483 results about "Infrared wavelength" patented technology

The invention belongs to the technical field of camouflage materials, and particularly relates to a natural vegetation imitating visible light-laser-infrared compatible camouflage film. Comprising a substrate, a thermal infrared dual-band camouflage and near infrared spectrum regulation and control layer and a visible light-laser-near infrared regulation and control layer which are arranged in sequence. The upper-layer natural vegetation imitating structure is mainly used for simulating spectral characteristics of natural vegetation, and meanwhile, the extremely low reflectivity at the position of 1.06 mu m near-infrared laser wavelength is achieved by controlling the thickness of a film layer; the thermal infrared camouflage structure in the middle realizes low emissivity of medium-wave infrared and long-wave infrared; the substrate provides a bearing function. The multilayer film not only can realize refined simulation of a reflection spectrum of natural vegetation in a visible light-near infrared wavelength range, but also has the functions of adjusting different visible light spectrum colors and resisting an infrared detector and a 1.06 [mu] m laser detector; and a visible light-laser-infrared multi-band compatible camouflage performance covering a wide wavelength range of 0.4-14 microns can be realized.

Devices, apparatuses, and methods are disclosed that include a glass or glass ceramic substrate with a bleached region and an unbleached region. Examples include a substrate with a region that transmits IR wavelength light, and a region that is substantially opaque to IR light. Examples include additional opacity in some or all regions to visible wavelength light and / or UV wavelength light.

The present disclosure teaches an article of manufacture using an industrial (or commercial) manufacturing process. The article of manufacture comprises an infrared (IR) luminescent material that emits in the IR wavelength range (e.g., from approximately seven-hundred nanometers (˜700 nm) to approximately one millimeter (˜1 mm)) after being excited by incident wavelengths of between ˜100 nm and ˜750 nm (or visible light). In other words, once the material has been exposed to visible light, the material will continue to emit in the IR wavelength range for a period of time, even when the material is no longer exposed to the visible light.

The invention discloses a short pulse laser assisted continuous laser welding device and method. The method comprises the steps that materials are laid; a welding area is divided, and the whole welding area is divided into small areas; performing feature extraction on the small regions; constructing a speed mapping table according to the extracted different features; and planning a laser scanning path according to the speed mapping table. The short-pulse laser-assisted continuous laser welding device and method have the beneficial effects that near-infrared wavelength laser (such as 1064nm) is selected in the whole welding process, and the characteristics of high reflectivity of titanium alloy to the wavelength, high absorptivity of thermoplastic resin, relatively low absorptivity of a resin part in a thermosetting composite material and poor absorptivity of carbon fibers to the wavelength are utilized; laser energy is mainly concentrated on the thermoplastic resin layer, and local heating is achieved. The method comprises the following steps: dividing a region into small regions, extracting features, constructing a speed mapping table, controlling laser energy input, and reducing heat affected zones of the titanium alloy and the thermosetting composite material.

The invention provides a multispectral camouflage infrared wavelength selection thin film and a preparation method thereof, and belongs to the technical field of spectral thermal radiation management, and the preparation method comprises the following steps: screening a material with directional emission in a wave band of 8-14 microns as a directional emission layer material according to an optical constant of a thin film material in the wave band of 3-25 microns; a directional emission layer material is combined with a lossless dielectric material and a metal material to construct a cascaded Fabry-Perot resonant cavity structure; according to the arrangement sequence and the optical constant of each layer of film, taking the thickness of each layer of film as an optimization variable, and utilizing an optimization algorithm taking a quality factor function as a judgment basis to carry out iterative calculation to obtain the optimal thickness of each layer of film; and according to the structure of the multi-layer composite film and the optimal thickness of each layer of film, depositing each layer of film material on the substrate by adopting a magnetron sputtering process to prepare the multi-spectral camouflage infrared wavelength selection film. According to the scheme, the optimization efficiency of the film layer is improved, and efficient thermal management is realized while the multispectral camouflage performance is maintained.

The invention discloses an infrared polarized photoelectric detector based on a plasmon metasurface and a preparation method thereof, and belongs to the technical field of photoelectric detection. According to the photoelectric detector, coupling resonance is achieved through the bottom metal nano array and the WSe2 / InSe heterojunction, heterojunction infrared light absorption is enhanced, photocarriers are generated, and finally the photocarriers are collected by the top electrode layer to form photocurrent, so that the infrared light detection capacity of the original WSe2 / InSe heterojunction is improved. And optical absorption enhancement at different infrared wavelengths can be realized by adjusting the period, the length and the width of the metal nano array. When 4V bias voltage is applied, compared with an original WSe2 / InSe heterojunction photoelectric detector, the photoelectric responsivity of the photoelectric detector is improved by one order of magnitude, and the detection rate is improved by two orders of magnitude. In the aspect of polarization detection, the anisotropy of the nano array is utilized, and polarization insensitivity is creatively improved to the polarization ratio of 5.2.

