196 results about "Long wave infrared" patented technology

The invention relates to the technical field of structural safety detection of steel structural members, in particular to a steel structural damage identification and repair method, system and device and a medium, and the method comprises the steps: obtaining a multi-source image data set and a standard corrosion test block database of a steel structural member through an unmanned aerial vehicle, the multi-source image data set comprises a polarized visible light image, a long-wave infrared temperature matrix and hyperspectral reflectivity data, and the standard corrosion test block database comprises spectral feature vectors of different corrosion grades and corresponding physical parameters; and carrying out sub-pixel level registration and feature extraction on the multi-source image data set. According to the method, the unmanned aerial vehicle synchronously carries the three cameras to carry out real-time multi-dimensional data acquisition, the problem of data splitting in traditional single-mode detection is solved, the multi-spectral data acquisition efficiency and the sub-millimeter level hidden damage identification precision are remarkably improved, and dynamic environment interference is inhibited in real time through an intelligent parameter inversion mechanism.

The invention relates to a dual-waveband medium-long wave infrared optical filter based on a germanium / zinc sulfide asymmetric film system and a preparation method of the dual-waveband medium-long wave infrared optical filter. The dual-waveband medium-long wave infrared optical filter comprises a front film system, a substrate and a back film system, the front film system and the back film system are formed by alternately overlapping germanium layers and zinc sulfide film layers; the average transmittance of the infrared optical filter in the wave band of 3800 nm to 4800 nm and the wave band of 8000 nm to 10000 nm is not lower than 91%. According to the two-waveband medium-long wave infrared optical filter disclosed by the invention, 3800 to 4800 nm amp is realized; according to the infrared filtering window, the light energy of medium waves and long waves of 8000-10000 nm is improved, the luminous flux of other wavebands is well inhibited, the technical problem of the infrared filtering window in some special infrared spectrum detection systems is solved, and a new scheme is provided for infrared application.

The invention belongs to the technical field of infrared optics, and discloses a long-wave infrared continuous zooming microscope lens. The lens is provided with two lenses, namely a first lens and a second lens which are sequentially and coaxially arranged between an object plane and an image plane; the first lens is a meniscus positive lens of which the convex surface faces the image side, and the second lens is a meniscus positive lens of which the convex surface faces the image side; the first lens and the second lens can move between an object plane and an image plane so as to carry out high and low magnification switching. The long-wave infrared continuous zooming microscope lens can realize multi-magnification switching, and also has the characteristics of small number of lenses, large target surface and clear imaging; the working wave band is 8-12 [mu] m, the magnification factor is 0.2-0.6, the F number of the image space is 1.5, the number of pixels is 1280 * 1024, and the size of the pixels is 12 [mu] m.

The invention provides a high-power wide-spectrum long-wave infrared femtosecond laser generation method, and relates to the technical field of infrared ultrafast laser. According to the method, the 1.5 [mu] m pumping BGSe crystal is adopted, compared with a traditional 1 [mu] m pumping BGSe crystal, the heat accumulation effect is greatly reduced, and the operation stability of the system is remarkably improved in combination with a water-cooling heat dissipation device. Through crystal cutting angle optimization and phase matching design, 10-16 [mu] m wide-spectrum long-wave infrared femtosecond laser output is achieved, the power reaches 100 mW, and the application requirements in the fields of molecular spectrum recognition, environment monitoring and the like are met.

The invention relates to a passive multiband sensing array system and a multi-target tracking method. The system comprises a multiband sensor group, an environment illumination sensor, a synchronization and control unit and a preprocessing unit, the multi-band sensor group comprises a visible light sensor, a near-infrared sensor and a long-wave infrared sensor which are integrated in a unified shell through a coaxial light path and do not comprise active emitters; the synchronization and control unit generates a synchronization signal and controls the multi-band sensor group and the environment illumination sensor to perform synchronous data acquisition; and the preprocessing unit receives the original image data, the environment illumination data and the synchronizing signal, outputs a structured multi-mode data packet and provides the structured multi-mode data packet to the multi-target tracking engine at the rear end, and the multi-target tracking engine outputs the tracking states of multiple targets. According to the invention, stable, continuous and high-precision tracking of a plurality of targets can be realized in a plurality of complex scenes, and the problems of poor environmental adaptability, dependence on active emission and insufficient robustness of the existing multi-target tracking scheme are effectively solved.

