48 results about "Shortwave infrared" patented technology

An imaging sensor for imaging scenes based on both shortwave infrared and midwave infrared radiation is disclosed. The imaging sensor comprises pixels that include a photodiode that is selectively sensitive to shortwave infrared radiation based upon its bias voltage.

A fast and rigorous multivariate curve resolution (MCR) algorithm is applied to remotely sensed spectral data. The algorithm is applicable in the solar-reflective spectral region, comprising the visible to the shortwave infrared (ranging from approximately 0.4 to 2.5 μm), midwave infrared, and thermal emission spectral region, comprising the thermal infrared (ranging from approximately 8 to 15 μm). For example, employing minimal a priori knowledge, notably non-negativity constraints on the extracted endmember profiles and a constant abundance constraint for the atmospheric upwelling component, MCR can be used to successfully compensate thermal infrared hyperspectral images for atmospheric upwelling and, thereby, transmittance effects. Further, MCR can accurately estimate the relative spectral absorption coefficients and thermal contrast distribution of a gas plume component near the minimum detectable quantity.

A system for detecting ice or supercooled large droplets within an area of interest having a detection system measuring radiance or reflectance of the area of interest when exposed to shortwave infrared radiation having a wavelength in the range of about 2.05 μm to about 2.30 μm. The detection system measures the radiance or reflectance in a first band having a wavelength in the range of about 2.05 μm to about 2.15 μm and outputting a first band signal, and further measures the radiance or reflectance in a second band having a wavelength in the range of about 2.15 μm to about 2.30 μm and outputting a second band signal. A processing unit determines a ratio of the first band signal and the second band signal and compares the ratio to a predetermined critical ratio and outputs a determination signal indicating presence of ice or supercooled water droplets.

The invention belongs to the technical field of nano biological materials, and particularly relates to an 800nm-near-infrared-excited 1525nm-shortwave-infrared-emission fluorescence nano material and a synthesis method thereof. The fluorescence nano material is a one-core / three-shell core-shell structure nanocrystal material composed of a nucleating center, a shortwave infrared light-emitting layer, an energy transmission layer and an energy absorption layer, wherein the nucleating center provides a crystal core for growth of the other three layers and limits the particle size of the nanocrystal; the shortwave infrared light-emitting layer is used for absorbing exciting light with specific wavelength and emitting shortwave infrared light; the energy transmission layer is used for transmitting energy between the energy absorption layer and shortwave infrared light-emitting layer; and the energy absorption layer is used for absorbing energy and transferring the energy to the energy transmission layer. The three-layer structure design widens the exciting light from 980nm to 800nm or so, and implements the Nd<3+>->Yb<3+>->Er<3+> energy transfer process. Due to the ideal excitation and emission wavelengths, the material can be used for deep tissue in-vivo imaging.

A system for detecting ice or water within an area of interest having a detection system measuring radiance or reflectance of the area of interest when exposed to shortwave infrared radiation having a wavelength in the range containing a crossover point between the curves representing the absorption of electromagnetic radiation by ice and water. The detection system measures the radiance or reflectance in a first band having a wavelength in a spectral band on a first side of the crossover point and outputting a first band signal, and further measures the radiance or reflectance in a second band having a wavelength in a spectral band on a second opposing side of the same crossover point and outputting a second band signal. A processing unit determines a ratio of the first band signal and the second band signal and compares the ratio to a predetermined critical ratio and outputs a determination signal indicating presence of ice or water.

The invention discloses a shortwave infrared day and night remote multispectral imager and an imaging method. A light filter wheel splits light after optical signals pass through a shortwave infrared lens, and a detector component and an electronic portion complete photovoltaic conversion and image data acquisition and output images. A laser device outputs lasers of corresponding wavelengths for lightening according to current imaging wave bands and completes multispectral imaging matching with the light filter wheel. According to the shortwave infrared day and night remote multispectral imager and the imaging method, good atmosphere transmission characteristics of shortwave infrareds are used to perform remote multispectral observation; and shortwave infrared large-power tunable lasers which are invisible by human eyes are assisted to lighten corresponding bands, and night imaging is achieved.