Disclosed in the present invention is a near-infrared wavelength scanning pulse fiber laser having a low mode-locking threshold. According to the present invention, a nonlinear amplifying loop mirror and a saturable absorber mirror architecture are used to achieve a low mode-locking threshold and ensure long-term mode-locking stability. After mode-locking self-starting, an automatic control module automatically achieves single-pulse operation by adjusting the intensity of retro-reflected pulses. In the single-pulse operation stage, different frequencies of radio frequency signals and different signal intensities are provided for an acousto-optic tunable filter by means of a radio frequency module to achieve a 1030 nm-1100 nm wavelength scanning and tuning range.

An imaging system includes a light source emitting light at least a first excitation wavelength band to excite a first fluorescence material emitting a first fluorescence in a near-infrared wavelength band and light a second excitation wavelength band to excite a second fluorescence material emitting a second fluorescence in a visible wavelength band, a first image sensor receiving light including the first fluorescence and outputs a first imaging signal, a second image sensor receives light including the second fluorescence and output a second imaging signal, an optical element that separates the first fluorescence into a first optical branch and the second fluorescence into a second optical branch; and a pass filter in the first optical branch transmitting light having a near-infrared wavelength band and block light having a wavelength equal to or less than a predetermined wavelength belonging the visible wavelength band.

To provide heat-resistant materials that have excellent low thermal conductivity, high structural stability, and selective impermeability to infrared rays, a heat-shielding coating system and a method for manufacturing heat-resistant materials.SOLUTION: A heat-resistant material mainly composed of a rare-earth titanate represented by the general formula R2TiO5 (R is at least three types of rare-earth elements) utilizes excitation energy of at least one type of the rare-earth elements to absorb energy of light of specific wavelengths among the light contained in an infrared wavelength region.SELECTED DRAWING: Figure 8

The present invention relates to a device and a method for acquiring multi-luminosity images, wherein images having multiple luminosities in visible-ray and infrared wavelength domains can be captured and synthesized by using optical filter transmittance adjustment and infrared lighting strength adjustment. The device may comprise: a camera unit for photographing a predetermined subject and acquiring images thereof; a lighting unit disposed on the periphery of the camera unit, the lighting unit comprising a first infrared lamp for modulating and emitting infrared light according to the distance from the subject and a second infrared lamp for modulating and emitting infrared light according to the photography environment; an optical filter unit disposed on the front surface of the camera unit so as to adjust the amount of transmission of light directed to the camera unit; a lamp control unit for controlling the first infrared lamp such that infrared light is modulated on the basis of the distance from the subject; a luminosity multiplexing unit for producing a light multiplexing signal so as to control infrared light modulation by the second infrared lamp and the transmittance of the optical filter unit on the basis of the photography environment; and an image processing unit for synthesizing and processing multiple captured images.

A method of characterizing a device under test (DUT) includes illuminating the DUT with a broadband optical beam within an optical field of view (FOV), illuminating the DUT with an X-ray beam within an X-ray FOV overlapping the optical FOV, and concurrently acquiring X-ray metrology information, e.g., one or more X-ray images utilizing various modalities, such as absorption, phase contrast difference, darkfield, small angle X-ray scattering (SAXS) and / or fluorescence, from the X-ray FOV and a plurality of optical images of the optical FOV, each of the optical images corresponding to respective selected wavelengths of the broadband optical beam from each of ultraviolet, visible, and infrared wavelengths, for example including deep ultraviolet, near infrared, or short-wavelength infrared wavelengths. The DUT may be one or more substrates, e.g., stacked, and include electronic devices such as three-dimensional integrated devices.

An infrared imaging system includes a detector configured to detect a flame in a first infrared wavelength band and to detect a thermal image in a second infrared wavelength band, longer than the first infrared wavelength band; and an imaging circuit configured to output an image including the flame and the thermal image.