A hydrocarbon gas detection system including a longwave infrared camera, a spectral filter, and a computation unit. The spectral filter is disposed in the light path of the camera sensor. The spectral filter is made of a material selected from the group consisting of calcium fluoride, zinc sulfide, magnesium fluoride, and silicon. The computation unit is arranged to process image data of the longwave infrared camera for the hydrocarbon gas detection.

The invention provides a rainfall monitoring method and system based on unmanned aerial vehicle multi-mode noise reduction in the technical field of environment monitoring and unmanned aerial vehicle application, and the method comprises the steps: S1, collecting a visible light image and a long-wave infrared image through a multispectral vision module after an unmanned aerial vehicle takes off, and collecting a rainfall audio from an acoustic cabin through a microphone; s2, carrying out noise reduction processing on the visible light image, the long-wave infrared image and the rainfall audio; s3, extracting a raindrop size distribution histogram and a spatial density thermodynamic diagram based on the visible light image and the long-wave infrared image, and extracting acoustic MFCC features based on rainfall audio; s4, performing feature fusion operation based on the raindrop size distribution histogram, the visual density thermodynamic diagram and the acoustic MFCC features to obtain rainfall intensity; and S5, carrying out cumulant dynamic compensation based on the rainfall intensity to obtain the cumulative rainfall. The rainfall monitoring method has the advantages that the precision, robustness and practical level of rainfall monitoring are greatly improved.

The invention discloses a probabilistic thermal runaway early warning method and system based on a multi-modal three-dimensional thermal field, and relates to the technical field of energy storage safety monitoring, and the early warning method comprises the specific steps: S100, multi-modal data collection; s200, carrying out time alignment processing; s300, feature fusion extraction is carried out; s400, reconstructing a three-dimensional temperature field; s500, calculating a thermal runaway probability; according to the method, multi-modal data of RGB-D, long-wave infrared and gas sensors are fused, space-time synchronization is realized in combination with a soft Kalman alignment algorithm, the limitation of single physical quantity monitoring is broken through, cross-modal correlation features are extracted by adopting a pyramid cross attention adversarial network, and the multi-modal data of the RGB-D, the long-wave infrared and the gas sensors are subjected to hierarchical linkage response. The generated multi-scale feature tensor can accurately describe the spatio-temporal evolution law of a thermal runaway precursor, after lightweight neural radiation field voxel reconstruction, millimeter-level dynamic updating of a three-dimensional temperature field is realized, the generation and diffusion process of local hot spots in an energy storage cabin can be captured in real time, and a high-fidelity thermal field portrait is provided for early risk identification.

The invention discloses an intelligent monitoring and early warning warehouse for tea storage, and relates to the technical field of agricultural product storage monitoring and intelligent early warning. An acoustic respiration sensing array, a quantum dot gas mapping film and optical excitation imaging, long-wave infrared polarization insect trace detection, and an edge calculation and actuator cluster are integrated in the warehouse body; a limited scanning sector is triggered by acoustics first sense, a VOC / ammonia concentration heat map and a polarization disturbance heat map are obtained, graded early warning is output through time-space fusion consistency scoring, and low-energy-consumption zoning intervention is achieved through model prediction control cooperation dehumidification, air supply, cold plasma and a zoning air door. In cooperation with reference self-correction, channel health detection and fault-tolerant synchronization, a monitoring-decision-regulation-re-monitoring closed loop is formed, and mildew / insect pest early warning and traceable management are achieved under the condition that packaging is not damaged.

