3810 results about "Near infra red" patented technology

An exemplary system, method and computer-accessible medium for determining resultant information about a portion(s) of a tissue(s), can include, for example, receiving initial information which is based on a particular radiation that is returned from the portion(s), the particular radiation can be is based solely on an interaction between the portion(s) and a near-infrared radiation forwarded to the portion(s), and determining the resultant information about the portion(s) of the tissue(s) based on the initial information. The near-infrared radiation can be provided by a near-infrared light optical arrangement that can include a diffusely reflected near-infrared light arrangement. A depth of a lesion to be ablated can be determined by the near-infrared radiation based on the initial information. The initial information can include data corresponding to a reflectance spectrum(s) of the portion(s).

A method and apparatus for non-invasively determining the blood oxygen saturation level within a subject's tissue is provided that utilizes a near infrared spectrophotometric (NIRS) sensor capable of transmitting a light signal into the tissue of a subject and sensing the light signal once it has passed through the transmitting a light signal into the subject's tissue, wherein the transmitted light signal includes a first wavelength, a second wavelength, and a third wavelength; (2) sensing a first intensity and a second intensity of the light signal, along the first, second, and third wavelengths after the light signal travels through the subject at a first and second predetermined distance; (3) determining an attenuation of the light signal for each of the first, second, and third wavelengths using the sensed first intensity and sensed second intensity of the first, second, and third wavelengths; (4) determining a difference in attenuation of the light signal between the first wavelength and the second wavelength, and between the first wavelength and the third wavelength; and (5) determining the blood oxygen saturation level within the subject's tissue using the difference in attenuation between the first wavelength and the second wavelength, and the difference in attenuation between the first wavelength and the third wavelength.

A system mountable in a motor vehicle. The system includes a camera and a processor configured to receive image data from the camera. The camera includes a rolling shutter configured to capture the image data during a frame period and to scan and to read the image data into multiple image frames. A near infra-red illuminator may be configured to provide a near infra-red illumination cone in the field of view of the camera. The near infrared illumination oscillates with an illumination period. A synchronization mechanism may be configured to synchronize the illumination period to the frame period of the rolling shutter. The frame period may be selected so that the synchronization mechanism provides a spatial profile of the near infra-red illumination cone which may be substantially aligned vertically to a specific region, e.g. near the center of the image frame.

In a film or panel having excellent near-infrared absorbability and excellent near-infrared shieldability, and having a high degree of visible ray transmittance and good color tone, in order to produce the near-infrared-absorbing film or panel having good color tone while the near-infrared-absorbing dye disposed therein is kept stable, the dye and the binder resin for the dye are specifically selected, and the production method is also specifically selected. In addition, for the purpose of producing the film or panel while the dye disposed therein is kept stable and for the purpose of making the film or panel have additional functions such as electromagnetic radiation absorbability, the film or panel is made to have a multi-layered structure.

Methods and apparatus for measuring cerebral O₂ saturation and detecting cerebral hypoxia-ischemia using multi-wavelength near infrared spectroscopy (NIRS). Near-infrared light produced by an emitter is directed through brain tissue. The intensity of the light that passes through the brain tissue is measured using photodiode detectors positioned at distinct distances from the emitter. This process is conducted for at least three wavelengths of near-infrared light. One of the wavelengths used is substantially at an isobestic point for oxy-hemoglobin and deoxy-hemoglobin, but the other two may be any wavelengths within the near-infrared spectrum (700 nm to 900 nm), so long as one of the additional wavelengths is greater than the isobestic point and the other is less than the isobestic point. Tissue oxygenation is calculated using an algorithm derived from the Beer-Lambert law. Cerebral hypoxia-ischemia may be diagnosed using the calculated tissue oxygenation value.

This disclosure is of 1) the utilization of the spectrum from 250 nm to 1150 nm for measurement of prediction of one or more parameters, e.g., brix, firmness, acidity, density, pH, color and external and internal defects and disorders including, for example, surface and subsurface braises, scarring, sun scald, punctures, in N—H, C—H and O—H samples including fruit; 2) an apparatus and method of detecting emitted light from samples exposed to the above spectrum in at least one spectrum range and, in the preferred embodiment, in at least two spectrum ranges of 250 to 499 nm and 500 nm; 3) the use of the chlorophyl band, peaking at 690 nm, in combination with the spectrum from 700 nm and above to predict one or more of the above parameters; 4) the use of the visible pigment region, including xanthophyll, from approximately 250 nm to 499 nm and anthocyanin from approximately 500 to 550 nm, in combination with the chlorophyl band and the spectrum from 700 nm and above to predict the all of the above parameters.