The invention discloses an infrared multi-channel gas detection method and a gas sensor, and the gas detection method mainly comprises the following steps: calibrating the infrared multi-channel gas sensor by using first to-be-detected gas, second to-be-detected gas and third to-be-detected gas; obtaining a fitting function of the concentration of each to-be-measured gas and the ratio absorptivity of each to-be-measured gas in the corresponding measurement channel and the reference channel, and a fitting function of the ratio absorptivity of each to-be-measured gas in the corresponding measurement channel and the reference channel and the interference absorptivity of each to-be-measured gas in other measurement channels; and performing interference correction on the to-be-measured gas of each measurement channel to obtain the real concentration of each to-be-measured gas. The infrared wavelength of the multi-component gas to be detected is designed through the characteristic that the black body light source can radiate a wider wavelength range, so that the cross interference among the components is reduced to the minimum, the interference among the component gases is further eliminated through an anti-interference detection method, and the detection precision of the component gas to be detected is improved.

The invention discloses a method for detecting the content of salidroside in a rhodiola rosea extracting solution based on artificial intelligence. The method comprises the following steps: S1, performing spectral scanning of different wavebands on an extracting solution sample in a plurality of near-infrared wavelength ranges; s2, performing multi-dimensional interference suppression processing and signal purification; s3, carrying out spectral feature compression calculation to obtain a salidroside feature intensity factor; s4, carrying out salidroside characteristic signal-to-noise ratio enhancement and purity index calculation; s5, predicting the content of salidroside and outputting a content prediction score; and S6, mapping the content prediction score into the final salidroside content. According to the method, spectral signal purification, nonlinear feature extraction, dynamic noise enhancement, artificial intelligence prediction modeling and a secondary recheck mechanism are utilized to realize adaptive analysis of extracting solutions from different sources, so that the detection accuracy and stability are remarkably improved, and rapid and traceable salidroside content detection can be realized under the condition that a large precise instrument is not needed.

The invention belongs to the technical field of photovoltaic cells, and particularly relates to a multi-element doped transparent conductive film and a preparation method and application thereof. The invention provides a preparation method of a multi-element doped transparent conductive film. The preparation method comprises the following steps: (1) pretreating a glass substrate; (2) growth of a TCO thin film: preparing an In2O3 target doped with Sn, W, Mo, Zr, Ti and Ga, and depositing the TCO thin film on the pretreated glass substrate by adopting a magnetron sputtering technology; and (3) carrying out annealing treatment on the TCO thin film. The multi-element doped transparent conductive film prepared by the method has relatively high electrochemical performance and transparency, the carrier mobility can reach 71.6 cm < 2 > V <-1 > s <-1 >, the resistivity can be as low as 2.7 * 10 <-4 > omega.cm, the average transmittance is greater than 80% in the visible light and near-infrared wavelength range of 400-2500nm, and the transmittance can still reach more than 80% in the near-infrared band.

Embodiments of the present disclosure include a photodiode that can detect optical radiation at a broad range of wavelengths. The photodiode can be used as a detector of a non-invasive sensor, which can be used for measuring physiological parameters of a monitored patient. The photodiode can be part of an integrated semiconductor structure that generates a detector signal responsive to optical radiation at both visible and infrared wavelengths incident on the photodiode. The photodiode can include a layer that forms part of an external surface of the photodiode, which is disposed to receive the optical radiation incident on the photodiode and pass the optical radiation to one or more other layers of the photodiode.

Optical spectrometers and polarization state hybrid sensors may be used to determine the spectral and polarization state components of electromagnetic waves. Hybrid sensors may be bulky devices and require waves to enter at a nearly direct angle of incidence to record a measurement. What is disclosed is an ultra-compact polarization state sensor with nanophotonic components. Nanophotonic components may contain metasurfaces and Bragg filters. Each metasurface may contain light scattering, anisotropic nanostructures that may be randomized to create a large input angle, and the Bragg filter may result in the light dispersion independent of the input angle. The sensor may be capable of handling about 200 nm bandwidth. The sensor may be able to read image data in the visible and to read spectral and polarization state data in the infrared wavelength range. The surface area of the sensor may be about 1 mm2, allowing it to fit on mobile devices.

An organic material comprises a structure such as Formula I:The structure contains polycyclic fused rings, diene groups, and naphthalene rings, which can effectively enhance the thermal stability of the material. The invention also provides an organic optoelectronic device comprising a first electrode, an active layer, and a second electrode. The active layer comprises the aforementioned organic material. This organic optoelectronic device exhibits great dark current density, detectivity, and photoelectric conversion efficiency in the near-infrared wavelength range, as well as superior thermal stability.

