can beconfirmed within a certain acceptable error range; and the gas concentration can be acquired through the nonlinear optimization algorithm carried out by the computer. The method provided by the invention can obtain an accurate result through numerical analysis even if positions of spectrum lines or line widths tested by an instrument change to a certain extent under the influence of an environment, and does not need an independent spectrometer to obtain reference spectra under different experiment conditions; and meanwhile, the invention provides the system for realizing the method for the qualitative and quantitative analysis.

A method and apparatus for visually observing thermal disparities between like vehicular components that are spatially separated. The invention uses only one infrared camera and one or more surfaces to reflect the thermal image of spatially separated components into the camera. The image generated by the infrared camera can be sent directly to a viewing apparatus or to a computer capable of controlling internal camera functions as well and providing video processing and analysis capabilities.

The invention discloses a Cr series high-temperature solar selective absorbing coating and a preparation method thereof. The coating consists of an infrared reflection layer, an absorption layer and an antireflection layer in turn from the bottom to the surface, wherein the first infrared reflection layer consists of three membranes; the middle infrared reflection layer is a Ag membrane of which the upside and downside are plated with a protective film that is any one of a chromic oxide (Cr2O3) film and an aluminum oxide (Al2O3) film respectively; the second absorption layer has two sub-layer structures both of the which are AlCrN+AlCr films, the volume percentage of the first sub-layer AlCr is greater than that of the second sub-layer AlCr; and the third antireflection layer is any one of Cr2O3 film and Al2O3 film. The preparation method comprises the steps of: preparing the infrared emission layer on the substrate surface by adopting a pure metal target magnetron sputtering process; preparing the second absorption layer on the first layer by adopting a Cr target and Al target middle-frequency magnetron sputtering process; and preparing the third antireflection layer on the second layer by adopting a metal target middle-frequency magnetron sputtering process.

The invention relates to a process for preparing a silicon dioxide nano-cone array which has large area, controllable interval, controllable cycle and sequential arrangement, and is directly fabricated on a substrate. The process includes three steps: cleaning the quartz plate substrate and performing hydrophilic process on the surface of the quartz plate substrate; preparing polystyrene single-layer colloidal crystals; fabricating the silicon dioxide nano-cone array. The silicon dioxide nano-cone array prepared by the process has extremely excellent wide-band anti-reflection and transmission increasing properties, can realize effectively reducing surface reflection loss and increasing light transmission from ultraviolet light to visible light (350nm to 800 nm) and then to the inside of middle-infrared-band (800nm to 2.5 micrometer) by controlling the cycle. Simultaneously, by changing nature of the surface of nano-cones, antifogging and super-hydrophobic surfaces can be fabricated. The process is simple, comparatively controllable and has wide application prospect on photoelectric devices with low cost and large area and on fabrication of anti-reflection surfaces.

The invention pertains to the technical field of vehicle construction, discloses a blind zone detecting and alarm device for vehicles, wherein, an infrared probe (1) is multiple passive infrared receivers; the alarm device is divided into an audible alarm device and a light stroboflash alarm device. The infrared probe (1), the audible alarm device and the light stroboflash alarm device are all connected with the operating control unit of the vehicle by signal lines. Detection zones cover an A pole blind zone and blind zones at the side and the back of the vehicle by adopting the technical proposal, and the disadvantages of poor active infrared anti-jamming performance and complex structure are overcome; the passive infrared detector does not emit any radiation and has the advantages of quite low device power consumption, high sensitivity, comparatively good invisibility, low cost, convenient arrangement and being artistic and practical; the mode combined with the audible alarm and the light stroboflash alarm gives drivers sufficient alarm information to guarantee driving safety.

A method for the evaluation of the ultrastructure of connective tissue, such as cartilage, including (a) providing a probe operative in the near-infrared or mid-infrared region of the electromagnetic spectrum, (b) positioning the probe either to be in contact with the connective tissue (for detecting attenuated total reflectance) or within a sufficient distance from the surface of the connective tissue (for detecting reflection), (c) detecting infrared radiation which penetrates the surface of the connective tissue for detecting attenuated total reflectance or which reflects off the surface of the connective tissue and (d) analyzing the infrared radiation from step (c) for at least one of peak height, peak area and frequency, and comparing at least one of the peak height, the peak area and the frequency for established values for at least one of peak height, peak area and frequency for normal connective tissue to detect a modification in the molecular structure of the connective tissue.

