182 results about "Visible infrared" patented technology

A marking carried by a physical object and discernible by an infrared (IR) sensor is at least partially concealed from the human eye. The marking is covered with a coating that is at least partially opaque in the visible spectrum and at least partially transparent in the IR spectrum (or other non-visible spectrum). The marking is thus not apparent to a human eye or to visible light sensors, while remaining discernible in the IR spectrum. Using the present invention to prevent a user from detecting the marking adds intrigue to the detection of the object, since the workings of the IR sensor that enable the sensor to identify the marking are not evident to a user. The present invention is also beneficially employed in games where it is desirable that an opponent be unable to see a marking that is detectable by the IR sensor.

A broadband mirror, polarizer, or other reflector includes separate stacks of microlayers. Microlayers in each stack are arranged into optical repeat units, and the stacks are arranged in series. At a design angle of incidence such as normal incidence, the second stack provides a second 1st order reflection band and a distinct second 2nd order reflection band with a second spectral pass band therebetween. The first stack provides a first 1st order reflection band that fills the second spectral pass band such that a single wide reflection band is formed that includes the first 1st order reflection band, the second 1st order reflection band, and the second 2nd order reflection band. In some cases, the single wide reflection band can include a first 2nd order reflection band of the first stack. In some cases, the first and second stacks may have apodized portions which monotonically deviate from respective baseline portions.

The present invention relates to a wireless camera device for use with a gun, in which a wireless camera is provided with a main body having fastening areas and fastening members which correspondingly fit slide rails on a gun body to enable installation thereto. Two sides of the main body are respectively equipped with key-presses to enable activating an image capture member and sight units, which are located close to the position of the muzzle. Moreover, aiming light sources produced by the sight units are represented in image signals and simultaneously transmitted by wireless means to a display device, thereby achieving the effectiveness to carry out infrared aiming based on the image signals and enabling the display device to simultaneously display that from the infrared aiming, while visible infrared light or invisible infrared light produced by the aiming light sources enable respective daytime or evening aiming and firing.

The invention relates to a visible-infrared compatible stealth device, belonging to the technical field of military stealth. The device comprises a 14-layer laminated structure, wherein the 14-layer laminated structure respectively comprises an infrared transparent packaging layer 1, a first flexible transparent substrate 2, a first transparent electrode 3, an active photochromic material layer 4, a polyelectrolyte-adsorbed porous membrane carrier 5, an ion storage layer 6, a second transparent electrode 7, a second flexible transparent substrate 8, a third transparent electrode 9, an electrolyte-adsorbed porous membrane carrier 10, a photon crystal layer 11, a metal electrode layer 12, a flexible substrate material 13 and an infrared transparent packaging layer 1. The visible-infrared compatible stealth device provided by the invention belongs to a flexible device, and is a flexible lamellar structure. The thickness of the device is less than 2 millimeters, and the total thickness of each functional layer is less than 0.5 millimeter. The device can implement continuously variable visible-light all-spectrum color, the infrared emittance modulation amplitude can reach 50% or so, and the device has great application potential in the field of visible-infrared stealth.

The invention discloses a Fourier transform chip spectrometer based on integrated light technique, comprising an integrated optical waveguide chip having electro-optic modulation function. Light from a light source enters the integrated optical waveguide chip through a fiber transmission coupler, and waveguide light from the chip enters an optical waveguide interferometer through a sensitive window interval. The interferometer outputs signals to a photoelectric detector. A voltage function generator is used for applying voltages varying with time between two modulated electrodes of the optical waveguide interferometer, the photoelectric detector is used for real-time measuring the change of the signal strength of the interferometer varying with the modulated voltage, and a signal processing chip connected with the photoelectric detector and the voltage function generator at same time is used for rapidly processing Fourier transform on the signals of the interferometer to obtain an incident light spectrum. The Fourier transform chip spectrometer provided by the invention can determine visible-infrared light absorbing spectra of solids, liquid, even monomolecular adsorption layers in the sensitive window, and determine fluorescence spectra of fluorescent substances in the sensitive window, with the advantages of strong anti-interference capability, and is suitable for rapid on-site quantitative determination.