A head-mounted device may have left-eye and right-eye optical modules that may have a display that creates an image and a corresponding lens that provides the image to an eye box for viewing by a user. The optical modules each include a lens barrel to which the display and lens of that optical module are mounted and a head-mounted optical module gaze tracking system. The gaze tracking system may have light-emitting devices such as light-emitting diodes that emit light at a given near infrared wavelength and may operate through the lens and a removable supplemental lens. The supplemental lens may be a prescription lens and may have an antireflection portion that reduces the reflectance of the lens across visible and near infrared wavelengths. The antireflection portion may be a thin-film interference coating or a moth-eye portion. In this way, the gaze tracking system may operate through the removable supplemental lens.

To provide an imaging lens that maintains favorable optical performance by correcting various aberrations including chromatic aberration in the medium infrared wavelength range, and an imaging apparatus comprising the imaging lens.SOLUTION: An imaging lens includes a plurality of lenses and a stop. Assuming that a refractive index of each lens included in the imaging lens at a wavelength of 4000 nm is N4, at least one lens of the plurality of lenses is an LA lens that satisfies N4<1.5, and at least one lens of the plurality of lenses is an LB lens that satisfies 2<N4.SELECTED DRAWING: Figure 1

A multi-wavelength entangled photon pair generation device includes: a multi-mode pump laser that radiates a broadband pump laser beam in an ultraviolet wavelength range including multiple Gaussian-distributed wavelengths; a nonlinear crystal that generates a multi-wavelength de-multiplexed entangled photon pair in a near-infrared wavelength range including multiple wavelength components corresponding to multiple Gaussian-distributed wavelengths of the broadband pump laser beam, respectively; a temperature controller that adjusts a temperature of the nonlinear crystal; and an output optical system that filters out the broadband pump laser beam from light output through the nonlinear crystal and passes the multi-wavelength de-multiplexed entangled photon pair.

The present disclosure provides computer-implemented methods, systems, and devices for estimating the oxygen saturation levels of the blood of a user. A wearable computing device emits using one or more green light sources, light towards a skin of a user at a green wavelength. The wearable computing device further emits, using one or more red light sources, light towards a skin of a user at a red wavelength. The wearable computing device further emits, using one or more infrared light sources, light towards a skin of a user at an infrared wavelength. The wearable computing device further detects an intensity of green light, red light, and infrared light emitted from the skin of a user. The wearable computing device further determines an estimated oxygen saturation level.

Disclosed is an imaging system with image sensor and processor(s). The image sensor has a plurality of photo-sensitive cells and a colour filter array. The processor(s) is configured to read out unprocessed colour data from those photo-sensitive cells that correspond to the colour filters of the at least three different colours; generate coarse depth data by processing data read out from at least one of: those photo-sensitive cells that correspond to the colour filters that allow the at least one infrared wavelength to pass through the PDAF photo-sensitive cells; perform interpolation and demosaicking on the unprocessed colour data and the coarse depth data, using at least one neural network, to generate a full-resolution colour data and a full-resolution depth data; and reproject the full-resolution colour data from a given camera pose to a given eye pose of a user, by utilising the full-resolution depth data.

Systems and methods for endotracheal tube (ETT) placement confirmation and / or displacement monitoring includes an ETT that includes an optical fiber running substantially along a length of the ETT. The ETT has an insertion end and the optical fiber includes a tip proximate to the insertion end of the ETT. A source of near-infrared (NIR) wavelength light is operably connected to the optical fiber. A detection system is spaced apart from the ETT and the optical fiber. The detection system is configured for noninvasive detection of NIR wavelength light emitted from the optical fiber and diffused through the patient. A processor is communicatively connected to the detection system and configured to receive data from the detection system. The processor is configured to determine an initial position of the tip of the optical fiber and to continuously monitor subsequent position of the tip of the optical fiber.

The invention discloses an all-series recovery process for waste lithium ion batteries, which belongs to the field of lithium battery regeneration and comprises the main process steps of pretreatment of the waste lithium ion batteries, electrolyte recovery through microwave baking, obtaining of positive plates and negative plates through eddy current separation and separation of positive and negative black powder and metal foil through infrared irradiation. Wherein the electrolyte is recovered through microwave baking, so that the electrolyte can be quickly vaporized and then condensed and recovered under the action of microwaves by utilizing the strong polarity of the electrolyte, and therefore, the electrolyte can be efficiently separated, the removal effect is more thorough, and the problem of electrolyte pollution cannot be generated in the process. According to the infrared irradiation separation process, the absorption capacity of different adhesives to different infrared wavelengths can be utilized, and the molecular chains of the adhesives are broken and the positive and negative electrode powder and the metal foil can be automatically stripped by adjusting the irradiation infrared band and generating resonance vibration, so that the residues of the adhesives are greatly reduced; the recovery rate of the waste lithium ion battery and the purity of the recovered material are improved.

