554 results about "Mid infrared" patented technology

The invention relates to the technical field of refrigeration material preparation, in particular to an efficient passive radiation refrigeration material suitable for a sub-super environment and a preparation method and application of the efficient passive radiation refrigeration material. The method comprises the following steps: uniformly mixing thermoplastic polyurethane, sunlight high-reflection inorganic particles and a phase change material in a solvent; after a chemical foaming agent is added, the obtained suspension liquid is heated and foamed in a confinement mold, and wet gel is formed; and finally, carrying out freeze drying treatment to obtain the composite porous aerogel. The prepared material has a micro-nano porous skeleton formed by TPU, and inorganic particles and PCM are uniformly dispersed in the skeleton wall. Through component cooperation and a special porous structure, the material has extremely high sunlight reflectivity and mid-infrared emissivity, self-adaptive temperature regulation and control are achieved through PCM phase change, the problem that refrigeration of a traditional material fails in the sub-environment such as the vertical surface is effectively solved, and efficient sub-super-environment heat management is achieved.

The invention discloses an intermediate infrared polarization spectrum imaging method and device. The method comprises the following steps: carrying out joint coding on an intermediate infrared light beam carrying to-be-measured target space, spectrum and polarization information by adopting an intermediate infrared polarization spectrum modulator consisting of metasurface units which are arranged in an array and have non-correlation response characteristics; projecting the coding light field to a two-dimensional detector array to generate a two-dimensional coding image under single exposure; and decoding the two-dimensional coding image through a reconstruction unit so as to reconstruct and obtain a space-spectrum-polarization four-dimensional data cube of the target to be measured. The problem that polarization information cannot be rapidly obtained in the prior art is solved, target full information can be obtained under single exposure, and the system has the advantages of being high in imaging speed, simple in structure, easy to miniaturize and the like.

The invention discloses a rolled piece temperature control system based on a steel rolling process, which relates to the technical field of steel rolling and comprises a detection module, a control module, an execution module and a cooling module, the detection module comprises infrared thermometer arrays, an ultrasonic thickness gauge, an electromagnetic flowmeter, a pressure transmitter and a thermal resistance thermometer, and the infrared thermometer arrays are used for being arranged in front of and behind a cooling section and respectively collecting initial temperatures before entering a cooling system. Through the self-adaptive PID algorithm, the finite difference heat conduction model and the Smith pre-estimation compensation strategy are combined, the problem of control delay caused by the large lag characteristic in the cooling process is solved, control parameters can be dynamically adjusted according to the rolling speed, the steel grade characteristic and the like, temperature adjustment better fits the actual working condition, and the control precision is improved. The phenomenon of supercooling or insufficient cooling in a traditional control mode is fundamentally avoided, and the uniformity and stability of the performance of rolled pieces are guaranteed.

The invention relates to the technical field of component analysis, in particular to an intermediate infrared spectrometer sensor verification system which comprises the following steps: acquiring spatial distribution information of a target sample through an automatic sampling module, and generating a corresponding first feature group based on the spatial distribution information; adjusting an emission wave band and a modulation strategy corresponding to a mid-infrared light source, converting mid-infrared photons into visible light signals, and generating a corresponding second feature group; performing down-sampling processing on the original spectral data to generate a corresponding third feature group; inputting the sparse spectral coefficient into a pre-trained deep learning reconstruction model, and dynamically correcting the reconstruction process in combination with an environment temperature compensation parameter to generate reconstructed spectral data corresponding to high resolution; and analyzing the reconstructed spectrum data, matching a preset substance spectrum database, extracting a characteristic absorption peak position and an intensity ratio of the target substance, and generating a corresponding final analysis result. According to the invention, the intelligence of the sensor verification system can be improved.