A lightweight, compact hyperspectral imaging system includes a fore-optics module and a wavelength-dispersing module. The imaging system may also include a detector, supporting electronics and a battery module. The fore-optics module may include a telescope with three or more mirrors, where the mirrors include a silver coating that provides high reflectivity over wavelengths in the visible and shortwave infrared portions of the spectrum. The modules of the imaging system may be incorporated in a housing having a longest linear dimension of 16 inches or less. The housing may be cylindrical in shape and have a length of 14 inches or less inches and a diameter of 8 inches or less.

A system for detecting ice or water within an area of interest having a detection system measuring radiance or reflectance of the area of interest when exposed to shortwave infrared radiation having a wavelength in the range containing a crossover point between the curves representing the absorption of electromagnetic radiation by ice and water. The detection system measures the radiance or reflectance in a first band having a wavelength in a spectral band on a first side of the crossover point and outputting a first band signal, and further measures the radiance or reflectance in a second band having a wavelength in a spectral band on a second opposing side of the same crossover point and outputting a second band signal. A processing unit determines a ratio of the first band signal and the second band signal and compares the ratio to a predetermined critical ratio and outputs a determination signal indicating presence of ice or water.

Methods, a computer-readable medium, and a system are provided for determining whether a data point indicates a presence of a cloud using visible near-infrared data and short wavelength infrared data. A first comparison of a cirrus-band reflectance of the data point with a threshold cirrus-band reflectance value is made, classifying the data point as a cloud point if the cirrus-band reflectance of the data point exceeds the threshold cirrus-band reflectance value. When the comparing of the cirrus-band reflectance of the data point with the threshold cirrus-band reflectance value does not classify the data point as a cloud point, a further analysis is performed, including performing a second or more comparisons of additional cloud indicators derived from at least one of the visible, near-infrared, and short wavelength infrared data with related empirically-derived, landcover-dependent thresholds for classifying the data point as a cloud point or a non-cloud point.

The invention discloses a ginger rapid drying device, which comprises a machine body, a fluidized bed and a ginger conveying wire belt penetrating the machine body, wherein the machine body is sequentially divided into a shortwave infrared heating area, a medium-wave infrared heating area and a far-infrared heating area, a shortwave infrared heating pipe nest is arranged on the inner upper part of the shortwave infrared heating area, a medium-wave infrared heating pipe nest is arranged on the inner upper part of the medium-wave infrared heating area, a far-infrared heating pipe nest is arranged on the inner upper part of the far-infrared heating area, the top of the far-infrared heating area is provided with an air inlet, and the top of the shortwave infrared heating area and the top of the medium-wave infrared heating area are respectively provided with an air outlet; and the fluidized bed comprises a bed body and a blower, wherein the blower is communicated with the bed body, the bed body is provided with an air blowing hole, and the bed body of the fluidized bed is arranged inside the shortwave infrared heating area and the medium-wave infrared heating area and is closely abutted against the lower side of the ginger conveying wire belt. By adopting a way combining the infrared heating and the fluidized bed as well as the hot air circulation, a purpose for rapidly drying ginger is realized, and simultaneously the ginger can be prevented from being discolored.

The invention discloses a shortwave infrared telescope lens which is formed by the configuration of a first lens group with positive focal power, a second lens group with negative focal power and a third lens group with positive focal power from an object side orderly. The second lens group is formed by single lens elements. In the time of focusing, the second lens group moves along an optical axis, and the first lens group and the third lens group are fixed relative to an imaging surface. The invention provides the shortwave infrared telescope lens with a small size, light weight, large diameter, high resolution, excellent imaging performance and an inner focusing mode.

The invention relates to a method and device for the forming of bodies (2) made from glass or glass ceramic in order to produce a three-dimensional end product. A short-wave IR radiation is thus used, furthermore a mould for forming a three-dimensional body made from glass or glass ceramic. According to the invention, the mould is made from a material with a high reflectivity or a high degree of remission thus cooling the mould.