The invention relates to a metnod for the assembling adjusting and standardization of a visible-infrared light compound optical path optical axis parallelism detector, which is characterized in that: placing a standard plane mirror on the back of the visible-infrared light compound optical path optical axis parallelism detector to roughly adjust the detector; placing a reflecting collimator and a high-temperature cross wire respectively on the back and the focal plane of the visible-infrared light compound optical path optical axis parallelism detector; electrifying the high-temperature cross wire to emit visible light wave and infrared light wave; adjusting the reflecting collimator to ensure the complete coincidence of the emitting visible cross wire image and the visible light image of the high-temperature cross wire on visible light CCD; adjusting the infrared part of the visible-infrared light compound optical path optical axis parallelism detector to ensure the completer coincidence of the infrared laser spot on infrared CCD and the infrared image of the high-temperature cross wire; standardizing the detector and calculating the optical axis parallelism difference between the visible light wave and the infrared light wave after the visible light and the infrared light gather in the same optical system with the help of software processing algorithm. The method has the advantages of convenient assembling adjustment and high precision.

The invention provides a self-driven photodetector based on an FTO / ZnO nanorod / CH3NH3PbI3 / MoO3 / Au structure and a preparation method thereof. The specific structure comprises an FTO layer and a ZnO nanorod which is an electron transporting layer and a hole blocking layer. CH3NH3PbI3 is a perovskite light absorbing layer. Semiconductor oxide MoO3 is a hole transporting layer and an electron blocking layer. A metal electrode is made of an Au film. The self-driven photodetector is synthesized through spin coating and water bath and is prepared through evaporation and the like. According to the invention, an organic-inorganic hybrid heterojunction structure formed by the ZnO nanorod / CH3NH3PbI3 is used; the semiconductor oxide MoO3 is the hole transporting layer; the self-driven photodetector has the advantages of high response degree and sensitivity; the response rate and the detection rate are respectively up to 24.3A / W and 3.56*1014cmHz1 / 2 / W; the self-driven photodetector has a certain degree of self-driven capacity and does not need the drive of external bias, which is conducive to energy conservation; the performances are far more than the performances of a currently reported Si-based detector; near-ultraviolet and visible infrared detection can be realized; and the self-driven photodetector has the advantages of simple operation steps, low experiment cost and good application prospect.

The invention discloses a visible-infrared bi-pass camera, which comprises an imaging device, an infrared light-path access, a visible light light-path access, an FPA (floating-point accelerator) chip, a visible light reading light-path and an optical receiver, wherein the imaging device comprises a visible-infrared imaging objective lens; the visible-infrared imaging objective lens comprises a light splitting device; the infrared light-path access is used for imaging the infrared light obtained from the light splitting of the light splitting device on the FPA chip through the infrared light-path access; the visible light light-path access is used for reading the image information on the FPA chip and reflecting the image information on the optical receiver; and the imaging device is used for imaging the visible light obtained from the light splitting of the light spitting device on the optical receiver through the visible light light-path access. According to the visible-infrared bi-pass camera disclosed by the embodiment of the invention, the splitting of the visible light and the infrared light on a light-path space is realized through light splitting devices, the infrared light imaging is realized by using the FPA chip, and the imaging information is read by the visible light light-path access and is displayed on the optical receiver subsequently, so that the system cost is reduced, and meanwhile the power consumption is reduced.

An imaging spectrometer, covering the visible through infrared wavelengths, which disperses the light by a plane diffraction grating behind a wedged optical element. This design uses an achromatic doublet lens with a reflective coating on its convex back surface to produce the spectra on a flat detector. Spatial keystone distortion and spectral smile are controlled to less than one tenth of a pixel over the full wavelength range, facilitating the use of simple retrieval algorithms.