The invention discloses a high-tolerance synchronous dual-band pulse laser, and relates to the field of lasers, and the laser comprises a first resonant cavity and a second resonant cavity; the first resonant cavity comprises a first pumping source and an optical annular cavity formed by sequentially connecting a first wavelength division multiplexer, a first thulium-doped optical fiber, a first optical coupler, a first isolator, a second wavelength division multiplexer, a high-nonlinearity saturable absorber, a third wavelength division multiplexer and a first polarization controller; the second resonant cavity comprises a second pumping source and an optical annular cavity which is formed by sequentially connecting a fifth wavelength division multiplexer, a second erbium-doped fiber, a second optical coupler, a second wavelength division multiplexer, a high-nonlinearity saturable absorber, a third wavelength division multiplexer, an electric control adjustable delay line, a fourth wavelength division multiplexer, a second polarization controller and a second isolator, and the fifth wavelength division multiplexer, the second erbium-doped fiber, the second optical coupler, the high-nonlinearity saturable absorber, the third wavelength division multiplexer, the electric control adjustable delay line, the fourth wavelength division multiplexer, the second polarization controller and the second isolator; and the first optical coupler and the second optical coupler respectively output synchronization pulses in the wave bands of 2 microns and 1.5 microns. The device is compact in structure, low in manufacturing cost, convenient to operate and capable of covering the mid-infrared band of 2 microns.

The invention provides a holmium and ytterbium co-doped mid-infrared microsphere Raman laser and a preparation method thereof, and relates to the technical field of laser preparation, the holmium and ytterbium co-doped mid-infrared microsphere Raman laser comprises an infrared transmission optical fiber, a pump light source, holmium and ytterbium co-doped tellurate glass microspheres and passive tellurate glass microspheres, pump light emitted by the pump light source is guided to a conical region through the infrared transmission optical fiber, and the holmium and ytterbium co-doped tellurate glass microspheres and the passive tellurate glass microspheres are arranged in the conical region; sequentially carrying out optical coupling with holmium and ytterbium co-doped tellurate glass microspheres and passive tellurate glass microspheres; in the holmium and ytterbium co-doped tellurate glass microspheres, the doping amount of the holmium element is 0.3%, and the doping amount of the ytterbium element is 0.45% according to the mass percentage. Compared with the prior art, through the cascade structure of the holmium-ytterbium co-doped microspheres and the passive microspheres, three-step wavelength conversion of pump light-rare earth ion lasing-Raman frequency shift is realized in a single system for the first time, and the wavelength limitation that a traditional single microsphere depends on a rare earth ion fixed energy level is broken through.

The present application relates to a kind of on-chip photo-thermal gas sensor and on-chip photo-thermal gas sensor assembly, the refractive index of the upper waveguide material layer of sensor ridge waveguide layer is greater than the refractive index of lower waveguide material layer, can support TM mode pump light and TE mode probe light simultaneously. That is, both high absorption of pump light and weak influence of probe light on the gas to be measured are considered, and the detection accuracy of the gas is improved. Moreover, a simpler waveguide structure is used, and the waveguide preparation process is simple, and the waveguide loss is relatively low. Compared with the photo-thermal interference method in optical fiber sensing, the interaction between pump light and the gas to be measured is greatly improved, the length of the detection waveguide is greatly shortened while ensuring high sensitivity, and the device size can be reduced to micrometer level. In addition, the waveguide structure of the on-chip photo-thermal gas sensor disclosed in the present application is prepared from chalcogenide glass, which has more obvious advantages for gas detection in the mid-infrared waveband.

The invention provides a mid-infrared high-speed waveguide type modulator capable of being integrated on a chip and a design method, and belongs to the technical field of semiconductor optoelectronic devices, aiming at solving the problem that an existing mid-infrared modulator cannot consider high speed, low loss and on-chip integration compatibility at the same time. The modulator comprises an InP substrate, an epitaxial structure growing on the InP substrate and a traveling wave electrode structure prepared on the epitaxial structure. The epitaxial structure sequentially comprises an InP contact layer, an InAlAs lower light limiting layer, an InP / InGaAs lower waveguide layer, an asymmetric multi-quantum well structure, an InP / InGaAs upper waveguide layer, an InAlAs upper light limiting layer and a Cap layer from bottom to top. The design method comprises the steps of selecting a compatible material system, designing an asymmetric multi-quantum well structure, processing an epitaxial structure into a ridge waveguide structure, designing a traveling wave electrode and carrying out device characterization testing. The method is suitable for design and preparation of the middle-infrared band high-speed light modulation device.

