269 results about "Infrared wavelength" patented technology

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 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.

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.

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 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.

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.

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 glass prism optical path shifting device, comprising: at least one rhombus-shaped total reflection prism; at least one first trapezoidal structured glass; and a first air slot formed in the first trapezoidal structured glass and in contact with the rhombus-shaped total reflection prism. Light propagation undergoes one or more total internal reflections at the interface between the rhombus-shaped total reflection prism and air. The present invention relates to a glass prism optical path shifting device that operates properly in both the visible and infrared wavelengths.

The invention relates to a radio identification unit (1) with a radio identification receiver (2) and a proximity detector (3) connected to the radio identification receiver (2), wherein the proximity detector (3) has a pyroelectric PIR sensor (25) for detecting the approach of a person in the vicinity of the radio identification receiver (2) and is configured to activate the radio identification receiver (2) when a person's approach to the proximity detector (3) is detected. The PIR sensor (25) has two horizontally adjacent sensor elements (11a, 11b and / or 11c, 11d) with a sensor surface sensitive to infrared waves, which is covered by a cover (10) that is at least partially transparent to infrared wavelengths, wherein a vertical bridge (13) is located between the pair of sensor elements (11a, 11b and / or 11c, 11d).11a, 11d) is arranged in the space between the cover and a platform (12) of the PIR sensor (25) which supports the sensor elements (11a, 11b, 11c, 11d).

A vehicle window glass with which it is possible to realize a vehicle space that is favorable to the skin of the occupant is provided. In a vehicle window glass according to the present disclosure, an average transmittance A in a near-infrared wavelength band from 780 nm to 2,500 nm is 65% or less, a value B, which is a percentage (b1 / b2×100) of bl with respect to b2, is 50% or more, where b1 is an average transmittance in a visible-light long wavelength band of 650 nm to 750 nm, and b2 is an average transmittance in a visible-light total wavelength band of 380 nm to 780 nm, and the transmittance has a minimum value in the wavelength band of 500 nm to 600 nm.

A light emitting apparatus includes a first light emitting element and a second light emitting element disposed on a substrate, and a first lens and a second lens respectively disposed in correspondence with the first light emitting element and the second light emitting element. The first light emitting element has a first light emitting layer containing a chemical compound capable of emitting a light having a wavelength in an infrared range, and the second light emitting element has a second light emitting layer containing a chemical compound capable of emitting a light having a wavelength in a visible light range. The first light emitting element and the second light emitting element are configured to satisfy a specific relationship.

To solve the problem that in a low-reflection treatment, light absorption in a black porous layer is weakened in a region of wavelength of 700nm or more, so that reflectivity tends to increase as compared with a region of wavelength of 400 to 700 nm, therefore, when a sensor having sensitivity up to a wavelength region in a near infrared region is used, there is possibility that stray light is generated.SOLUTION: An optical member includes: a base material made of aluminum or an aluminum alloy; a first layer provided on the base material and made of black porous aluminum oxide; and a second layer provided on the first layer and made of aluminum oxide having a plurality of protrusions; and a third layer provided on the second layer and made of nickel or a nickel alloy.SELECTED DRAWING: Figure 5

Electronic device The present description relates to an electronic device (200) comprising: at least one first pixel (231, 232, 233, 234) having a monojunction; at least one second pixel (235) comprising a heterojunction, based on quantum dots; at least one first filter (122, 124, 126, 128) of a first color, allowing only the wavelengths of said first color and infrared to pass through, arranged vertically above the first pixel (231, 232, 233, 234), and at least partially above the second pixel (235); and an optical element (210) interposed between the first filter and the second pixel; the first filter (122, 124, 126, 128) and the optical element (210) being configured so that the first pixel (231, 232, 233, 234) receives wavelengths of said first color and the second pixel (235) receives only infrared wavelengths. Figure for the abbreviation: Fig. 4

A line-of-sight detection apparatus includes an acquisition unit configured to acquire an eyeball image, an irradiation unit configured to irradiate an eyeball with light in an infrared wavelength band, forming a plurality of point-shaped optical images on the eyeball image, and a calculation unit configured to calculate line-of-sight information based on the eyeball image and the plurality of point-shaped optical images, wherein the irradiation unit includes at least one single light source configured to emit the light in the infrared wavelength band, and a dividing element configured to divide the light emitted from the single light source into a plurality of beams of the emitted light to form the plurality of point-shaped optical images.

The present invention relates to the technical field of lidar, and more specifically, to a parallel FMCW lidar transmitting device and method in the mid- and far-infrared wavelength bands. The lidar transmitting device includes a laser, an electro-optic modulator, an arbitrary function generator, a chalcogenide chip, a diffraction grating, and an optical fiber link; the output port of the laser is connected to the light source input port of the electro-optic modulator, the waveform output port of the arbitrary function generator is connected to the microwave signal input port of the electro-optic modulator, and both ends of the chalcogenide chip are respectively connected to the optical signal output port of the electro-optic modulator and the diffraction grating through lens optical fibers. The present invention utilizes the cascaded four-wave mixing effect of the chalcogenide microcavity to convert a single FMCW into a mid- and far-infrared frequency comb light source, reducing the complexity of the linear frequency modulation narrow linewidth laser technology and greatly improving the transmission rate.

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.

The present invention provides a ferroelectric polymer-based all-organic composite material for photothermal and photoelectric conversion, a preparation method, and its application. Ultra-small conjugated poly-Schiff base poly-4-amino-1-naphthaldehyde nanoparticles are mixed with ferroelectric PVDF-based polymers by solution blending and casting to simply prepare a nanocomposite film. The polarized composite film can generate strong photothermal and photoelectric conversion in a wide range of ultraviolet-visible-near infrared wavelengths, such as 100mW / cm 2 The 450nm light can produce a temperature change of about 23℃, and achieve an open circuit voltage of 42.4V and a capacitance of 501.5μAm by coupling the photothermal effect with the pyroelectric effect. ‑2 The composite material's photoelectric voltage of over 40V is significantly higher than the current mainstream semiconductor-based photoelectric voltage (~1V), which may be more conducive to the material's application in fields such as energy conversion and light detection.