This invention relates to a method for verifying unseparately extracted multilever macro-finger makrs with infrared spectrum of Chinese medicine characterizing in cutting, crushing, and screening medicine to add potassium bromide powder into the medicine powder smaller than 200 mesh for table sampling to determine the middle infrared spectrum, diffuse reflection near infrared, diffuse reflection middle infrared spectrum, reflection spectrum and attenuation total reflection spectrum to get and draw the second-order derivative spectrum diagram of related spectrum, to determine the samples two-dimensional celated infrared spection to be compared in level.

To provide a laminated glass for a vehicle window which can prevent the temperature increase in a vehicle.An infrared reflection glass plate which is a glass plate with an infrared reflection film, wherein the infrared reflection film has a stacked coating film (X) having a coating film (1) made of a high refractive index inorganic material having a refractive index of at least 1.90 and a coating film (2) made of a low refractive index inorganic material having a refractive index of at most 1.56 alternately stacked in this order from the glass plate side; the total number of the coating film (1) and the coating film (2) is at least 3; and the geometrical thickness of the coating film (1) is from 70 to 150 nm and the geometrical thickness of the coating film (2) is from 100 to 200 nm.

A toner formulation is disclosed comprising a binder and an IR absorbing black pigment at a concentration of 0.25-2.0% by weight, including one or more infrared transmissive pigments, wherein the infrared transmissive pigments are configured to provide a black color. Such toner formulation may provide a response to a toner patch sensor to indicate a mass per unit area of 0.1-1.5 mg / cm2 or a reflectance relative to a substrate to define a reflectance ratio that varies relative to L* values for the toner over the range L*=0-50 or a bulk reflectivity of greater than 6.0% for a portion of the wavelength range of 850-2000 nanometers.

The invention discloses a method and device for rapidly measuring sidewall appearance of a micro-nano deep groove structure, which can simultaneously and rapidly measure the parameters of the sidewall appearance of the micro-nano deep groove structure, such as line width, groove depth, sidewall angle, sidewall roughness and the like. The method comprises the steps of: projecting elliptical polarized lights, which is obtained by polarizing light beams with the wavelengths ranging from near infrared waveband to middle infrared waveband, onto the surface of a structure to be measured; collecting zero-level diffraction signals on the surface of the structure to be measured, and calculating to obtain a measured infrared spectroscopic ellipsometry of the micro-nano deep groove structure; calculating theoretical spectroscopic ellipsometries in the near infrared waveband and the middle infrared waveband respectively by using a wavelength allocation modeling method, matching the theoretical spectroscopic ellipsometries with the infrared spectroscopic ellipsometry measured in the experiment by using a stepwise spectral inversion method, and sequentially extracting the groove structure parameter and the roughness parameter. The device comprises an infrared light source, first, second, third and fourth off-axis parabolic mirrors, a Michelson's interferometer, a planar reflector, a polarizer, a sample bench, an analyzer, a detector and a computer; and the method is a noncontact, nondestructive low-cost method for rapidly measuring the sidewall appearance.

The invention discloses a photoelectric detection device of a rotary multi-sensor photoelectric detection radar. A servo rotating system similar to the radar can be used for carrying out 360-degree continuous rotation scanning or carrying out fan scanning on a specific airspace. The invention does not emit any electromagnetic waves, an array formed by a passive photoelectric sensor-low-light CCD (covering visible light and near infrared rays) and a thermal infrared imager (in the middle-infrared band of 3 to 5 micrometers) in the refrigeration is adopted for realizing 24-hour searching and detection on objectives in the air or on the ground, after moving objectives are found, two tracking and identification units are used for carrying out continuous tracking on the objectives and identifying the objectives according to the shapes of the objectives, and various factors such as the position, the altitude, the distance, the speed and the like of the objectives are calculated in a method of combining double-station crossed positioning and three-dimensional image distance measurement. The rotary multi-sensor photoelectric radar becomes the photoelectric radar with all functions of the radar.

The invention provides an anti-reflective micro-nano structure of sapphire surface and a preparation method thereof. The method comprises the following steps: preparing a layer of metal aluminium membrane on surface of the sapphire; performing twice anodization on the metal aluminium membrane to form an ordered porous alumina film with uniform surface; and performing a two-step heat treatment on the porous alumina film to form the sapphire with surface having the poriform micro-nano structure. The preparation method has the advantages of simple process and can obviously reduce the preparation cost; the prepared sapphire has the micro-nano structure on the surface, has obvious anti-reflective anti-reflection effect on visible light or middle-infrared band, and self cleaning property for the surface is better.