The invention relates to an intelligent extraction method of a build-up area on the basis of nighttime light data. The intelligent extraction method comprises the following steps: adopting an adaptive particle swarm optimization algorithm to realize the optimal selection of the selection parameters of a VIIRS (Visible Infrared Imaging Radiometer Suite) nighttime light image sample and a MODIS (Moderate Resolution Imaging Spectroradiometer) normalized difference vegetation index image sample; adopting a region growing algorithm based on SVM (Support Vector Machine) classification to finish SVM model training, and adopting a cross validation method to carry out precision validation on the model; and according to an optimized parameter, determining a city sample and a non-city sample, and adopting the region growing algorithm based on the SVM to extract a city built-area range. By use of the intelligent extraction method, from a sample selection source, the adaptive optimization of a sample selection parameter is carried out, and the SVM and the region growing algorithm are adopted to improve processing efficiency and precision for the nighttime light data to extract the nighttime light data.

The invention discloses a vibration-rotational Raman-Mie scattering multi-wavelength laser radar system and a working method thereof. The system comprises a first system and a second system, wherein the first system works in an ultraviolet wave segment, the second system works in a visible infrared wave segment, and the first system and the second system both comprise laser emission units, optical receiving units, signal detection and data collecting units and control units. The laser emission units are used for emitting lasers to air, the optical receiving units are used for receiving back scattering echo signals of the air on the lasers emitted by the laser emission units, and conduct rotational Raman, vibration Raman and elastic scattering light splitting on the back scattering echo signals, the signal detection and data collecting units are used for obtaining parameter information of air temperature, water vapor, aerosol and cloud from the back scattering echo signals after light splitting, and the control units are used for controlling the laser emission units, the optical receiving units and the signal detection and data collecting units to run. The vibration-rotational Raman-Mie scattering multi-wavelength laser radar system and the working method of the system can achieve all-weather air comprehensive continuous automatic observation.

The invention relates to a kind of absorption transparent coating for visible and infrared light as well as its preparation and application. The coatings is prepared as follow: Firstly, it mixes alpha-methyl acrylate, methyl methacrylate, azobisisobutyronitrile, tributyl phosphate according to the ratio of 1-2:10-12:1-1.5:2-4, then it prepolymerizes them in water to a viscosity of 100 ~ 500cP to achieve the bonding agent of the infrared absorption coating. Secondly, it takes out 40%~60% of the above bonding agent and adds the nano-particles of TiO2, Fe3O4, MnO2, CuO, CdTe, PbS and / or Cr2O3 to achieve an organic near infrared absorber, then it mixes the organic near infrared absorber and the remaining bonding agent to achieve the visible infrared absorption transparent coating.

The invention discloses a visible-infrared independent control electrochromic device. The structure of the visible-infrared independent control electrochromic device comprises a first transparent electrode, a first electrochromic layer for only regulating visible light under a high-voltage condition, a second electrochromic layer for only regulating infrared light transmittance under a low-voltagecondition, an ion conduction layer and a second transparent electrode which are arranged in sequence, wherein the high voltage ranges from-5 V to 5 V, and the low voltage ranges from-2.5 V to 2.5 V.The first electrochromic layer capable of adjusting visible light and the second electrochromic layer capable of only adjusting infrared light are designed, so that the transmittance of the infrared light and the transmittance of the visible light are independently adjusted and controlled under different voltages, and the requirements of actual life are met.

The invention provides an ATR spectrum measurement type Fourier transform spectrometer based on integrated optical waveguide. The spectrometer comprises an integrated optical waveguide electro-optical modulator, a voltage function generator, a broadband light source, a photoelectric detector, a signal processing chip and a fiber having an ATR sensitive window. According to the invention, light from the light source is coupled into the fiber, passes through an ATR sensitive window zone along the fiber and coupled into the integrated optical waveguide electro-optical modulator; voltage varying with time is applied on the integrated optical waveguide electro-optical modulator by using the voltage function generator, the intensity of output light of the integrated optical waveguide electro-optical modulator is measured by using the photoelectric detector simultaneously, and the signal processing chip connected with the photoelectric detector and the voltage function generator carries out Fourier transform processing on measured optical signals so as to obtain the spectrum of incident light. The spectrometer provided in the invention can determine visible-infrared absorption spectrum of solid, liquid and monomolecular layers adsorbed on the surface of the ATR sensitive window, has strong anti-interference capability and is applicable to on-site rapid quantitative detection.