The invention discloses an InGaAs shortwave infrared detector signal processing system. The InGaAs shortwave infrared detector signal processing system comprises an InGaAs shortwave infrared detector, a signal input end, a differential single-end converting circuit, a signal modulating and filtering circuit, an analog-digital conversion circuit, and a data processing circuit. Through the differential single-end converting circuit, the system realizes the signal impedance matching, amplification, and supporting of main backup interfaces; through being treated by the signal modulating and filtering circuit, the signal enters the analog-digital conversion circuit and outputs digital-form data; finally, the data is transmitted to the data processing circuit. Compared with the traditional InGaAs shortwave infrared detector signal processing system, the InGaAs shortwave infrared detector signal processing system is low in circuit leading noise, main backup in an input end supporting system, strong in anti-jamming ability, and so on.

The invention provides a crop biomass remote sensing estimation method considering water stress. The method comprises the steps of S1: obtaining optical remote sensing data with a near-infrared waveband and a shortwave infrared waveband in a target region; S2: performing atmospheric correction processing on the obtained optical remote sensing data to obtain real surface reflectivity data of the target region; S3: extracting a planting space distribution region of crop; S4: determining a normalized vegetation index and a time integral value of the crop; S5: obtaining a water stress coefficient of the crop; S6: obtaining a biomass conversion coefficient of the crop; and S7: building a biomass estimation model of the crop. The method is in favor of estimating the biomasses of the crop in different growth periods more accurately in regional scale, and has important application values in the aspects of further realizing crop growth trend monitoring, yield estimation, drought monitoring, drought loss assessment and the like.

The invention relates to a large-view-field passive athermalization shortwave infrared optical system which comprises a first lens, a second lens, a third lens, a aperture diaphragm, a fourth lens, a fifth lens, a sixth lens and a focal plane of a detector which are in coaxial arrangement from the object side to the image side in sequence. The whole optical system meets the requirements that the focal power distribution of each lens meets total focal power requirement, meets the total color difference coefficient requirement and meets the requirement of not producing temperature defocus. By utilizing only six lenses, optical passive athermalization can be carried out on the large-view-field high-resolution shortwave infrared optical system; an aspherical lens group is introduced to correct spherical aberration and comatic aberration; by introducing three optical materials simultaneously, heat aberration is effectively corrected; and thermal constants of different materials are utilized to be cooperated with the thermal expansion coefficient of the material of a lens cone, so that defocus caused by the thermal constants of the lenses during temperature variation is allowed to be just consistent with image surface movement caused by thermal expansion coefficient of the material of the lens cone, and very good athermalization effect is achieved.

The present invention discloses a visible infrared broad band absorber and a preparation method thereof. The device is formed by a multilayer structure consisting of a metal bottom layer, a polymer granular layer, a metal interface layer, a dielectric layer and a metal outer layer in order from a substrate to up. The operating wavelength of the absorber can cover the visible light wave band ( 0.4-0.8[Mu]m) and shortwave infrared band ( 1.1-3[Mu]m), medium wave infrared band ( 3-6[Mu]m) and long wave infrared band ( 6-14[Mu]m). The peak value absorptivity A can reach 99%, and the full width at half-maximum can reach 2[Mu]m. The visible infrared broad band absorber is high in absorption efficiency, wide in operation band and adjustable in wavelength; the visible infrared broad band absorber is not sensitive to incident light polarization and angle; and the visible infrared broad band absorber is simple in technology and low in cost, can perform large-scale preparation and can be grown on a flexible substrate, etc.

The invention discloses a shortwave infrared image detection device adopting an up-conversion luminescent material, and belongs to the technical field of infrared imaging. The conventional shortwave infrared image detection device is complex in structure, high in cost and low in response speed, and has noise interference. According to the shortwave infrared image detection device adopting the up-conversion luminescent material provided by the invention, an imaging lens is positioned in front of a photodetector; a photodetector drive unit, an image storage unit and an imaging processing unit in a field programmable gate array (FPGA) master control chip are connected with the photodetector; the imaging processing unit is also connected with the image storage unit and a communication interface; the imaging lens is a visible light imaging lens; the photodetector is a visible photodetector; and an up-conversion luminescent material plate is positioned in front of the visible light imaging lens. The shortwave infrared image detection device adopting the up-conversion luminescent material is used for acquiring shortwave infrared images.