The invention relates to the field of mid-infrared focal plane array spectral imagers, and discloses a mid-infrared focal plane array spectral imager and a spectral imaging method thereof.The mid-infrared focal plane array spectral imager comprises a focal plane array, the focal plane array comprises a plurality of pixels, and the pixels are arranged in the focal plane array. Wherein each pixel comprises a PIN heterojunction and a CdS layer arranged at the interface of the PIN heterojunction, and the imaging method comprises the following steps: carrying out spectrum training on each pixel in a focal plane array of the mid-infrared focal plane array spectrum imager, and establishing an independent spectrum model for each pixel so as to form a spectrum model cube; performing spectrum reconstruction on each pixel in the focal plane array based on the spectrum model cube; and combining the reconstructed spectrums of all the pixel points to generate a spectral imaging result. The invention solves the problem that the prior art lacks a spectral imager for the mid-infrared focal plane, and has the characteristics of low cost, chip and simple process.

A first pumping source and a second pumping source are combined through a pumping beam combiner and are coupled into an erbium-doped fluoride fiber and a high-reflectivity fiber bragg grating, and the erbium-doped fluoride fiber and a low-reflectivity fiber bragg grating form a laser resonant cavity. The intermediate infrared laser is output through the low-reflectivity fiber bragg grating, the cladding light filter and the optical fiber end cap; the high-reflectivity fiber bragg grating and the low-reflectivity fiber bragg grating have the same grating period, the fourth-order harmonic reflection wavelength of the grating is located in the emission spectrum range of transition of erbium ions from the 4F9 / 2 energy level to the 4I9 / 2 energy level, and the fifth-order harmonic reflection wavelength of the grating is located in the emission spectrum range of transition of erbium ions from the 4I11 / 2 energy level to the 4I13 / 2 energy level; by adjusting the power of the first pumping source and the second pumping source, the net gain of laser transitions from the 4F9 / 2 energy level to the 4I9 / 2 energy level and transitions from the 4I11 / 2 energy level to the 4I13 / 2 energy level is regulated and controlled, and switching of laser working wavelengths is achieved.

The invention discloses a high-reflection magnesium phosphate / aluminum phosphate radiation refrigeration material and a preparation method thereof, and relates to the technical field of radiation refrigeration materials. The preparation method of the high-reflection magnesium phosphate / aluminum phosphate radiation refrigeration material comprises the following steps: (1) mixing aluminum sec-butoxide and deionized water to prepare a solution A; mgCl2. 6H2O and deionized water are mixed to prepare a solution B; mixing the solution A and the solution B to obtain a solution C; (2) adding 3-sulfopropyl tetradecyl dimethyl betaine into the solution C to obtain a solution D; (3) stirring sodium pyrophosphate and deionized water into a solution E; mixing the solution E and the solution D to obtain a solution F; and (4) reacting the solution F at 150-180 DEG C, cooling, freeze-drying and grinding to obtain H, heating H to 300-400 DEG C at the rate of 3-4 DEG C / min, then heating H to 800-1300 DEG C at the rate of 7-10 DEG C / min, and keeping the temperature for 1-3 hours to obtain the product. The material prepared by the invention has excellent sunlight reflectivity and excellent mid-infrared emissivity, and shows excellent performance in the field of radiation refrigeration.

The invention discloses a multi-field adjustable high-speed electro-optical logic device and an implementation method thereof. According to the invention, light output is electrically controlled, and two logic functions are realized on the same device; the input laser wavelength comprises a main communication wave band, and a PL output signal is matched with an atmosphere window, so that information transmission is facilitated; the working switch ratio of the logic device is greater than two orders of magnitude, static power consumption is reduced, and the anti-interference capability and the accuracy of logic operation are improved; the response time is short, the key effect on improving the operation speed is achieved, and high-frequency work is supported; a PL output signal is sensitive to polarization, so that the degree of freedom of transmitted information is higher; the method is applied to the fields of encryption transmission of efficient optical communication, logic operation in an all-optical chip and the like; not only is the working switch ratio as high as 2 orders of magnitude shown, but also the nanosecond-order response speed can be maintained, so that the method has great potential to solve the problems in the science and technology fields such as encryption transmission of efficient mid-infrared light communication.