The invention discloses an energy-saving dimming assembly and a manufacturing method, and relates to the technical field of building energy-saving facilities, and the energy-saving dimming assembly is sequentially provided with a first transparent layer, a second transparent layer, a third transparent layer and a fourth transparent layer from outside to inside, the temperature response functional layer comprises a mixture of at least two thermochromic high polymer materials and is configured to realize adjustment of light transmittance in a preset temperature interval; the second transparent layer is used for supporting the temperature response functional layer; and an optical regulation and control layer configured to have a low-radiation characteristic in a long-wave infrared region. According to the invention, the transmittance of visible light and infrared light of the window can be changed along with the change of temperature at 20-38 DEG C. Meanwhile, programmed adjustment of the corresponding temperature response interval can be achieved through temperature change; and the gradual change of the transmittance of visible light and infrared light can be regulated and controlled in a programmed manner through the temperature change, so that the effects of regulating the indoor brightness and temperature and protecting the visual comfort of a user are realized, and the aim of saving energy is fulfilled.

The invention relates to a broadband continuous testing device and method for diffraction efficiency of a medium-long wave infrared grating. The device comprises a broadband light source, a medium-long wave infrared monochromator, a collimation system, a polarization selection system, a broadband spectrum beam splitting system, a signal enhancement detection system, a sample clamping and multi-dimensional moving system and an automatic control system. According to the testing method, the absolute diffraction efficiency of the grating is tested through double optical paths, measurement errors caused by fluctuation of a light source can be avoided, the measurement errors are further reduced by deducting environmental noise and improving the signal-to-noise ratio through a signal enhancement detection system, an automatic control system is added, and continuous scanning testing in a specified wave band is achieved. The test speed is improved. By means of the device and the method, automatic and rapid measurement of the diffraction efficiency of the medium-long wave echelette grating under the conditions of at least 2.5-14 micron broadband, different wavelengths, any incident angle and dual polarization states can be achieved.

The invention discloses a sulfur hexafluoride leakage detection method based on cooperation of long-wave infrared and thermal infrared spectrums, the sulfur hexafluoride leakage detection method is applied to a sulfur hexafluoride leakage detection device, and the sulfur hexafluoride leakage detection method comprises the following steps: carrying out calibration and parameter configuration on the sulfur hexafluoride leakage detection device; long-wave infrared spectrum and thermal infrared temperature field data are synchronously collected, preprocessing and time-space matching are carried out on the long-wave infrared spectrum and the thermal infrared temperature field data, leakage identification parameters are obtained, the thermal infrared temperature field data are temperature values of pixel points of a temperature field image, parameter calculation and risk early warning are carried out on the leakage identification parameters, and the leakage identification result is obtained. And obtaining a detection report. According to the invention, the sensitivity and accuracy of sulfur hexafluoride leakage detection can be improved.

This invention discloses a method for fabricating a highly sensitive long-wavelength infrared superconducting single-photon detector. It fully utilizes and amplifies the acoustic mismatch effect between the superconducting thin film and the substrate to achieve phonon localization enhancement on the superconducting nanowires. The effect of this innovative design is to increase the energy utilization rate of long-wavelength infrared photons on the superconducting nanowires, thereby improving the response sensitivity of the superconducting nanowires to long-wavelength infrared photon signals. Compared to existing designs that reduce the cross-sectional size of the superconducting nanowires, create holes beneath the nanowires, or increase the buffer layer, this invention is easier to implement and has higher scalability.

The photovoltaic module comprises a back contact cell main body and a light storage layer, the back contact cell main body comprises a back contact cell and a light conversion layer, the light conversion layer is arranged on the light receiving surface of the back contact cell, the light storage layer is connected with the back contact cell main body through a hinge structure, and the light storage layer can at least partially cover the light conversion layer. The light conversion layer can convert ultraviolet light and long-wave infrared light which are difficult to absorb by crystalline silicon into high-response visible light / near-infrared light, so that the effective incidence and absorption efficiency of front light is improved; the light storage layer is connected to the back contact cell main body in a hinge structure mode, the light storage layer can be opened through the hinge structure to effectively store sunlight under high illumination intensity, then the hinge structure at least partially covers the light conversion layer, the stored energy can drive the light conversion layer to release high-response photons, and the light conversion layer can release high-response photons. An effective light source is continuously provided for the back contact battery, and the daily effective power generation duration is prolonged.