A system for detection and identification of objects and obstacles near, between or on railway comprise several forward-looking imagers adapted to cover each different range forward and preferably to be sensitive each to different wavelength of radiation, including visible light, LWIR, and SWIR. The substantially homogeneous temperature along the rail the image of which is included in an imager frame assists in identifying and distinguishing the rail from the background. Image processing is applied to define living creature in the image frame and to distinguish from a man-made object based on temperature of the body. Electro optic sensors (e.g. thermal infrared imaging sensor and visible band imaging sensor) are used to survey and monitor railway scenes in real time.

The invention discloses an InGaAs short-wave infrared detector signal processing system, which comprises an InGaAs short-wave infrared detector, a signal input terminal, a differential single-end conversion circuit, a signal conditioning filter circuit, an analog-to-digital conversion circuit, and a data processing circuit. The system realizes signal impedance matching, amplification, and main-backup interface support through a differential single-ended conversion circuit. The signal is processed by a signal conditioning filter circuit, and then enters an analog-to-digital conversion circuit to output digital data, and finally transmits the data to a data processing circuit. middle. Compared with the traditional InGaAs short-wave infrared detector signal processing system, it has the characteristics of low noise introduced by the circuit, the input terminal supports system main backup, and strong anti-interference ability.

A system for detection and identification of objects and obstacles near, between or on railway comprise several forward-looking imagers adapted to cover each different range forward and preferably to be sensitive each to different wavelength of radiation, including visible light, LWIR, and SWIR. The substantially homogeneous temperature along the rail the image of which is included in an imager frame assists in identifying and distinguishing the rail from the background. Image processing is applied to define living creature in the image frame and to distinguish from a man-made object based on temperature of the body. Electro optic sensors (e.g. thermal infrared imaging sensor and visible band imaging sensor) are used to survey and monitor railway scenes in real time.

An imaging apparatus includes a camera with a solid-state sensor and an illumination selector. The illumination selector is arranged for optical coupling with the sensor and arranged for communicating electromagnetic radiation within a shortwave infrared narrowband to the sensor. The shortwave infrared narrowband includes a peak absorption or peak reflection wavelength of moisture to infrared illumination to image moisture disposed within a solar cell array.

The invention discloses a long-pupillary-distance and shortwave infrared spectral imaging objective lens. The objective lens comprises five optical lenses which are sequentially arranged on a system optical axis from a light bar to an image surface. An achromatism glass pair with the focal power of positive, negative and negative is formed by the first three optical lenses. A very good achromatism capability is achieved on the short wave infrared outer section through the combination of fluoride glass and dense flint glass, and meanwhile a high spectrum transmittance rate is achieved. The fourth optical lens is used for balancing astigmatism and the curvature of field of the system to increase the view field capability of the imaging objective lens. The fifth optical lens is used for further compensating for the astigmatism of the objective lens and meanwhile is used for meeting the requirement of the imaging objective lens for telecentric performance in image space. Finally, the requirement for the achromatism in the long papillary distance and shortwave infrared band can be met.

The invention provides a short-wave infrared driver's vision enhancement system, which includes a short-wave infrared transmission lens, a short-wave infrared imaging device, a comprehensive data processing device, a control module, a power supply module, a display device, and a short-wave infrared transmission lens connected to the short-wave infrared imaging device. , the integrated data processing device is connected to the short-wave infrared imaging device through a data transmission line, connected to the display device through a video signal line, the control module is connected to the short-wave infrared imaging device and the comprehensive data processing device through a control line, and the power module provides the power required by the system. All the above devices are installed in the cab. The present invention has the advantages of: utilizing the characteristics of short-wave infrared penetrating glass, the short-wave infrared driver's vision enhancement system is installed in the driver's cab, which makes up for the deficiency that the long-wave infrared vision enhancement system cannot penetrate the glass and needs to be installed outside the vehicle, and at the same time reduces the structural Windproof, rainproof, anti-theft and other requirements.