The invention discloses an ocular surface illumination treatment device and method, and belongs to the technical field of ophthalmology medical equipment and treatment. The device comprises an infrared camera module, a computer terminal analysis control module, an optical power detection module, a mechanical adjustment module, a safety switch module and an illumination module. Wherein the infrared camera module comprises an infrared CCD (Charge Coupled Device) camera and a near-infrared light source which are arranged at a preset included angle and can collect eye images and transmit the eye images to the computer terminal, and the highest recording speed of the infrared camera module is not lower than 200 frames per second; and the computer terminal analyzes the image to obtain pupil positions, diameters and distances, and adjusts relative positions of a shielding device and a lens group in the light path of the illumination module, the axis of the light path and the distance between left and right lens cones, so that the central dark area of the annular light spot is matched and overlapped with the pupil. Eye images are collected and processed firstly, then light spots and the lens cone are adjusted, finally phototherapy and real-time monitoring are carried out, light can be prevented from entering the fundus, the treatment safety is improved, and the device is suitable for ocular surface diseases such as xerophthalmia.

Disclosed is a photodetector, preferably a mid-infrared photodetector, composition comprising semiconductor particles (101) comprising a band gap of less than 1.5 eV, preferably less than 1eV, and metal nanoparticles (103), wherein the semiconductor particles are interconnected via electrically conducting bridges (102) comprising the metal nanoparticles thereby forming an electrically conductive network. A photodetector comprising the composition and a method of manufacturing the composition are also described.

A mulch may include a hydrophilic cellulose layer and hydrophobic top layer formed on the cellulose layer. The cellulose layer and top layer together may form a wettability gradient which facilitates directional water transport from the hydrophobic top layer to the hydrophilic cellulose layer. A surface of the hydrophobic top layer is optically opaque and exhibits a solar reflectance of 85% to 98% in response to incident light the 250-2500 nm wavelength range. The mulch provides a mid-infrared emissivity of 0.85 to 0.97 in the 8-13 μm range. The solar reflectance and mid-infrared emissivity decrease underlying soil temperature by at least 2° C. compared to uncovered soil under equivalent solar conditions.

The invention discloses an ultra-wideband heterogeneous five-core anti-resonance optical fiber for transmission from ultraviolet to intermediate infrared, and belongs to the technical field of optical fiber communication. The heterogeneous five-core anti-resonance optical fiber sequentially comprises a perfect matching layer, an outer cladding layer, a first light guide unit, a second light guide unit, a third light guide unit, a fourth light guide unit and a fifth light guide unit from outside to inside along the fiber diameter, wherein the first light guide unit, the second light guide unit, the third light guide unit, the fourth light guide unit and the fifth light guide unit are arranged in the outer cladding layer. A plurality of nesting tube assemblies and gap tube assemblies with the same or different structures are arranged in each light guide unit in the circumferential direction at equal intervals, and a central air fiber core area, a left upper air fiber core area, a right lower air fiber core area, a right upper air fiber core area and a left lower air fiber core area are defined by the assemblies and work at the wave bands of 0.15-2.0 m, 2.0-3.0 m, 3.0-4.0 m, 4.0-6.0 m and 6.0-7.0 m correspondingly. And all the components show extremely low restrictive loss, dispersion close to zero and a relatively low nonlinear coefficient.

An image processing method and an image processing apparatus therefor, and a computer-readable storage medium. The image processing method comprises: performing N-layer pyramid decomposition on a visible light original image to obtain a visible light base layer; performing N-layer pyramid decomposition on an infrared original image to obtain an infrared base layer; on the basis of an infrared pixel weighting curve and a visible light pixel weighting curve, performing image fusion on the visible light base layer and the infrared base layer to obtain a base layer fused image. The present application performs N-layer pyramid decomposition on a visible light original image to obtain a visible light base layer, performs N-layer pyramid decomposition on an infrared original image to obtain an infrared base layer, and fuses the visible light base layer and the infrared base layer on the basis of an infrared pixel weighting curve and a visible light pixel weighting curve, such that display weightings of different pixel values of the infrared base layer in the base layer fused image vary, thus effectively improving the degree of prominence of infrared targets after fusion.

