31 results about "Infrared wavelength" patented technology

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.

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 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 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.

This invention discloses an activated water treatment device and method, comprising a water tank, a circulating pump, a jet mixer, and a far-infrared irradiation tube. Upon starting the circulating pump, the water to be treated in the tank is pressurized by the pump to form a high-speed water flow. This high-speed water flow flows from the inlet section to the mixing section. As the high-speed water flow passes through the venturi-structured mixing section, a negative pressure is created. Under this negative pressure, outside air is drawn into the mixing section through the air intake structure, air inlet, and air outlet, where it is fully sheared, collided, and mixed with the high-speed water flow, forming a gas-liquid mixture rich in microbubbles. This gas-liquid mixture is discharged from the outlet section to the far-infrared irradiation tube. The far-infrared emitting material layer emits far-infrared wavelengths in the range of 4-16 μm. This far-infrared wavelength can effectively penetrate the water and microbubbles in the gas-liquid mixture, acting on water molecules, breaking the hydrogen bonds between water molecules, and altering the arrangement of water molecules, thereby enhancing the activity of the water.

An optical film includes a plurality of first layers disposed on a plurality of second layers. For each angle of incidence in an incident angle range of 0-50 degrees, an optical transmittance of each of the optical film and the plurality of second layers versus wavelength includes a band edge disposed in a transition wavelength range separating a visible wavelength range where the optical film and the plurality of second layers have respective average optical transmittances Tv and Tv2 from an infrared wavelength range where the optical film and the plurality of second layers have respective average optical transmittances Ti and Ti2. Each of Tv and Tv2 is greater than about 30%. An average value of Tv2 is greater than an average value of Tv by at least 5%. An average value of Ti is less than an average value of Ti2 by at least 20%.

An ab externo automated laser treatment system for treating an eye in a subject, includes a non-contact laser source configured to generate a laser beam having at least one wavelength to treat the eye by directing the laser beam from a location spaced from the eye, wherein the at least one wavelength is a near-infrared wavelength in the range of about 0.5-2.2 μm, a laser scanner optically coupled to the non-contact laser source to receive the laser beam from the non-contact laser source and to scan the laser beam relative to the eye, and a processor, and memory including stored computer-readable instructions that, responsive to execution by the processor, cause the laser treatment system to direct the laser beam to a plurality of trans-scleral treatment locations to be irradiated in a predetermined treatment pattern on an external surface of the eye, wherein the trans-scleral treatment locations are 0-4 mm posterior to the corneolimbal junction, and wherein the laser beam is repetitively directed to the same irradiated trans-scleral treatment locations on the surface of the eye, and the trans-scleral treatment locations are irradiated at intervals sufficient to induce protective thermal preconditioning and therapeutic bio-stimulation of one or more of the trabecular meshwork and / or ciliary body without photocoagulation of the tissue of the eye. Trans-pupillary systems, patient interfaces, and methods are also disclosed.

High P2O5 copper-containing near-infrared absorbing glass compositions, articles comprising the glass compositions, methods of making the glass compositions, and methods of using the glass compositions are provided. Such glass compositions include, in mole percent on an oxide basis and fluorine content: P2O5: 45-70; SiO2: 2-30; Al2O3: 4-12; Li2O: 0-5.1; K2O: 0.3-10; ZnO: 0-20; SrO: 0-7.4; CuO: 5-16; Sb2O3: 0-4; CeO2: 0-2; total fluorine (F): 0-35. The combined concentration of RO is in the range of 0 to 23.4, and the combined concentration of R'2O is in the range of 0.3 to 14.3. RO is selected from the group consisting of MgO, CaO, SrO, BaO, and ZnO, and R'2O is selected from the group consisting of Li2O, Na2O, and K2O. The glass compositions have a red-shifted cutoff wavelength and good visible light transmission and good absorbance in the near-infrared wavelength range, and are suitable for use as optical filters for cameras.

To provide an anti-reflective material having high light transmittance in the near-infrared wavelength range (800-2500 nm). [Solution] The system comprises a resin substrate and a particle layer made of mesoporous silica nanoparticles arranged on the surface of the resin substrate. Some of the aforementioned nanoparticles are directly immobilized on the surface of the resin substrate, and At least a portion of the nanoparticles directly immobilized on the surface of the resin substrate are embedded in the surface of the resin substrate. The aforementioned nanoparticles are arranged in two or more layers to form the particle layer, The thickness of the particle layer is 2 to 10 times the average particle diameter of the nanoparticles. The area occupied by the particle layer made of nanoparticles is 95% or more of the total surface area of ​​the resin substrate. An anti-reflective member characterized by the following features.