An artificial intelligence-based infrared thermal imaging body temperature detection method, apparatus, and terminal device, for improving the accuracy and efficiency of body temperature detection. The detection method comprises: by means of a camera arranged on a tripod head collecting images, identifying a detection target and the exposed body parts of the detection target (S101); in response to shortwave infrared rays of the exposed body parts and shortwave infrared rays in the environment in which the detection target is located, detecting the body surface temperature of the detection target and the ambient temperature of the environment in which the detection target is located (S102); substituting the body surface temperature of the detection target and the ambient temperature of the environment in which the detection target is located into an algorithmic formula, and acquiring the core body temperature of the detection target (S103); and sending the core body temperature of the detection target to a medical care server (S104). The present method can simultaneously detect the body temperature of multiple detection targets, greatly improving the efficiency of temperature detection, and also improves the accuracy of body temperature detection.

A multiband IR adjunct (MIRA) sensor to spectroscopically determine the content and the concentration of chemical composition of a targeted object, includes a sensor housing, a first front optics in a first optical channel, a second front optics in the first optical channel, an acousto-optic tunable filter (AOTF), a photo detector (PD), a set of back optics in the first optical channel that focuses polarized narrow-band light beams received from the AOTF device onto the PD, the PD converting the polarized narrow-band light beams into an electrical signal, and a data acquisition unit signal-connected to the PD, the data acquisition unit collecting the electrical signals. Multiple optical channels can be provided within the housing to analyze UV / VIS / near infrared (NIR), short-wavelength infrared (SWIR), mid-wavelength infrared (MWIR), and LWIR wavelength ranges respectively.

The invention discloses a ginger rapid drying device, which comprises a machine body, a fluidized bed and a ginger conveying wire belt penetrating the machine body, wherein the machine body is sequentially divided into a shortwave infrared heating area, a medium-wave infrared heating area and a far-infrared heating area, a shortwave infrared heating pipe nest is arranged on the inner upper part of the shortwave infrared heating area, a medium-wave infrared heating pipe nest is arranged on the inner upper part of the medium-wave infrared heating area, a far-infrared heating pipe nest is arranged on the inner upper part of the far-infrared heating area, the top of the far-infrared heating area is provided with an air inlet, and the top of the shortwave infrared heating area and the top of the medium-wave infrared heating area are respectively provided with an air outlet; and the fluidized bed comprises a bed body and a blower, wherein the blower is communicated with the bed body, the bed body is provided with an air blowing hole, and the bed body of the fluidized bed is arranged inside the shortwave infrared heating area and the medium-wave infrared heating area and is closely abutted against the lower side of the ginger conveying wire belt. By adopting a way combining the infrared heating and the fluidized bed as well as the hot air circulation, a purpose for rapidly drying ginger is realized, and simultaneously the ginger can be prevented from being discolored.

The invention discloses an emulsion paint film maintaining device, which comprises a tank body with ventilation openings on opposite side walls, a magnifying lens panel inlaid on a top wall of the tank body, LED (Light-emitting Diode) lamp beads arranged on edges of the magnifying lens panel, a short wave infra-red light heating lamp arranged on an inner surface of the top wall of the tank body, asample table arranged on a bottom wall of the tank body, a thermoinduction element arranged on an edge of the sample table, and a controller device, wherein a side door is also arranged on one side wall of the tank body; the control device is connected with the LED lamp beads, the short wave infra-red light heating lamp and the thermoinduction element. The invention also discloses a test method of color-modulable emulsion paint color stability. The test method of the color-modulable emulsion paint color stability is clear in operation, so that repeated trials caused by test errors or personalerrors or test inconvenience are effectively reduced; by using the emulsion paint film maintaining device, the test period is greatly shortened, the production efficiency is effectively improved, andthe device has a higher practical value.

The invention relates to a fire detection method based on multi-temporal Landsat-8 OLI image short-wave infrared, comprising the following steps: 1) acquiring satellite fire area image data, and preprocessing the temporal images before and after the fire; 2) after preprocessing Calculate the NBRSWIR index map from the image; 3) Perform a difference operation on the index maps of the front and back phases to obtain the NBRSWIR difference map, and judge the fire area based on the NBRSWIR difference map. Compared with the prior art, the present invention has the advantages of being accurate, fast, effective and practical.