The invention provides a high-power external cavity tunable quantum cascade laser output module. The high-power external cavity tunable quantum cascade laser output module comprises a first lens, a first half-wave plate and a first mid-infrared grid polaroid which are sequentially arranged along a light path of a first laser; a second lens, a second half-wave plate, a second mid-infrared grid polarizer and a third half-wave plate are sequentially arranged along the light path of the second laser; emergent light of the first mid-infrared grid polaroid and the third half-wave plate is converged on different surfaces of the third mid-infrared grid polaroid, the first blazed grating is arranged on a reflection light path of the first mid-infrared grid polaroid, and the second blazed grating is arranged on a reflection light path of the second mid-infrared grid polaroid. According to the invention, the problems of wavelength locking and low polarization beam combination efficiency caused by insufficient polarization state of the quantum cascade laser can be effectively solved, narrow linewidth output and wavelength tuning of the quantum cascade laser can be realized, and even high-power dual-wavelength tunable output can be realized through polarization beam combination structure expansion.

The invention relates to the technical field of coatings, in particular to a double-layer super-hydrophobic passive daytime radiation cooling coating and application thereof. The super-hydrophobic passive daytime radiation cooling coating is developed through a two-step spraying process. And the bottom layer is formed by combining a high refractive index TiO / Al2O3 composite material and modified polydimethylsiloxane. The top layer employs high band gap SiO to mitigate ultraviolet absorption and combines unmodified PDMS to ensure high thermal emissivity and low surface energy. By accurately controlling the particle size distribution and concentration gradient between the two layers of structures, the optimized SPDRC coating shows excellent optical performance, the solar reflectivity is 93.2%, and the mid-infrared thermal emissivity is 95.4%. Under the direct irradiation of the sun, the temperature reduction of 10 DEG C is obviously lower than that of the environment, and the radiation cooling power of 125 Wm <-2 > is realized. In addition, the coating has a water contact angle of 155 degrees, has strong super-hydrophobicity, can ensure excellent self-cleaning performance and long-term durability, and is suitable for actual outdoor application of building cooling.

The invention provides an infrared polarization beam splitter in a bow-tie-type dual-core photonic crystal fiber plated with a gold film, and the beam splitter comprises a substrate which is made of pure silicon; the first circular air hole is formed in the center of the substrate, and the inner side of the first circular air hole is plated with a gold film; the two fiber cores are symmetrically arranged on the two sides of the first circular air hole; the two elliptical air holes are symmetrically formed in the outer sides of the two fiber cores; the 38 second circular air holes surround the first circular air hole, the two fiber cores and the two elliptical air holes to form a bow tie type arrangement structure; the 72 third circular air holes surround the second circular air holes to form a bow tie type arrangement structure; the aperture of the third circular air hole is larger than that of the second circular air hole; the distance between any two adjacent third circular air holes is equal to the distance between any two adjacent second circular air holes.

An apparatus for non-contacting measurement of the temperatures of rotatable elements, such as prism elements of a Risley prism assembly, includes IR emissive patches applied to radially outward facing surfaces of the rotatable elements, reflective surfaces configured to axially reflect black body IR radiation emitted by the patches, IR sensors located behind the rotatable elements and configured to sense the reflected black body radiation, and a controller configured to receive data from the IR sensors and determine therefrom the temperatures of the rotatable elements. In embodiments, none of the IR sensors extends radially beyond a housing of the rotatable elements, and in some embodiments the IR sensors do not extend radially beyond a diameter of a largest of the rotatable elements. The apparatus can further include patches oriented axially rearward and associated IR sensors.

The invention relates to the technical field of spectral measurement, in particular to a quantum correlation enhanced optical comb spectrum device and method, and the method comprises the steps: processing pump light and seed light to obtain idler frequency light and intrinsic light with quantum correlation; performing time domain matching adjustment on the idle frequency light, and reflecting the idle frequency light after the time domain matching adjustment to obtain a time-matched quantum correlation light beam; combining the intrinsic light and a continuous laser to obtain a first combined light; the mid-infrared light comb generates mid-infrared light carrying gas information after penetrating through the sample cell containing the gas to be detected; the light after the first beam combination and the mid-infrared light carrying the gas information are combined to obtain light after the second beam combination, frequency conversion processing is carried out, and then a near-infrared light comb is output; and processing the quantum correlation light beam and the near-infrared light comb which are matched in time, and outputting a double-light comb signal. Through combination of a quantum correlation mechanism and a frequency conversion technology, the intermediate infrared spectrum detection signal-to-noise ratio is remarkably improved, and high-sensitivity and high-speed parallel quantum enhanced spectrum is realized.