A flushing system configured to flush a wound and / or a body cavity of a patient comprises: an infusion liquid outlet to connect a first tube guiding a flow of infusion liquid from the system to the wound and / or the body cavity; an effusion liquid inlet to connect to a second tube guiding the effusion liquid flow from the wound and / or the body cavity to the system; a flow rate control system to control the flow rate at the infusion liquid outlet; and a hematocrit sensor configured to optically measure the hematocrit value of the effusion liquid received via the effusion liquid inlet, to obtain a blood loss volume and / or a blood loss flow rate from the wound and / or the body cavity by means of emitting light having different wavelengths. The different wavelengths are respectively assigned to the green wavelength range and to the red or near-infrared wavelength range.

The present application belongs to the technical field of optical film design, and relates to a high-reflection / high-transmission film design method based on optical interference and mathematical optimization. The method comprises the following steps: obtaining the material combination, layer number and thickness of each layer of a film system; based on the principle of optical interference, the transfer matrix method or the Fresnel coefficient recursive formula is used to calculate the theoretical transmittance and reflectance of the current film system at different wavelengths, and an evaluation function for quantifying the difference between the spectral performance of the film system and the preset spectral performance index is constructed; taking the minimization of the evaluation function as the target, the gradient descent method or the genetic algorithm is used to optimize the material combination, layer number and thickness of each layer of the film system until the film system parameters satisfying the spectral performance index are obtained. The present application can efficiently obtain a selective film with high transmittance in the response wavelength band of a photovoltaic cell and high reflectance in the infrared wavelength band, thereby significantly improving the photovoltaic power generation efficiency and reducing the thermal load of the component.

This application provides a gas detection system and method based on near-infrared wavelength modulation and mid-infrared pulsed laser synergy, relating to the fields of spectroscopic gas detection and industrial flue gas monitoring. In industrial sites such as biomass power plants, hazardous waste incineration plants, and aluminum smelters, the flue gas generated in their flues has complex compositions. Traditional chemical detection methods are insufficient to meet real-time requirements, while other optical detection methods, such as Fourier transform infrared spectroscopy and ultraviolet differential spectroscopy, suffer from high costs and difficulty in avoiding water vapor interference. To address this, a system and method for detecting the concentration of gaseous pollutants in industrial flue gas based on near-infrared wavelength modulation and mid-infrared pulsed laser synergy is proposed. This system combines near-infrared wavelength modulation spectroscopy with mid-infrared pulsed direct absorption spectroscopy, employing multiple near-infrared tunable continuous lasers and mid-infrared tunable pulsed lasers. It utilizes time-division multiplexing and polling modes, combined with a common optical path design, to achieve real-time online monitoring of the concentration of various gaseous pollutants, ultimately significantly reducing the overall system cost.

A top-down inspection system and method employs a strategy using specific geometric shaped metal alignment markers on a semiconductor die and a laminate that can be inspected using an IR camera. The metal alignment markers will align at room temperature to assess the die alignment prior to reflowing it. As silicon is transparent to IR wavelengths the system allows for the IR light to pass through the die to the laminate to see alignment features on the die and the laminate concurrently. The specific markers are placed in at least two separate locations preferably >0.5*die size apart. The robust alignment markers are substantially resistant to degradation caused by semiconductor device fabrication steps. The metal alignment markers can be small geometrical shapes to provide a more symmetrical signal which is more resistant to variability in prior processing steps than the standard marker design.

This invention provides a semiconductor structure and its detection method, belonging to the semiconductor field. The detection method for this semiconductor structure includes forming a trench on a first side of a substrate; depositing a metal layer in the trench; and irradiating the trench from a second side of the substrate with infrared light of a set wavelength to determine whether there are residues in the trench. By forming a metal layer in the trench and using infrared light of a set wavelength, when the substrate is irradiated from the second side, the metal layer cannot be formed on the back side of the residue. Therefore, the residue cannot be imaged when the substrate is irradiated from the second side. During infrared imaging, there is a grayscale difference in the image at the location of the residue, thus enabling the determination of whether there are residues in the trench. This method can promptly detect whether there are residues in the trench, thereby enabling timely compensation for detection defects, shortening the detection time, and further reducing detection costs.