A method for the evaluation of target media parameters in the visible and near infrared is disclosed. The apparatus comprises a light source, an illuminator/collector, optional illumination wavelength selector, an optional light gating processor, an imager, detected wavelength selector, controller, analyzer and a display unit. The apparatus illuminates an in situ sample of the target media in the visible through near infrared spectral region using multiple wavelengths and gated light. The sample absorbs some of the light while a large portion of the light is diffusely scattered within the sample. Scattering disperses the light in all directions. A fraction of the deeply penetrating scattered light exits the sample and may be detected in an imaging fashion using wavelength selection and an optical imaging system. The method extends the dynamic range of the optical imager by extracting additional information from the detected light that is used to provide reconstructed contrast of smaller concentrations of chromophores. The light detected from tissue contains unique spectral information related to various components of the tissue. Using a reiterative calibration method, the acquired spectra and images are analyzed and displayed in near real time in such a manner as to characterize functional and structural information of the target tissue.

This invention relates to a front electrode/contact for use in an electronic device such as a photovoltaic device. In certain example embodiments, the front electrode of a photovoltaic device or the like includes a multilayer coating including at least one transparent conductive oxide (TCO) layer (e.g., of or including a material such as tin oxide, ITO, zinc oxide, or the like) and/or at least one conductive substantially metallic IR reflecting layer (e.g., based on silver, gold, or the like). In certain example instances, the multilayer front electrode coating may include one or more conductive metal(s) oxide layer(s) and one or more conductive substantially metallic IR reflecting layer(s) in order to provide for reduced visible light reflection, increased conductivity, cheaper manufacturability, and/or increased infrared (IR) reflection capability. In certain example embodiments, the front electrode acts as not only a transparent conductive front contact/electrode but also a short pass filter that allows an increased amount of photons having high energy (such as in visible and near infra-red regions of the spectrum) into the active region or absorber of the photovoltaic device.

Aspects relate to an depth sensing system for capturing an image containing depth information of an object. In one embodiment, a depth sensing device for use in conjunction with multiple depth sensing devices for capturing an image containing depth information of an object comprises a near-infrared transmitter comprising a laser capable of producing a near infra-red light beam, a diffractive optical element positioned to receive a light beam emitted from the laser, the diffractive optical element, and a collimating lens, and a near-infrared receiver coupled to the transmitter in a relative position, the receiver comprising a sensor assembly capable of producing an image of the received light, the depth sensing device being configured to transmit and receive near infra-red light beams during a time period that is different than any of the other of two or more transmitter-receiver pairs of devices in communication with the depth sensing device.

The invention comprises a composite material comprising a host material in which are incorporated semiconductor nanocrystals. The host material is light-transmissive and/or light-emissive and is electrical chargetransporting thus permitting electrical charge transport to the core of the nanocrystals. The semiconductor nanocrystals emit and/or absorb light in the near infrared spectral range. The nanocrystals cause the composite material to emit/absorb energy in the near infrared (NIR) spectral range, and/or to have a modified dielectric constant, compared to the host material. The invention further comprises electro-optical devices composed of this composite material and a method of producing them. Specifically described are light emitting diodes that emit light in the NIR and photodetectors that absorb light in the same region.

Described is a method which uses spectral data simultaneously collected in a continuous array of discrete wavelength points of the visible spectrum adjacent to the infrared and near infrared part of the light spectrum. The spectral data is collected using a number of detectors with different sensitivity ranges. Some detectors may be sensitive to visible and possibly, to part of the near infrared portion of radiation. Spectral data from die infrared spectrum is collected with the infrared detectors, and are in some embodiments insensitive to the visible links.

A system for measuring and converting to an observer intelligible form an internal physiological parameter of a medical patient. The invention allows transcutaneous telemetry of the measured information intracranial pressure via a system which includes a patient implanted sensor module and a processing and display module which is external of the patient and optically coupled to the sensor module via an external coupling module. A sensor within the implanted module transduces the measured information and a near infrared (NIR) emitter transmits this telemetry information when interrogated by the complementary external coupling module. Power for the sensor module is derived inductively through rectification of a transcutaneously-applied high-frequency alternating electromagnetic field which is generated by a power source within the external coupling module, in concept much like a conventional electrical transformer. A computer within the processing and display module calculates the parameter value from the NIR telemetry signal and represents this data either in numerical, graphical, or analog format.