At least one two-dimensional infrared grid is projected onto a three-dimensional subject in order to determine or represent contours of the subject based on distortion of the grid. The grid is separated from a composite visible-infrared image by a beam splitter. If two grids are superposed for a stereoscopic effect, the two grids preferably have different infrared wavelengths and are separable by a second beam splitter.

A broadband mirror, polarizer, or other reflector includes at least one stack of microlayers. Microlayers in the stack are arranged into optical repeat units. At a design angle of incidence such as normal incidence, the stack provides a 1st order reflection band, a 2nd order reflection band, and optionally a 3rd order reflection band. The 2nd order reflection band overlaps, or substantially overlaps, the 1st and / or 3rd order reflection bands to form a single wide reflection band. The wide reflection band may include the 2nd and 1st but not a 3rd order reflection band, or the 2nd and 3rd but not the 1st order reflection band, or it may include the 1st, 2nd, and 3rd order reflection bands, as well as still higher order reflection bands. The wide reflection band may cover at least a portion of visible and infrared wavelengths.

A broadband mirror, polarizer, or other reflector includes at least one stack of microlayers. Microlayers in the stack are arranged into optical repeat units. At a design angle of incidence such as normal incidence, the stack provides a 1st order reflection band, a 2nd order reflection band, and optionally a 3rd order reflection band. The 2nd order reflection band overlaps, or substantially overlaps, the 1st and / or 3rd order reflection bands to form a single wide reflection band. The wide reflection band may include the 2nd and 1st but not a 3rd order reflection band, or the 2nd and 3rd but not the 1st order reflection band, or it may include the 1st, 2nd, and 3rd order reflection bands, as well as still higher order reflection bands. The wide reflection band may cover at least a portion of visible and infrared wavelengths.

The invention provides a flexible perovskite solar cell and a preparation method thereof. A structure of the flexible perovskite solar cell provided by the invention comprises an electron-transporting layer, a compounded light absorption layer, a hole-transporting layer and a counter electrode in sequence on a flexible substrate; the electron-transporting layer is black phosphorus; and the light absorption layer is a black phosphorus / inorganic perovskite structure compounded light absorption layer. The invention further provides the preparation method of the solar cell. In the flexible perovskite solar cell and the preparation method thereof provided by the invention, compared with a metal oxide semiconductor taken as the electron-transporting layer, the electron-transporting layer composed of the black phosphorus can be thermally treated under the condition of a lower temperature (less than 150 DEG C), and simultaneously has more excellent electron transport performance and is suitable for being applied to a flexible device; and in addition, by adopting the black phosphorus / inorganic perovskite structure compounded light absorption layer, the absorption spectrum of the solar cell can be expanded to a visible-infrared band, and the photoelectric conversion efficiency and the stability of the perovskite solar cell are improved.

The invention discloses an asynchronous variable transmission code rate image acquisition method and a system thereof of a large-view field TDI-CCD (Time Delayed Integration-Charge Coupled Device) infrared dual-channel camera. In the dual-channel image acquisition method, the variable code rate data of double channels is synchronized by adopting a mode of software and hardware pipelining, and a double-thread and double-buffering mode in software is combined, thereby effective data can be guaranteed to be not lost. The dual-channel image acquisition system comprises infrared detectors, a TDI-CCD, an experimental optical system, a platform, a detector driving plate, an image acquisition plate, a PCI7300A acquisition card and upper computer image acquisition software and solves the problems of asynchronous data in the large-view field camera and high-speed real-time synchronous acquisition and display of two detectors with different code rates from two aspects of hardware and software, wherein the used hardware and software platform can be directly applied to similar dual-channel image data acquisition tasks and also expanded to multi-channel variable code data acquisition tasks.