This invention discloses an electrically programmable mercury cadmium telluride (HgCd) wavelength-selective detector based on a spatial bandgap gradient. The Hg / Cd composition of the absorption layer varies with thickness, allowing the bandgap to be adjusted with depth. Deeper layers have a larger bandgap, absorbing only shorter wavelengths; shallower layers have a smaller bandgap, preferentially absorbing longer infrared wavelengths. By adjusting the applied bias voltage, the positions of the depletion and multiplication regions within the absorption region can be controlled in real time, enabling programmable extraction of photocurrents at different wavelengths within a single-image device. Compared to traditional spectral systems relying on mechanical dispersive or filter arrays, this invention features a compact structure, requires no mechanical components, and offers advantages such as high-speed response and array-based design.

Light-emitting diode module, LED module, which is configured to emit white light, wherein the LED module has: a blue light-emitting diode (30) configured to emit blue light with a first peak wavelength in a range of 420 nm to 465 nm; at least one wavelength conversion material (54, 56) configured to convert part of the blue light into converted light of another wavelength; and a near-infrared wavelength conversion material (58) configured to be excited by the blue light of the blue light-emitting diode (30) to emit an additional light with a second peak wavelength in a range of 740 nm to 900 nm and a full width at half maximum (FWHM) of 120 nm or less, wherein the near-infrared wavelength conversion material (58) Ca(Al 12-x-y ,Ga y )O 19 :xCr 3+ (0≤x≤1, 0≤y≤6) exhibits, where the converted light, another part of the blue light, and the additional light combine to form the white light, and wherein a spectrum of the white light thus formed has a peak intensity in the range of 740 nm to 900 nm, and the peak intensity is greater than or equal to 4.5% of a peak intensity in a blue band from 420 nm to 465 nm.

A reflective polarizer includes a plurality of first layers disposed on a plurality of polymeric second layers. Each of at least 30% of the first layers includes at least 30% by weight of an inorganic material. For an incident light incident in a plane and a first incident angle, the reflective polarizer and the first layers have respective average optical reflectances R3v and R1v in a visible wavelength range and respective average optical reflectances R3ir and R1ir in an infrared wavelength range, R1v<R3v and (R1ir−R3ir)>10%, when the incident light is polarized along a first direction; and for the visible wavelength range and for a second incident angle, the plurality of polymeric second layers has an average optical reflectance R2v(x) when the plane includes the first direction and an average optical reflectance R2v(y) when the plane includes a second direction, 5% <R2v(y)<R2v(x)<60%.

The application belongs to the field of tumor photodynamic therapy, and discloses a curcumin photosensitizer and a preparation method and application thereof, and particularly relates to a curcumin compound shown in the following general formula (I). The compound has near-infrared wavelength light emitting properties, can generate active oxygen to kill tumor cells under light conditions, has almost no toxicity under dark conditions, can significantly reduce toxic side effects, and has good application potential in the field of imaging guided photodynamic therapy.

A system and method that may enable the generation of highly-efficient, high-power, narrow-linewidth, and tunable light sources from microwave frequencies to mid-infrared wavelengths is disclosed. The light source comprises a nonlinear medium coupled to a multi-modal cavity and a high-energy pump source. The nonlinear medium provides three-wave mixing between modes present in the cavity to generate, for example, terahertz waves. The broadband cavity enables cascading nonlinear processes. By engineering the Q-factors of the cavity's many modes, red-shifted (stokes) cascaded nonlinear processes strongly dominate over their blue-shifted (anti-stokes) counterparts, resulting in a quasi-complete depletion of the pump energy into the THz mode.

This invention discloses an online refined oil detection system, including a detection base, an incident light probe, an outgoing light probe, a refined oil flow module, a reference oil flow module, a spectrometer, and a light source module. When the reference oil flow module is activated, reference refined oil is discharged after passing through a second hole, a first hole, and a fourth hole; when the refined oil flow module is activated, refined oil is discharged after passing through a first hole. The light source module emits near-infrared wavelength light. The incident light probe receives light and generates reference transmitted light that passes through the reference refined oil when the reference oil flow module is activated, and generates actual transmitted light that passes through the refined oil when the refined oil flow module is activated. The outgoing light probe receives and transmits the actual transmitted light and the reference transmitted light. The spectrometer receives the actual transmitted light and the reference transmitted light, and determines the quality evaluation parameters of the refined oil based on the light signals of the actual transmitted light and the reference transmitted light. Using the above system, the determination of the quality evaluation parameters of refined oil is realized.

The present disclosure provides a compact fingerprint and finger vein combined scanner comprising a cemented prism pair (1') with first prism block (3) and second prism block (2), selective interference coating (7) between the prism blocks that transmits red wavelength light and reflects near-infrared wavelength light at different incidence angles, red LED (4) illuminating finger placement surface (6) on the first prism block (3), at least one near-infrared LED (5) illuminating the finger placement surface (6), imaging lens system (8) comprising First imaging lens (8a) and Second imaging lens (8b) arranged in sequence receiving light from the cemented prism pair (1'), aperture filter (9) between the imaging lens system (8) and imaging detector (10) with wavelength-selective filter transmitting red wavelength light and absorbing near-infrared wavelength light and central opening transmitting both wavelengths, and two-dimensional imaging detector (10) receiving light through the imaging lens system (8) and aperture filter (9).