A building structure having a high efficiency solar control system is provided. The building structure may have a window defined by a sheet of glass and a film mounted to its exterior side. The film may reflect solar radiation in the near and mid infrared ranges yet allow high transmission of light in the visible range such that the occupants of the building structure may view his / her surroundings through the window. The film may have a layer of silver which reflects the solar radiation in the near and mid infrared ranges. Since the silver is susceptible to oxidation and turns the silver into a black body which absorbs the near and mid infrared radiation, the film may be designed to slow the rate of oxidation of the silver layer to an acceptable level. The silver layer may be sandwiched between the glass which does not allow oxygen to diffuse there through and reach the layer of silver and a stack of sacrificial layers having a certain thickness which slows down the rate of oxygen diffusion to an acceptable level.

The invention relates to an identification method of an infrared spectrum, in particular to a pueraria lobata starch adulteration identification method based on principal component analysis (PCA). The method specifically comprises the following steps: tabletting pueraria lobata starch or starch composition mixed with other starch in the pueraria lobata starch to prepare samples and carrying out intermediate infrared scanning under the condition that the wavelength range is 4000-500cm<-1> to obtain the infrared spectrum; carrying out PCA after carrying out baseline adjustment, smoothing processing and vector normalization processing on the infrared spectrum to obtain the principal component score; and carrying out discriminant analysis (DA) on the obtained principal component score and judging pueraria lobata starch adulteration from the DA result. The method has the following beneficial effects: the infrared spectrum of starch is introduced into study; in combination with the chemical analysis and meterage method, the method is simple and easy to operate, has the advantages of rapidness and accuracy; and the correction recognition rate is 100%.

The invention provides novel non-linear optical crystal gallium germanium barium sulfide, and a growing method and application thereof. The chemical formula is BaGa2GeS6 (short for BGGS). The novel non-linear optical crystal gallium germanium barium sulfide has the chemical formula of BaGa2GeS6, has an asymmetrical center structure and belongs to a trigonal crystal system, wherein the space group is R3; and cell parameters are that: a=9.5967(5) Angstrom, b=9.5967(5) Angstrom, c=8.6712(7) Angstrom, alpha=90 degrees, beta=90 degrees, gamma=120 degrees, Z=1, and V=691.62 Angstrom3. The clock multiplier factor of the BaGa2GeS6 is 0.8 time that of AgGaS2. The BGGS compound is obtained by sintering at high temperature through a solid phase synthesis method. The BGGS monocrystal can grow successfully by a crucible descending method. The BaGa2GeS6 has a non-linear optical effect, is not dissolved in dilute acid, has high chemical stability, can be widely applied in various non-linear optical fields, and can develop non-linear optical application of a middle infrared band.

The invention discloses a device and a method for detecting sulfur dioxide gas. The device comprises a quantum cascade laser (1) and a driving power supply (7) thereof, a ZnSe lens (2), a gas chamber (3), a double-path microphone power supply (4), a phase-locking amplifier (5) and a computer (6), wherein the driving power supply (7) excites the quantum cascade laser (1) to emit middle infrared light with the wavelength of 7.36 micrometers, the middle infrared light is converged into parallel light through the ZnSe lens (2) and enters the gas chamber (3) in which sound signals are generated, the sound signals are respectively collected and transmitted to the double-path microphone power supply (4) by a pair of high-sensitivity microphones in the gas chamber and then are transformed into electric signals, the generated electric signals are inputted to the phase-locking amplifier (5) for differencing and signal extraction, and finally signal values are recorded and stored by the computer (6), thereby obtaining the concentration of gas to be detected by calculating the signal values. The invention solves the problems of high time consumption, insensitive reaction, complicated operation and tedious equipment maintenance of the traditional method for measuring gas concentrations.

The invention discloses a middle-infrared waveband transmission type sub-wavelength metal grating, which belongs to the technical field of function material and device. The metal grating comprises a zinc selenide glass substrate and a metal film which is located on the surface of the zinc selenide glass substrate and is provided with a periodicity hole structure; and in the periodicity hole structure, radius r of single hole is smaller than 1 / 2 of hole period P, and the hole period P is 1-10mu. The middle-infrared waveband transmission type sub-wavelength metal grating uses a sub-wavelength periodicity structure of less than infrared wavelength to realize selective transmission of infrared rays in the middle-infrared waveband of 2.5-25mu, and meanwhile shields the function of microwave millimeter waveband electromagnetic wave. The middle-infrared waveband transmission type sub-wavelength metal grating has the characteristics of simple structure and easy implementation, and can be applied to infrared detection device requiring electromagnetic shielding.