The invention discloses a long-wave infrared detector based on electric field intensity distribution regulation and control and a preparation method, and relates to the technical field of semiconductors, the long-wave infrared detector comprises a substrate, a bottom contact layer, a hole barrier layer, an absorption layer, an electron barrier layer and a top contact layer which are sequentially arranged from bottom to top; wherein the bottom contact layer and the hole barrier layer adopt an InAs / GaSb / AlSb / GaSb superlattice structure; the absorption layer, the electron barrier layer and the top contact adopt an InAs / GaSb superlattice structure; the doping concentration of the absorption layer is greater than the doping concentration of the hole barrier layer and the electron barrier layer. The doping concentration of the absorption layer is set to be greater than that of the barrier layer, so that the width of a depletion region of the absorption layer is reduced, the depletion region deviates towards the barrier layer, the probability of SRH recombination is reduced, G-R current can be effectively inhibited, and the overall dark current level is reduced.

The application discloses a long-wave infrared dynamic space modulation device and method based on double coding apertures, and belongs to the technical field of optics. The application avoids the diffraction effect in the long-wave infrared space modulation process by selecting a large-size coding pixel coding aperture, adopts a double coding aperture space light modulation structure, separately performs space modulation on target light beams, and realizes coding effect superposition through beam combination, so that the space modulation resolution of the large-size coding pixel coding aperture is improved. On the premise of guaranteeing the space modulation resolution requirement and without increasing the coding aperture area, the diffraction effect in the long-wave infrared space modulation process is avoided by selecting the large-size coding pixel coding aperture. The application introduces the use of a displacement table, and the position of the moving coding template is transformed for multiple times within the single information acquisition time of the system, so that the effective coding area in the optical path is transformed, more coding superposition effects are generated, and the coding resolution and the coding gray scale are further improved.

This invention discloses an on-board calibration method for a long-wave infrared hyperspectral imager based on an adaptive composite model. The method includes: step 1, constructing a radiometric calibration dataset; step 2, constructing a physically constrained composite calibration model; step 3, adaptive global optimization of the model order and parameters; step 4, generating the blackbody radiometric calibration equation within the half-optical path; step 5, generating the external blackbody calibration equation within the full-optical path; step 6, establishing an internal-external blackbody conversion model; and step 7, on-board calibration of the long-wave infrared hyperspectral imager. By establishing the conversion relationship between the internal and external blackbody radiance across the entire dynamic range, the method effectively compensates for systematic deviations caused by thermal radiation and transmittance attenuation of the front optical path components. This ensures that during on-orbit operation, high-precision equivalent entrance pupil radiance can be obtained by relying on the on-board internal blackbody, solving the calibration reference drift problem caused by optical path differences.

The invention discloses a phase change material spectrum modulator based on Bayesian optimization and a long-wave infrared spectrum imaging system. According to the invention, a GSST and Sb2S3 double-layer circular nano-column structure is adopted as a main structural unit of the phase change material metasurface spectrum modulator, 25 different metasurface phase states are realized through light regulation and control of crystal fractions of the two materials, a plurality of spectrum modulation states are dynamically generated, and structural parameters of the phase change material metasurface spectrum modulator are automatically optimized through a Bayesian optimization algorithm. The imaging system comprises a spectrum modulation part and a calculation reconstruction part. The phase-change material metasurface spectrum modulator is directly integrated with an infrared detector pixel, so that single snapshot type information acquisition can be carried out while dynamic spectrum coding is realized; and the Transform encoder is used for carrying out end-to-end reconstruction on the modulation signal and outputting a high-precision space-spectrum three-dimensional data cube. The imaging system has the characteristics of micron size, multiple modulation states, high sampling efficiency, excellent reconstruction quality, high spectral resolution and the like.

The application relates to the field of lenses, in particular to a long-wave infrared electric focusing lens and an imaging method thereof. The long-wave infrared electric focusing lens comprises a main lens barrel, a front fixed lens group and a focusing lens group are sequentially arranged in the main lens barrel from left to right along the light incidence direction; the front fixed lens group comprises a positive lens A and a negative lens B which are sequentially arranged from left to right; the focusing lens group is provided with a positive lens C; and a connecting flange is arranged at the right end of the main lens barrel. The lens can realize 100mm fixed focus imaging, and the movement of the focusing group can realize searching and tracking of objects at different distances under different temperatures.