A visible-near infrared area broadband perfect absorber is featured by comprising a metal film, a medium film and a metal-medium stack layer; the metal-medium stack layer is arranged on the medium film; the medium film is arranged on the metal film; the metal-medium stack layer is formed by periodically arraying metal-medium composite structures. The solar energy full spectrum scope perfect lightabsorber has the high temperature and heat resistance physics property, thus effectively preventing metal ohmic losses, heat effect and thermal unstability problems, and realizing broadband absorptionof UV-visible-infrared wave bands; the electromagnetic wave in the solar energy full spectrum scope can be perfectly absorbed; the solar energy full spectrum scope perfect light absorber can be widely applied to the photoelectric devices under high temperature and heat resistance conditions, such as infrared detection and photoelectric conversion, infrared imaging, solar energy anti-reflection coating and heat radiator fields.

The invention discloses a superconductivity nanometer single photon detecting chip. The superconductivity nanometer single photon detecting chip comprises a substrate, an active layer, insulating layers and a photon absorbed layer. The active layer comprises at least two superconductivity nanometer wires, and is arranged on the upper surface of the substrate in a zigzag structure mode. The photon absorbed layer is a carbon nanometer tube layer, and is arranged on the active layer. The portion between the two superconductivity nanometer wires is filled with the insulating layer, and the portion between the superconductivity nanometer wires and the photon absorbed layer is filled with the insulating layers. The invention further provides a preparing process of the superconductivity nanometer single photon detecting chip. The preparing process greatly improves the photon absorbing probability of a detector chip and improves the absorbable photon wave band to be the ultraviolet-visible light-infrared wave band, so that the system efficiency of a detector is improved, and the superconductivity nanometer single photon detecting chip is high in efficiency, and wide in working wave band and in application range.

The invention discloses a method for obtaining light source spectra. The method includes the following steps that: a plurality of monochromatic light sources of which the wavelength is known are utilized to measure half-wave voltage of an integrated optical waveguide electro-optic modulator under different wavelengths, and the monotonic function relationship between the half-wave voltage and the wavelengths is established; and after an unknown light source is connected with the same integrated optical waveguide electro-optic modulator, an interference pattern of linear change with modulation voltage of the integrated optical waveguide electro-optic modulator is measured, and the measured interference pattern is subjected to Fourier transform, such that a distribution curve of incident light power with the half-wave voltage is obtained, and a distribution curve of the incident light power with the wavelengths can be obtained through utilizing the established monotonic function relationship between the half-wave voltage and the wavelengths, and then, the spectra of the unknown light source can be obtained. With the method of the invention adopted, the determination of various kinds of parameters of the integrated optical waveguide electro-optic modulator is not required. The method is advantageous in simple operation, high precision and strong anti-interference ability, and can be used for determining the spectra of light sources and measuring visible-infrared absorption spectra and fluorescence spectra of substances.

The invention relates to an in-situ preparation method of photocatalyst strontium bismuth niobium oxide containing an oxygen vacancy defect. The method comprises the following steps of adopting a molten-salt growth method to synthesize a SrBi2Nb2O9 nanosheet, putting the SrBi2Nb2O9 nanosheet at H2 atmosphere, using ultraviolet-visible-infrared light for full-spectrum illumination, and obtaining SrBi2Nb2O9-VO. Compared with a traditional method that the oxygen vacancy defect is produced by calcining a sample at inert atmosphere or reducing atmosphere, the method for producing the oxygen vacancy defect provided by the invention is simpler, more effectively, lower in required cost, and favorable to take full advantage of sunlight. According to the method, not only can the oxygen vacancy defect be in-site produced on a catalyst, but also the catalyst can utilize the produced oxygen vacancy defect for improving the own performance in photocatalytic reducing CO2. Meanwhile, the method is hopefully applied in other oxygenous Bi-based photocatalysts.