The invention discloses an ultra-wideband high-efficiency absorber in the technical fields of optics, material science and energy, which takes silicon dioxide (SiO2) as a substrate, and a titanium (Ti) nano rectangular body array is arranged above the substrate; a silicon nitride (Si3N4) regular hexagonal prism array is constructed on the top of the titanium layer, six cylindrical holes are etched in the midpoint of each vertex of a regular hexagon on the bottom surface of the titanium layer, and magnesium fluoride (MgF2) is filled in the cylindrical holes to form magnesium fluoride nano cylinders; a chromium (Cr) ring and a silicon nitride ring are sequentially superposed at the top end of the hexagonal prism and are tangentially matched with the hexagon on the top surface of the hexagonal prism. According to the UWB-HEA, the incident wavelength ranges from 400 nm to 4000 nm, the designed efficient absorption range (namely absorption band) of the UWB-HEA covers from near-infrared 855 nm to mid-infrared 3540 nm, about 2685 nm, the average absorption rate of 96.67% is achieved under TM waves, and the highest absorption rate is 99.66%; the average absorption rate of 96.44% is achieved under TE waves, the highest absorption rate is 99.72%, and the absorption rate is almost unrelated to polarization. In order to reduce radiation energy loss of an object, an ideal solar heat absorber needs to realize efficient light absorption in a wide wave band range.

The invention relates to the field and discloses application of terahertz waves or intermediate infrared in preparation of adoptive T lymphocytes. The Terahertz wave or mid-infrared modulation technology is utilized to specifically regulate and control the functions of the T cells in a flowing irradiation mode, and the functions of the T cells from different sources are enhanced under the conditions that no medicine is used and no exogenous gene is introduced. Terahertz wave or mid-infrared stimulation is applied to the T cells in a flowing irradiation mode, specific terahertz wave or mid-infrared frequency for remarkably enhancing the functions of the T cells is determined in a frequency screening mode, and after the optimal irradiation frequency is determined, the T cells with the most remarkable function improvement are further input back into a donor. The T cells stimulated by terahertz waves or mid-infrared rays can play a powerful immune function in a tumor microenvironment so as to inhibit further development of tumors.

The invention relates to an intelligent temperature-regulating radiation refrigeration fiber as well as a preparation method and application thereof, i.e., based on the difference of emission performance of polyurethane in a mid-infrared band (8-13 microns) under different temperature conditions, the intelligent temperature-regulating radiation refrigeration fiber is prepared through synthesis of room-temperature reversible solid-solid phase change polyurethane, surface grafting dispersion modification of nanoparticles, polyurethane / nanoparticle dry spinning processing and the like. The invention discloses a method for preparing fibers and textiles with high and medium infrared band emissivity (relatively strong radiation refrigeration effect) under a high-temperature condition and low and medium infrared band emissivity (relatively weak radiation refrigeration effect) under a low-temperature condition. According to the method, the radiation refrigeration effect of the textile can be intelligently regulated and controlled based on the phase state structure change of the fiber material, and then the thermal comfort requirement of clothes under the high-temperature and low-temperature conditions is met. In addition, the method is simple in process and remarkable in effect, and overcomes the defects in the prior art.