The invention provides a long-wave infrared laser reflector with a three-medium structure. The long-wave infrared laser reflector structurally comprises a substrate Sub, a transition layer B, a metal layer G, a medium film system C and an air layer A from bottom to top. The dielectric film system C is structurally characterized by being formed by alternately stacking one or more groups of materials with high, medium and low refractive indexes. The invention aims to realize high reflection of a long-wave infrared band. Through meticulous design, three kinds of materials with high, medium and low refractive indexes are reasonably distributed in the reflector. According to the strategy, the absorption of the reflector is effectively reduced by balancing the low absorption of the chalcogenide and the low refractive index of the fluoride, the temperature rise caused by heat absorption is remarkably reduced, and meanwhile, the reflectivity is improved. Therefore, the continuous laser damage threshold value of the reflecting mirror is greatly enhanced theoretically, and the reflecting mirror shows higher stability and tolerance when facing continuous laser irradiation.

This application provides a long-wave infrared light absorber based on phase change materials and MIM structures, belonging to the field of integrated photonic devices. The absorber includes a reflective layer, a double dielectric layer, and a metasurface layer. The metasurface layer allows light waves to enter the double dielectric layer through diffraction. The reflective layer and the metasurface layer form two reflective surfaces, allowing the light waves to undergo multiple reflections and achieve FP-cavity resonance. When the metasurface layer is crystalline and the polarization state of the light wave is not parallel to that of the metasurface layer, both the reflective layer and the metasurface layer possess metallic properties, enabling plasmon resonance when the frequency of the incident light wave matches the collective oscillation frequency of free electrons in the metal. Both FP-cavity resonance and plasmon resonance lead to the localization and enhancement of the electromagnetic field within the double dielectric layer, thereby enhancing the absorption of light waves. This application achieves reversible switching between two light wave absorption states by changing the phase state of the phase change material.

Provided herein are a sulfur copolymer derived from an elemental sulfur and a thiol monomer and a method for preparing the same. The sulfur copolymer is synthesized by a simple method, and can be widely used in cameras and lenses, or defense materials-related industries, by replacing expensive inorganic materials used in existing infrared lenses. In addition, by adjusting the content of one or more sulfur monomers or two or more sulfur monomers, not only mid-wave infrared transmission but also long-wave infrared transmittance can be maintained at a high level.

The invention belongs to the field of polarization optics and instruments, and discloses an infrared phase aberration eliminating phase retarder. The phase retarder is formed by attaching two rhombic prisms made of infrared optical materials, and one or more reflecting surfaces of the phase retarder are coated with metal reflecting films. Incident light beams are reflected for four times in the prism and then are emitted, and a specific amount of phase difference is introduced between a p component and an s component of light waves through total internal reflection and metal film reflection. The phase delayer can be designed to be used for near-infrared, medium-wave and long-wave infrared bands, has a certain phase aberration eliminating capability in the designed bands, can realize phase delay of 90 degrees, 180 degrees or other specific values, is parallel to an emergent light beam and an incident light beam, has no transverse movement of the light beam under the normal incidence condition, and is also easy to process and manufacture. The achromatic phase retarder can be used in various infrared polarization optical systems and is used for realizing conversion of infrared light wave polarization states.

1. The name of the design product: laser jamming device (long-wave infrared laser). 2. The use of the design product: for generating adjustable and stable long-wave laser energy, which can achieve stable laser jamming on the target, and can also verify the ability of the long-wave laser jamming device. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The invention belongs to the technical field of target characteristic measurement, and particularly relates to a light and small three-light hyperspectral imaging device for target characteristic measurement and a calibration method. The device comprises a visible near-infrared hyperspectral imager, a visible light camera, a long-wave infrared camera, a one-dimensional turntable and a tripod. The visible light camera and the long-wave infrared camera are integrated on the hyperspectral imager, and the three optical axes are consistent. The visible and near-infrared hyperspectral imager is installed on the one-dimensional rotary table to achieve push-scanning, and an internal light path of the visible and near-infrared hyperspectral imager passes through the front lens assembly, the folding-axis lens assembly, the slit assembly, the Dyson prism assembly, the rear lens assembly and the grating assembly, then is reflected by the grating assembly, sequentially passes through the rear lens assembly and the Dyson prism assembly to be folded and then is incident to an image plane of the detector assembly. The long-wave infrared camera obtains the target radiation temperature. The problems that an existing device is large in size, heavy in weight, low in integration level and poor in optical axis consistency are solved.