Described herein is a vehicle monitoring camera (100) for monitoring an interior of a vehicle (200). The camera (100) comprises a substrate (102) configured to house electronic components. At least one light source (104) is mounted to the substrate (102) and configured to emit light in the infrared wavelength range onto a scene within the vehicle (200). An image sensor (106) is mounted to the substrate (102) and comprises a two dimensional array of sensing elements configured to sense light in at least the infrared wavelength range from the scene. An imaging metasurface (108) is mounted onto or in front of the image sensor (106) and has surface properties configured to define a wide field of view of light received at the image sensor (106) and to focus light onto the image sensor (106) to capture images of the scene.

This invention discloses a photodetector and its fabrication method. The photodetector includes: a substrate; a first groove formed on the substrate; a first conductivity type doped region and a second conductivity type doped region, spaced apart on one side of the substrate; the first and second conductivity type doped regions are respectively formed within the substrate on both sides of the first groove; a wavelength extension region located within the first groove; the wavelength extension region includes bandgap elements, the content of which is related to the upper limit of the infrared wavelength of the photodetector's response; a first electrode and a second electrode, the first electrode being located on the side of the first conductivity type doped region away from the substrate and in contact with the first conductivity type doped region; the second electrode being located on the side of the second conductivity type doped region away from the substrate and in contact with the second conductivity type doped region. This invention can extend the response wavelength of the device.

Copper-containing near-infrared absorbing glass compositions, articles comprising the glass compositions, methods of making the glass compositions, and methods of using the glass compositions are provided. Such glass compositions include, in mole percent on an oxide basis and fluorine content: P2O5: 30-40; SiO2: 0-10; K2O: 0-15; ZnO: 15-40; CaO: 0-12; SrO: 0-20; MgO: 0-10; BaO: 0-12; CuO: 4-18; Al2O3: 1-7; Li2O: 1-20; Na2O: 0-10; Sb2O3: 0-5: and total fluorine (F): 1-60. The combined concentration of RO is in the range of 20 to 40, and the combined concentration of R'2O is in the range of 2 to 18. RO is selected from the group consisting of MgO, CaO, SrO, BaO, and ZnO, and R'2O is selected from the group consisting of Li2O, Na2O, and K2O. The glass compositions have a red-shifted cutoff wavelength and good visible light transmission and good absorbance in the near-infrared wavelength range, and are suitable for use as optical filters for cameras.

The present disclosure provides a mid-infrared thermal emitter comprising a phononic substrate, a dielectric layer bonded to the phononic substrate with a periodic grating structure formed thereon, and a membrane heater integrated with the phononic substrate. The thermal emitter is configured to produce narrowband coherent emission in the mid-infrared wavelength range between 10 micrometers and 12 micrometers with a quality factor greater than 100. The disclosure also provides a method of fabricating a coherent light-emitting metasurface for mid-infrared applications by creating a composite structure through forming a bonded interface between a dielectric layer and a phononic substrate, thinning the composite structure to a desired thickness, and forming periodic grating patterns in the dielectric layer to create a metasurface supporting off-gamma point Friedrich-Wintgen bound states in the continuum for coherent light emission in a wavelength range between 3 micrometers and 50 micrometers.

This invention discloses a mid-to-far-infrared narrowband light source for MEMS, comprising a substrate, a suspension support layer, a heating resistor layer, and a radiation functional layer. The substrate is a silicon substrate. The suspension support layer is fixed to the substrate by anchor points. The heating resistor layer is disposed on the suspension support layer, and the radiation functional layer is disposed above the heating resistor layer. The suspension support layer and the heating resistor layer have Y-shaped grooves forming a Y-beam suspension structure. The Y-beam suspension structure is connected to the substrate by anchor points to form thermal isolation. The surface of the radiation functional layer has a periodically arranged array of micro / nano structures. The period and size of the micro / nano structure array are on the same order of magnitude as the target infrared wavelength, forming an artificial interface with specific equivalent refractive index and resonance characteristics to achieve narrowband spectral output. This invention can reduce heat conduction from the radiation region to the substrate, reduce heat conduction loss, reduce heat leakage, improve thermal isolation performance, and reduce heat capacity, thereby enabling the beam to heat up and cool down rapidly.