The invention discloses glass with spectral selectivity, a window and an optical design method, and belongs to the technical field of glass. The glass with spectral selectivity comprises a radiation cooling layer, a photon structure regulation and control layer and a substrate which are sequentially arranged from the outer side to the inner side, the outer side is a heat energy incidence side, and the inner side is a side needing temperature control; the mid-infrared light emissivity of the radiation cooling layer is greater than or equal to 90%; the photonic structure regulation and control layer is designed based on an effective medium theory and optical topology transformation, and meets the following optical properties: the reflectivity to an ultraviolet band is greater than or equal to 80%, the transmittance to a visible light band is greater than or equal to 75%, and the reflectivity to a near-infrared band is greater than or equal to 80%. Independent and accurate management of ultraviolet, visible light and near-infrared bands can be achieved, meanwhile, the radiation cooling layer conducts active heat dissipation, and indoor temperature control balance is maintained.

According to the mid-infrared multispectral integrated imaging device system and method based on the metasurface, superatom phase distribution is designed through dispersion engineering, accurate matching is conducted through a particle swarm optimization algorithm, incident light of different wavelengths generates transverse dispersion on a focal plane, full-wave-band spectral imaging can be completed through single exposure, and a mechanical scanning device is not needed. The quadruple rotational symmetry structure of the metasurface ensures the consistent response to TE / TM polarized light, and significantly improves the adaptability of the system in a complex polarization environment. The average energy utilization rate of the metasurface exceeds 50%, the highest isolation degree of each pixel is 48, and the metasurface has the characteristics of high signal-to-noise ratio and low crosstalk. Compared with a traditional spectral imaging device, the spectral imaging device has the advantages of being high in speed, high in energy utilization rate, small in size, low in crosstalk and the like, is suitable for application scenes such as medical endoscopy, industrial online detection and unmanned aerial vehicle environment monitoring which have high requirements for real-time performance and portability, and provides an innovative solution for achieving a miniaturized spectral imaging system.

An ultra wide band (UWB) optical absorber based on multilayer transition metal layers is provided, and a working band thereof includes a visible-near infrared band or a mid-infrared band; a high reflecting metal film layer, a transition metal film layer and a dielectric film layer are sequentially stacked on a substrate; the high reflecting metal film layer, multilayer transition metal film layers and the dielectric film layer form a planar multilayer structure. The high reflecting metal film layer is used to prevent light transmission, and the combination of the multilayer transition metal film layers and the dielectric film layer reduces the reflection, thus achieving the effect of efficient optical absorption in UWB. The optical absorber can achieve an average absorptivity of more than 92% in the visible-near infrared band of 400-2500 nm, and an average absorptivity of more than 80% in the mid-infrared band of 3-16 μm.

The invention discloses a thermal imaging technical method, device, equipment and medium, and relates to the field of thermal imaging temperature drift compensation correction, and the method comprises the steps: collecting the original temperature data of an infrared sensor in the thermal imaging equipment; preprocessing the original temperature data, and converting the preprocessed temperature data into a superposition state and an entanglement state of quantum; according to the loss function and gradient of the quantum neural network, constructing a temperature drift compensation model based on the quantum neural network; and inputting the converted superposition state and entanglement state of the quantum into a temperature drift compensation model, and outputting data of the thermal imaging equipment after temperature drift compensation correction during operation. Therefore, quantum calculation is introduced into a dynamic temperature drift compensation and correction algorithm of the thermal imaging equipment, the precision of a temperature drift compensation model is enhanced by using the parallel calculation capability of a quantum superposition state and an entangled state, and the reaction rate of the thermal imaging equipment in a high-temperature environment is efficiently improved; and the problems of operation blockage, image distortion, abnormal shutdown and the like caused by excessive heating of the equipment are solved.

The invention discloses a continuous domain bound state sensor based on a composite prism all-dielectric metasurface, which is composed of periodically arranged unit structures, and each unit structure comprises a barium fluoride substrate layer and a group of silicon structure layers stacked on the barium fluoride substrate layer; the silicon structure layer comprises two first composite prisms arranged along a main diagonal line and two second composite prisms arranged along an auxiliary diagonal line, and the main diagonal line and the auxiliary diagonal line are in a crossed state; the tips of the two first composite prisms and the tips of the two second composite prisms are arranged in opposite directions, and the first composite prisms and the second composite prisms are of asymmetric structures; when polarized light is vertically incident, the resonance response of the ring dipole is excited, and two Fano formants are formed; the sensor has ultrahigh sensitivity and quality factor in a middle-infrared band, and can be applied to gas sensing and detection of various components of blood.