The invention relates to an optical fiber sensor, in particular to a low-refraction-index PCF-SPR (photonic crystal fiber-surface plasmon resonance) sensor working at a middle infrared band. Inner layer air holes, outer layer air holes and two symmetrically distributed round passages of liquid to be tested are arranged in a cladding layer of optical fiber; a gold film is plated on the inner wall of the round passage of liquid to be tested; a tiny opening is formed in the outer side of the round passage of liquid to be tested; the inner layer air holes and the outer layer air holes are in regular hexagon staggered arrangement; the radius of the outer layer air hole is greater than the radius of the inner layer air hole; the optical fiber is made of silicon dioxide; the optical fiber is refraction index guide type photonic crystal fiber. The resonance wavelength is at the middle infrared band; the low-refraction-index liquid to be tested can be detected; particulates in a solution to be tested can be selectively filtered; the size is small; the microminiaturization of the sensor is easily realized; the average spectrum sensitivity reaches up to 8850 nm / RIU. The sensor is mainly used for detecting the refraction index of the solution to be tested and performing selective detection analysis on chemical substances in the solution.

The present invention relates to an infrared transmitting oxyfluoride glass. It is characterized by that in the AlF3-MeF2-MF3 fluoride glass composition the TeO2 or tellurite is added, the range of the composition is as follows: (component, mol%) TeO2 3-50, AlF3 20-55, MgF2+CaF2+SrF2+BaF2 25-60, LaF3+YbF3+YF3 0-40. Said glass composition has good glass-forming property, and is suitable for large size material, and has good transmittance of near ultraviolet and middle infrared wave band.

The invention provides a middle-infrared band athermal optical compensation continuous zooming optical system, and aims at providing the middle-infrared band zooming optical structure which can achieve the continuous change, from 60mm to 150mm, of an optical passive thermal difference and a focal distance in -45 DEG C to 60 DEG C. The system is achieved through the technical scheme including that in a lens cone optical system, a dome cover (9) which is made of hot-pressing magnesium fluoride (MgF2) is arranged between an object plane (10) and a front fixed lens group (8), a middle fixed lens group (6) is arranged between a concave lens (701) and a concave lens (702) of a zooming lens group (7), the space between the concave lens (701) and the concave lens (702) remains unchanged, a motor which is fixedly connected on a lens cone serves as a driving source of the two lens concave lenses, a gear-guide rail mechanism drives the zooming lens group (7) to move in an optical axis direction of the optical system in a back-and-forth and linear mode, continuous zooming is achieved through moving in the optical axis direction in a back-and-forth mode, and the zooming lens group (7), the front fixed lens group (8), the middle fixed lens group (6) and a rear fixed lens group (5) collectively form a complete imaging system.

The invention belongs to the technical field of optical films, and specifically relates to an all-dielectric film color separation element reflected in a visible light waveband (0.6-0.9 [mu]m) and a laser waveband (1.06 [mu]m) and transmitted in a middle-infrared waveband (3.0-5.0 [mu]m) and a design method. According to the color separation element and the design method, light splitting is performed according to the methods of visible light and laser reflection and infrared transmission, a silicon material substrate is designed by employing an all-dielectric film material, which is different from a conventional dielectric-metal-dielectric film structure, the average light-splitting efficiency of the visible light and laser wavebands reaches more than 98%, and the average light-splitting efficiency of the middle-infrared waveband reaches more than 97%.

The invention discloses a superhydrophobic daytime passive radiation cooling fabric. The superhydrophobic daytime passive radiation cooling fabric comprises a fiber fabric, a daytime passive radiationcoating and a superhydrophobic coating, wherein the surface of the fiber fabric is coated with the daytime passive radiation coating and the superhydrophobic coating sequentially; the daytime passiveradiation coating is aluminum phosphate radiation particle coating; and the aluminum phosphate radiation particle coating has high reflection to visible light-near-infrared sunlight and has high emissivity in an atmospheric window of 8-13 [mu]m. The invention further discloses a preparation method of the superhydrophobic daytime passive radiation cooling fabric. The superhydrophobic daytime passive radiation cooling fabric is formed by multi-layer functional coatings through composite assembly, so that an ordinary fiber fabric has excellent spectrum-selectivity characteristics of high reflection to visible-near-infrared visible light and infrared intense radiation in the atmospheric window (8-13 [mu]m); then efficient radiation cooling under sunlight can be achieved; and meanwhile, the superhydrophobic coating on the outermost layer enables the fiber fabric to have excellent antifouling and self-cleaning effects.

The invention discloses a middle infrared imaging optical system. The system comprises a front group of lenses, a rear group of lenses and a detector which are positioned on the same optical axis OO', wherein a target forms a primary real image in front of the rear group of lenses through the front group of lenses; the primary real image forms a secondary image on a focal plane through the rear group of lenses; the focal length of each of the front group of lenses is 50mm and the total focal length is 200mm; the magnification ratio of the rear group of lenses is 4; the image surface is increased by about 16 units every time when primary image distance is decreased by 1 unit; and the detector is a refrigerating detector. The system is small and exquisite and compact and can achieve good image quality; and the defocusing caused by temperature variation is compensated by controlling the position of the rear group, the system can work normally within a wide temperature range without refocusing.