In a near-infrared reflective substrate prepared by forming on a transparent substrate a near-infrared reflective film prepared by alternate deposition of low-refractive-index dielectric films and high-refractive-index dielectric films, there is provided a near-infrared reflective substrate characterized in that the transparent substrate is a plate glass or polymer resin sheet, that it is 70% or greater in visible light transmittance defined in JIS R3106-1998, and that it has a maximum value of reflection that exceeds 50% in a wavelength region of 900 nm to 1400 nm.

A method and system for eye-safe near infra-red (NIR) optical imaging illumination. An eye of an intended subject are imaged with visible light or NIR light at an unconditionally eye-safe illumination level and the maximum permissible eye-safe NIR illumination that can be applied to the eye is determined from the captured images. The eye of the intended subject can then be illuminated with at least one substantially maximal NIR light pulse having a pulse intensity and duration selected to provide the substantially maximum permissible eye-safe NIR illumination intensity at the eye. NIR light pulse illumination can be inhibited in response to detection of other subjects either within the vicinity of a volume extending between an NIR illuminator illuminating the eye and the intended subject. The likelihood that an intended subject has been recently illuminated can also be determined and statistical measures can be used to avoid re-illuminating subject unnecessarily.

Disclosed are photometric methods and devices for determining optical pathlength of liquid samples containing analytes dissolved or suspended in a solvent. The methods and devices rely on determining a relationship between the light absorption properties of the solvent and the optical pathlength of liquid samples containing the solvent. This relationship is used to establish the optical pathlength for samples containing an unknown concentration of analyte but having similar solvent composition. Further disclosed are methods and devices for determining the concentration of analyte in such samples where both the optical pathlength and the concentration of analyte are unknown. The methods and devices rely on separately determining, at different wavelengths of light, light absorption by the solvent and light absorption by the analyte. Light absorption by the analyte, together with the optical pathlength so determined, is used to calculate the concentration of the analyte. Devices for carrying out the methods particularly advantageously include vertical-beam photometers containing samples disposed within the wells of multi-assay plates, wherein the photometer is able to monitor light absorption of each sample at multiple wavelengths, including in the visible or UV-visible region of the spectrum, as well as in the near-infrared region of the electromagnetic spectrum. Novel photometer devices are described which automatically determine the concentration of analytes in such multi-assay plates directly without employing a standard curve.

The invention discloses a multi-wavelength high-sensitivity online monitor of multi-component NH3 and H2O based on semiconductor laser absorption spectroscopy. It contains host chassis and open long-path system. Equip power receptacle, switch, fiber connector and data transmission interface. It is characterized in that: there are near-infrared semiconductor laser, semiconductor laser controller, phase-locked amplifier, signal generator, data collecting and controlling module and infrared detector in host chassis which is connected with field optical system by fiber. Open optical system contains send-receive optical telescope and multielement reflector array. Optical telescope has input and output fiber couplers. The device realizes simultaneous testing of gas multi-component by using multi-wavelength and frequency division multi-signal detecting technique.

The invention discloses a near-infrared laser scanning confocal imaging system, which comprises a light path scanning unit and a control unit which adopt a confocal structure, wherein the light path scanning unit comprises a near-infrared laser source, a collimation and extension module, a laser optical filter, a dichroic reflector, a scanning galvanometer, an f-theta lens, a tube lens, an imaging objective lens, a fluorescent optical filter, a convergent lens, a pinhole, a detector and the like, the control unit comprises a motion control module used for controlling the scanning galvanometer, a data acquisition module used for acquiring an output signal of the detector, a data processing module connected with the motion control module and the data acquisition module, and the like. The method matched with the system is characterized in that a sample is marked with near-infrared quantum dots with the fluorescence emission spectrums between 932nm and 1250nm, and then the sample is detected by the near-infrared laser scanning confocal imaging system. According to the system disclosed by the invention, deep-level imaging of samples such as biological tissues can be accurately and efficiently realized, and the system has a simple structure and is easy to operate.

