353 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.

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.

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.

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.

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 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.

The present disclosure relates to an intraoral scanning system configured to determine a three-dimensional surface model and a plurality of focus images. The intraoral scanning system comprises: a projector unit configured to emit light onto a dental object, wherein the emitted light comprises an infrared wavelength and a structured light, the structured light comprising a first visible wavelength; a first image sensor unit comprising: a first image sensor configured to acquire first reflected light from the dental object, wherein the first reflected light comprises the infrared wavelength, and wherein the first image sensor comprises a pixel array, a microlens array arranged in front of the pixel array and configured to transmit the first reflected light to the pixel array, wherein one or more microlenses of the microlens array direct the first reflected light to one or more pixels of the pixel array; a second image sensor unit comprising: a second image sensor configured to acquire second reflected light from the dental object, wherein the second reflected light comprises the structured light; a processor unit configured to: determine three-dimensional (3D) data of the dental object based on the second reflected light, determine a three-dimensional (3D) surface model of the dental object by merging the 3D data, and determine a plurality of focus images at different focus depths into the dental object by selecting a set of pixels from the pixel array associated with each microlens of the microlens array, and wherein the processor unit is configured to align a position of each focus image of the plurality of focus images to a position in the 3D surface model based on the 3D data.

A measurement system for use in optical metrology, the measurement system which includes a control system configured and operable to carry out the following: (i) receive raw measured data generated by a measurement unit that is configured and operable for performing normal-incidence spectral interferometric measurements on a sample and generating the raw measured data indicative of spectral interferometric signals measured on the sample for a number of different optical path differences (OPDs) between sample and reference arms using infrared wavelengths; (ii) extract, from the raw measured data, a portion of spectral interferometric signals describing variation of signal intensity with a change of an optical path difference OPD during interferometric measurements, said portion of the spectral interferometric signals being independent of interferometric signals returned from a bottom portion of the sample in response to said illuminating electromagnetic field; and (iii) directly determine, from the extracted portion of the spectral interferometric signals, both spectral amplitude and phase of reflection of the illuminating electromagnetic field from the top portion of the sample, thereby enabling to determine a measured spectral signature characterizing the top portion of the sample.

The present application relates to an apparatus and a vehicle comprising such an apparatus. The device comprises a display device (1) and a camera (3). A display device (1) is provided with a cover glass (7), an LCD panel (2), and a backlight unit. The LCD panel (2) is arranged behind the cover glass (7), the backlight unit is arranged behind the LCD panel (2), and the camera (3) is arranged behind the backlight unit, the field of view of which is directed towards the backlight unit. The field of view of the camera (3) defines an effective area (9) of the camera (3). The backlight unit comprises an edge light source (8) and a light guide (5). The camera (3) operates in the infrared wavelength spectrum, and the light guide (5) is a light guide (5) having a nanostructure (12).

An optically diffusive film includes an optical substrate layer with opposing first and second major surfaces; and an optical layer disposed on the second major surface of the optical substrate layer and including a structured major surface having a plurality of spaced apart elongated structures elongated along a same first direction and arranged at a substantially uniform density, each elongated structure including a peak such that, in a plane of a cross-section of the elongated structure that is parallel to the first direction and comprises the peak, the elongated structure has a substantially flat top region; wherein for substantially normally incident light and a visible wavelength range and an infrared wavelength range, the optical substrate layer has an average total transmittance or reflectance of greater than about 60% in the visible wavelength range and an average specular transmittance of greater than about 60% in the infrared wavelength range.

A floor type detection system for a floor cleaner, wherein the floor type detection system comprises one or more light emitters, a light sensor configured to detect light having infrared wavelengths i

A light emitting apparatus includes a display region and an infrared light emitting region on a substrate. A plurality of display light emitting elements is disposed in the display region. A plurality of infrared light emitting elements is disposed in the infrared light emitting region. In a plan view of the substrate, the display region and the infrared light emitting region are in a positional relationship not overlapping each other. Each of the display light emitting element and the infrared light emitting element is made by laminating a lower electrode, a functional layer including a light emitting layer, and an upper electrode in this order from the substrate side. A reflectance of the upper electrode of the infrared light emitting element at an infrared wavelength is higher than a reflectance of the upper electrode of the display light emitting element at the infrared wavelength.

An optical filter has an average optical transmission of greater than about 50% in a visible wavelength range (e.g., wavelengths from about 420 nm to about 550 nm) and an optical density greater than about 1.5 in an infrared wavelength range (e.g., wavelengths from about 650 nm to about 800 nm). The optical filter can have a sharp band edge between the visible and infrared ranges. For example, a change in percent transmission of at least about 30% can occur over a wavelength range not greater than about 10 nm wide and / or the slope of the band edge can be greater than about 5% / nm. An optical system includes the optical filter disposed between an emissive display and an optical sensor.

A therapeutic covering for a horse having a mesh material that is infused with ceramic mineral powder (emitting far-infrared wavelengths) and magnets coupled to the mesh material. The mesh material can have a mesh size that provides therapeutic effect, is breathable, and is bug resistant.

The present invention relates to a method for determining the concentration of an analyte in a sample obtained from a treated blood-derived plasma, the method comprising applying a light source in near infrared spectroscopy to a test sample obtained from a treated blood-derived plasma; the reflectance, transmittance, or translucency of the test sample in the range of near infrared wavelengths is measured to produce a test wavelength spectrum, which is compared to a reference wavelength spectrum obtained from a reference sample having a known concentration of the analyte to determine the concentration of the analyte in the sample. The invention also relates to the development of a multivariable model for determining the concentration of an analyte, such as total protein or alcohol, such as ethanol.