A head-mounted device may have left-eye and right-eye optical modules that may have a display that creates an image and a corresponding lens that provides the image to an eye box for viewing by a user. The optical modules each include a lens barrel to which the display and lens of that optical module are mounted and a head-mounted optical module gaze tracking system. The gaze tracking system may have light-emitting devices such as light-emitting diodes that emit light at a given near infrared wavelength and may operate through the lens and a removable supplemental lens. The supplemental lens may be a prescription lens and may have an antireflection portion that reduces the reflectance of the lens across visible and near infrared wavelengths. The antireflection portion may be a thin-film interference coating or a moth-eye portion. In this way, the gaze tracking system may operate through the removable supplemental lens.

The present disclosure relates to an intraoral scanning system for providing enhanced internal structure information of teeth by determining a composed scan information. The intraoral scanning system may be configured to provide a composed scan data based on captured visible light information and internal light information. The system may include a handheld intraoral scanning device that includes a projector unit configured to emit light with different wavelengths during time periods onto at least a dental arch, wherein the different wavelengths include at least a near-infrared wavelength and at least a visible wavelength. The handheld intraoral scanning device may further include an image sensor unit configured to capture visible light information and internal light information from at least the dental arch caused by the emitted light at the different wavelengths. The system may further comprise one or more processors operably connected to the image sensor unit, the one or more processors is configured to receive the visible light information and the internal light information, determine, in real time, surface information from the visible light information for generating or updating a three-dimensional (3D) model of the dental arch using the surface information, determine internal structure information of the dental arch from the internal light information, and determine composed scan information including a composition of the internal structure information and the visible light information.

The invention discloses a surface plasmon resonance radiation cooling-heat conduction-liquid film evaporation coupling heat dissipation multi-layer co-construction micro-nano structure and a manufacturing method and application thereof, and belongs to the technical field of micro-nano manufacturing and functional structure surfaces, and the multi-layer co-construction micro-nano structure is composed of three layers of structures; the bottom layer structure is a substrate; the top of the bottom layer structure is a near-infrared wavelength scale grating structure; the middle-layer structure is a high-thermal-conductivity diamond film and covers and fills the bottom-layer structure; the top of the middle-layer structure is of a lyophilic micro-nano structure; the top layer structure is a silicon dioxide film. Radiation cooling, efficient heat conduction and liquid film evaporation / boiling phase change heat transfer are coupled, the heat transfer and heat dissipation level is greatly improved, additional external energy input is not needed, and positive significance is achieved for research and development of a novel high-performance and zero-energy-consumption radiator, promotion of development of a high-heat-flow-density advanced system and improvement of the ecological environment.

Camouflage coating systems, apparatuses, and methods described herein may include a coating deposited and bonded to a region of an external surface of an object to be camouflaged. The coating may include a plurality of stacked material arrangements deposited and bonded sequentially onto the region of the external surface and arranged to define a laterally distributed plurality of independent camouflage profiles. The coating may be configured to adjust coating emissivity at visual and IR wavelengths and to block or adjust infrared (IR) emitted by the object, thereby concealing the region of the external surface of the object from detection by a detection method in the visual, infrared, and electromagnetic regimes.

This infrared radiation detector comprises: – a cryostat equipped with a cold finger, suitable for heat exchange with a cold source, and a window transparent to the infrared radiation to be detected; – a cold plate, mechanically fixed and in heat exchange with the cold finger; – a detection block comprising at least one detection matrix sensitive to the range of infrared wavelengths to be detected, and in heat exchange directly or indirectly with the cold plate; – a cold screen mechanically fixed and in heat exchange with the cold plate and suitable for limiting parasitic radiation, the cold screen being equipped with at least one diaphragm or baffle (9), oriented radially with respect to the general orientation of the detector, and equipped with an opening suitable for allowing the transit of the optical path resulting from the incident radiation.The free edge (13) of said at least one diaphragm or baffle (9) is structured so as to define non-linear patterns (14). Figure for the abbreviation: Fig 6.