The invention discloses an infrared detecting device and method for target recognition in a sea surface sun bright band. According to the infrared detecting device, the lenses of two middle infrared cameras form an angle; an infrared polarizer is arranged in front of the lens of a middle infrared camera; a wire gating polarization device is arranged at the light path intersection in front of the lenses of two middle infrared cameras; a diaphragm is arranged on the light path in front of and the wire gating polarization device; a germanium sealing window is arranged in front of the diaphragm; the germanium sealing window and a temperature control hood form a sealed temperature control cavity; and the middle infrared cameras, the infrared polarizer, the wire gating polarization device and the diaphragm are arranged in the temperature control cavity. When detection is carried out, the system of the infrared detecting device is calibrated; the image of the sea surface sun bright band is collected; and target recognition is finally realized after image processing. According to the invention, the image gray scale difference between the target and the surrounding sea area is improved; equal gray-scale massive sea area appearing in the bright band sea area is reduced; and the target recognition ability in the sea surface sun bright band is improved.

An infrared detector comprises: a reflection portion transmitting far- and middle-infrared rays and reflecting near-infrared and visible rays; a photo-current generating portion having a quantum well structure in which electrons are excited by the far- and middle-infrared rays having passed through the reflection portion so as to generate photo-current; a light emitting portion having a quantum well structure into which electrons of the photo-current generated by the photo-current generating portion are injected and the electrons thus injected thereinto are recombined with holes, thus emitting near-infrared and visible rays; and a photo-detecting portion detecting the near-infrared and visible rays emitted from the light emitting portion, and detecting the near-infrared and visible rays emitted from the light emitting portion and reflected by the reflection portion. The reflection portion, the photo-current generating portion, and the light emitting portion are made of group III-V compound semiconductors layered on a semiconductor substrate.

The invention discloses an electrooptical modulator based on graphene. The electrooptical modulator comprises a substrate, a magnetic resonance plasmon metasurface and a single-layer graphene sheet. By means of the electrooptical modulator, the Fermi level of the single-layer graphene sheet can be changed so that the transmissivity of middle infrared light which transmits through the electrooptical modulator can be changed, and it is guaranteed that the position of the transmission peak on the spectrum cannot be changed.

The invention discloses a nano structure yttrium aluminum garnet-based transparent ceramic material, a preparation method and an application thereof. A transparent ceramic made of the material is of anano composite-phase structure consisting of YAG and Al2O3, and in addition the grain sizes of a YAG crystal phase and an Al2O3 crystal phase are both smaller than 100nm. A YAG-based transparent ceramic is prepared from an amorphous block glass precursor through thermal treatment, in the thermal treatment process, a part of aluminum dioxide in the block glass precursor is reacted with yttrium oxide, then the YAG crystal phase is generated, and the generated YAG crystal phase and the residual aluminum oxide crystal phase form a composite phase nano structure. The YAG transparent ceramic material has hardness and elastic modus comparable to or even superior to those of a YAG single crystal, is optically transparent between visible light and middle-infrared bands, has excellent photoluminescence properties after light activated ion doping, and has wide application prospects in fields such as laser, fluorescence, flicking light emission, optical lenses, artware and jewelries.

The invention provides an intermediate infrared double-frequency-band metamaterial absorber based on a double-L structure and belongs to the field of metamaterials. The absorber comprises a dielectric substrate with double sides covered with metal, wherein the back side of the dielectric substrate is provided with a metal film layer, and the front side of the dielectric substrate is provided with etched double-L metal array patterns consisting of an upper L-shaped pattern and a lower L-shaped pattern. Each L-shaped pattern is formed by connecting a horizontal arm and a vertical arm which are perpendicular to each other, a diagonal line formed by the tail ends of two arms of the upper L-shaped pattern is perpendicular to a diagonal line formed by the tail ends of two arms of the lower L-shaped pattern, and the vertical arms of the L-shaped patterns are arranged on the same line. By reasonably designing the geometric dimension and a lattice period of the L-shaped structure, electromagnetic waves incoming onto the surface of a metamaterial can be completely absorbed. The metamaterial absorber has the advantages of being simple in structure and large in incidence angle, performing absorption through an intermediate infrared band and being provided with two absorption peaks and has wide application prospect in the fields of electromagnetic energy absorption, spectrum detection and the like.