The invention belongs to the technical field of nanometer biological materials, and particularly relates to an 800nm excitation-based up/down conversion dual-mode fluorescent nanomaterial for Nd<3+> sensitization and a synthesis method thereof. The synthetic up/down conversion dual-mode fluorescent nanomaterial for Nd<3+>sensitization designed by the invention has a multi-layer core-shell structure, and comprises a down conversion luminous layer, an up conversion luminous layer, an isolation layer and a passivation layer. Different layers of the material synergistically play respective different roles, and meanwhile, the dual-mode fluorescent probe with up conversion fluorescence and down conversion fluorescence is finally achieved under an 800nm of excitation light with a low-heat effect. The up conversion excitation light is expanded to about 800nm from 980nm by Nd<3+>, Yb<3+> and Er<3+>-doped NaGdF4:Nd, Yb, Er up conversion layer due to introduction of Nd<3+>, and the fluorescent process from a near infrared light to a visible light is achieved. The process meets the requirements of an in-vitro fluorescent probe. In addition, the typical down conversion fluorescence from the near infrared light to a far infrared light is also achieved in one nanoparticle due to the synergistic effect of the NaGdF4:Nd core.

A method of thermocompressive bonding of one or more electrical devices using individual heating elements and a resilient member to force the individual heating elements into compressive engagement with the electrical devices is provided. The individual heating elements may be Curie-point heating elements or conventional resistive heating elements. A method of thermocompressive bonding of one or more electrical devices using a transparent flexible platen and thermal radiation is also provided. In one embodiment, the thermal radiation is near infra-red thermal radiation and the transparent flexible platen is composed of silicone rubber. The bonding material may be an adhesive or a thermoplastic bonding material. A method of capacitively coupling a semiconductor chip to an electrical component with a pressure sensitive adhesive is also provided. The method includes compressing the chip by forcing a flexible platen of a bonding device into compressive engagement with the semiconductor chip.

An interference filter includes a layers stack comprising a plurality of layers of at least: layers of amorphous hydrogenated silicon with added nitrogen (a-Si:H,N) and layers of one or more dielectric materials, such as SiO₂, SiO_x, SiO_xN_y, a dielectric material with a higher refractive index in the range 1.9 to 2.7 inclusive, or so forth. The interference filter is designed to have a passband center wavelength in the range 750-1000 nm inclusive. Added nitrogen in the a-Si:H,N layers provides improved transmission in the passband without a large decrease in refractive index observed in a-Si:H with comparable transmission. Layers of a dielectric material with a higher refractive index in the range 1.9 to 2.7 inclusive provide a smaller angle shift compared with a similar interference filter using SiO₂ as the low index layers.

The invention relates to a method for diagnosing the crop water deficit through a hyperspectral image technology, and especially relates to a method for diagnosing the Lycopersicon esculentum Mill. leaf area water based on hyperspectral images. The method comprises the following steps: 1, acquiring Lycopersicon esculentum Mill. leaf hyperspectral image data through a self-constructed hyperspectral imaging system; 2, selecting a characteristic wavelength by optimizing through an adaptive band selection process to realize multidimensional datum dimensionality reduction; 3, dividing the image ofeach sample at the characteristic wave, counter-rotating, carrying out form operation to obtain a target image, and extracting the leaf gray level and the leaf texture characteristic from the target image; and 4, selecting an optimal characteristic subclass through a GA-PLS (genetic algorithm-partial least square) process by fusing the gray scale and the texture characteristic and aiming at ten characteristic variables, and establishing a partial least square regression model based on the optimal characteristic, wherein the correlation coefficient R between a predicted value and a measured value of the model is 0.902. Compared with routine detection methods, the method of the invention has the advantages of rapid detection speed, and simple and convenient operation; and compared with a single near infrared spectroscopy or computer vision technical means, the method of the invention allows obtained information to be comprehensive, and the accuracy and the stability of the detection result to be improved.

A solar photovoltaic module (1) intended to receive incident light, said incident light comprising incident visible light and incident near infrared light, visible light being defined as light having a wavelength between 380 nm and 700 nm, excluding 700 nm and near infrared light is defined as light having a wavelength between 700 nm and 2000 nm, characterized in that said solar photovoltaic module (1) comprises: —a photovoltaic element (2), sensitive to near-infra red light, —at least a first infrared transmitting cover sheet (4), arranged to one side of said photovoltaic element (2), comprising: —infrared transmission means arranged to transmit at least 65% of said incident infrared light through said infrared transmitting cover sheet, —visible light transmission means arranged to transmit as less as possible incident light having wavelengths lower than 600 nm, preferably lower than 650 nm, more preferably lower than 700 nm, excluding the wavelength of 700 nm, through said infrared transmitting cover sheet (4), —reflection means arranged to reflect a portion of said incident visible light of said infrared transmitting cover sheet (4), to the side of said incident light.