The invention provides a high temperature solar power selective absorption coating with a Si3N4 and AlN double ceramic structure and a preparation method thereof, belonging to a technology field of solar power utilization. An infrared emission layer, an absorbing layer, an antireflection layer are arranged in sequence from a bottom layer of the coating to a surface layer, wherein the first infrared emission layer consists of a Cu film or an Ag film, with a thickness ranging from 50 to 150 nm, the second layer absorbing layer includes a two-sublayer structure with both sublayers being an Si3N4 and AIN film, and the third antireflection layer is a SiO2 film with a thickness being 20 to 60 nm. The coating provided in the invention is characterized by a high absorption rate within a visible-infrared spectrum and a low emission rate within an infrared spectrum. The coating has favorable middle-and-high temperature heat stability by adopting an interference absorbing layer of the double ceramic structure. The coating has advantages of simply preparation technique, easy operation, easy control, and shortened production cycle.

The invention provides a high-temperature solar selective absorbing coating with a SiO2 and Cr2O3 double-ceramic structure and a preparation method thereof, belonging to the technical field of solar energy utilization. The coating sequentially comprises an infrared reflection layer, an absorbing layer and an anti-reflection layer from the bottom to the surface, wherein a first layer, namely the infrared reflection layer is a Cu or Ag film with the thickness of 50-250 nm; a second layer, namely the absorbing layer consists of two sub-layers, both the two sub-layers are a SiO2 and Cr2O3 film, and both the first sub-layer and the second sub-layer have the thickness of 50-100 nm; and a third layer namely the anti-reflection layer is a SiO2 film with the thickness of 40-80 nm. The coating provided by the invention has the characteristics of high absorption rate of visible-infrared spectroscopy and low emissivity of infrared spectroscopy; because of the reduction of metal atoms, the novel high-temperature selective absorbing coating with the double-ceramic structure has good thermal stability at medium and high temperature; and the preparation process of the coating is simple, is convenient to operate, is easy to control, and shortens the production cycle.

The invention discloses a day and night dual-effect radiation cooler and a preparation method thereof. The cooler is composed of a broad-spectrum strong-reflection metal substrate and a 8-14 [mu]m infrared strong-selectivity radiation coating smeared on the surface of the substrate, wherein the 8-14 [mu]m infrared strong-selectivity radiation coating consists of a visible-infrared transparent polymer and a 8-14 [mu]m infrared strong-selectivity radiation active nano functional composition, a mass content of the visible-infrared transparent polymer is 10%-80%, and the 8-14 [mu]m infrared strong-selectivity radiation active nano functional composition is composed of nano silica, a rare earth silicate compound and a molybdate compound according to a mass ratio of 1:(0.5-2):(0.5-2). The radiation cooler has excellent solar reflection and 8-14 [mu]m high radiation characteristics, so that the radiation cooler can exert an efficient self-cooling function under conditions of both sunlight irradiation and no sunlight irradiation, can be used for temperature-lowering and cooling with zero energy consumption of facilities and apparatuses such as buildings, grain and oil storage, high-power electronic equipment, and refrigerated bags, and has potential huge energy-saving effects.

The invention provides a method for preparing a carbon spot based photo-thermal conversion material in microcosmic hole channels of wood. According to the method, the wood is utilized as a porous carrier of the photo-thermal conversion material, and the carbon spot based photo-thermal conversion material can be prepared through 7 steps. When the photo-thermal conversion material prepared by the method disclosed by the invention is utilized, the performance of driving solar energy to evaporate water is superior to the performance of reported precious metal, semiconductor nanoparticles, carbon nano tubes and graphene type photo-thermal conversion materials; the photo-thermal conversion material can absorb light of the ultraviolet-visible-infrared whole solar spectrum; the photo-thermal conversion material has the advantages of repeatability and the like.