Optical elements including YbF3 layers with high transmittance in the LWIR spectral range are described. The YbF3 layer is produced by an ion-assisted deposition process under high voltage conditions. Dense, uniform, and nearly defect-free YbF3 layers are formed. The improved material quality of the YbF3 layers leads to low absorption in the LWIR spectral range, especially at wavelengths above 10.0 microns. The extinction coefficient of the YbF3 layers is less than 0.0400 at a wavelength of 13.5 microns.

A computer program product interacts with machine-readable mediums with instructions for automated launch detection and recognition. It captures a video of a specified region using detectors on a vehicle. Raw image frames from the video undergo pre-processing, followed by feeding through anomalous clutter tracker pipeline, exceedance detection pipeline using global clutter suppression pipeline and an optical flow pipeline. Image windows are generated by rejecting clutter using exceedance pixel locations to create image chips of the target and local background that are run through a convolutional neural network, classifying them as launches or background clutter. A Kalman filter is applied to at least one frame detection list to generate a launch detection list and causes the launch to be detected.

An optical system includes an external common entrance pupil, a front multispectral objective lens group configured to receive and direct electromagnetic radiation in the multispectral infrared wavelengths, and a first beamsplitter configured to receive electromagnetic radiation from the front objective lens group. The first beamsplitter further is configured to reflect electromagnetic radiation in the short wave infrared (SWIR) wavelength and the middle wave infrared (MWIR) wavelength and to transmit electromagnetic radiation in the long wave infrared (LWIR) wavelength. The optical system further includes a second beamsplitter configured to receive electromagnetic radiation from the first beamsplitter. The second beamsplitter further is configured to reflect electromagnetic radiation in the SWIR wavelength and to transmit electromagnet radiation in the MWIR wavelength. The optical assembly further includes a spectral hybrid optics groups configured to direct spectrum beams in the LWIR wavelength band, the MWIR wavelength band and the SWIR wavelength.

The invention relates to a method for measuring the surface type of a lens by using long-wave infrared band interference. The method comprises the following steps: acquiring a long-wave infrared interferometer which is adjusted in advance; the long-wave infrared interferometer emits a long-wave infrared light beam, the long-wave infrared light beam is reflected by the standard lens and the to-be-measured lens to form interference fringes, the to-be-measured lens is a milled lens, and the surface of the to-be-measured lens is a rough surface; and obtaining surface type data of the to-be-detected lens according to interference fringe analysis. The invention also relates to a system for measuring the surface type of the lens by using the long-wave infrared band interference. The method has the beneficial effects that the strong penetrability of long-wave infrared light is utilized, the long-wave infrared light can penetrate through the surface microstructure of the rough lens, the scattering interference is reduced, more reflected light participates in interference, the surface roughness can be analyzed more stably, the measurement time of the lens surface type is shortened, and the subsequent processing procedure can be carried out more timely.

The invention belongs to the technical field of infrared optical devices, and particularly relates to a long-wave infrared band 8-12 [mu] m narrow-band polarization-independent notch filter and a method. The long-wave infrared band 8-12 [mu] m narrow-band polarization-independent notch filter comprises a polished ZnSe substrate, a Ge zero-contrast grating layer, a ZnSe anti-reflection grating layer and two double-layer grating structures, and the two double-layer grating structures are in orthogonal cascade connection and used for achieving the polarization-independent characteristic. The preparation of the optical filter is completed through the six steps of substrate pretreatment, Ge film deposition through electron beam evaporation, grating pattern formation through laser direct writing gray exposure, Ge grating structure preparation through inductive coupling plasma etching, and ZnSe anti-reflection grating layer and orthogonal cascade double-layer grating structure deposition. The preparation method adopts the processes of laser direct writing, ICP etching, electron beam evaporation coating and the like, solves the problems of time consumption of traditional multilayer film deposition, polarization sensitivity of an existing GMR device and the like, and is suitable for the field of long-wave infrared photon and optoelectronic devices.