565results about "Absorption/flicker/reflection spectroscopy" patented technology

The invention provides a spectrometer system comprising a spectrometer chip comprising a camera and a metasurface located on a detection surface of the camera; the metasurface comprises a plurality of nano-pore or nano-column arrays, and selective absorption of light with different wavelengths is realized through surface plasmons generated by different nano-pores or nano-columns; the camera detects the intensity change of light to be detected after the light passes through different nano-pores or nano-column arrays of the metasurface, and then spectral information is obtained through calculation. According to the spectrograph system, selective absorption of light with different wavelengths is achieved through the metasurface, and then spectral information is obtained through calculation, so that the structure of the spectrograph system is compact, and the overall size is very small; and the plasmon generated by the nanopore or nanopillar array has high tolerance to the structure size, so that the processing precision is lower, and large-area and large-batch preparation can be realized.

The present invention relates in one aspect to an absorption spectroscopy apparatus for measuring one or more gases in an atmosphere, wherein the apparatus comprises a wavelength-tunable laser source, a control circuit configured to provide an electrical drive current to the wavelength-tunable laser source; wherein the control circuit is configured to create the electrical drive current as a modulated drive current, wherein the modulated drive current alternates between at least a first and a second drive current, the first drive current configured to cause the wavelength-tunable laser source to emit laser radiation at a first wavelength and the second drive current configured to cause the wavelength-tunable laser source to emit laser radiation at a second wavelength, different from the first wavelength, and wherein the modulated drive current defines a sequence of pulses, each pulse having a non-rectangular pulse shape.

The invention provides a precise and small broadband hyperspectral imager, which is used for solving the technical problem that the existing broadband spectral imager from visible near-infrared to short-wave infrared for sceneries cannot meet the increasingly harsh imaging requirements. According to the small broadband hyperspectral imager, the front optical assembly of an off-axis two-reflection structure and the spectrometer assembly in a free-form surface reflector, optical path multiplexing and axis folding mode are adopted, the number of used lenses is greatly reduced, meanwhile, the length of a spectrometer is effectively reduced, and the imaging precision is improved. The volume and the weight of the spectral imager are greatly reduced; besides, front surfaces and rear surfaces of a first lens and a second lens in the spectrometer assembly are plated with broadband antireflection films from visible near-infrared to short-wave infrared according to light angles, and broadband detection from visible near-infrared to short-wave infrared can be realized in combination with a broadband refrigeration type detector. And the complexity and the installation and adjustment difficulty of the detector assembly and the circuit assembly are greatly reduced.

A method includes determining whether a variation in probe radiation intensity meets a stability criterion; directing the probe radiation through a probe, when the probe is disposed at a first position, defining a first path length L1 of the probe radiation through the fluid sample; measuring a transmitted intensity I1 of the probe radiation after passing through the fluid sample when the probe is disposed at the first position; directing the probe radiation through the probe when the probe is disposed at a second position, defining a second path length L2 of the probe radiation through the fluid sample; measuring a transmitted intensity I2 of the probe radiation after passing through the fluid sample when the probe is disposed at the second position; and determining a concentration C of a material in the fluid sample based upon L1, I1, L2, and I2, when the stability criterion is met.

A spectrometer apparatus (110) and method of obtaining spectroscopy information about at least one object (112) are disclosed. The spectrometer device (110) comprises: at least one light source (114) for generating illumination light (116) for illuminating the object (112), the light source (114) comprising at least one light emitting diode (118) and at least one luminescent material (120) for converting primary light generated by the light emitting diode (118) into secondary light; ii. At least one broadband detector (128) for detecting detection light (130) within a spectral range at least partially comprising a spectral range of the primary light and the secondary light, the broadband detector (128) is configured to generate at least one primary detector signal upon detection of the detection light (130) within the spectral range of the primary light, where the broadband detector (128) is further configured to generate at least one secondary detector signal upon detection of the detection light (130) within the spectral range of the secondary light; and iii. At least one evaluation unit (136) for evaluating the primary detector signal and the secondary detector signal generated by the broadband detector (128), for determining responsivity information (137) about the broadband detector (128) from one of the primary detector signal or the secondary detector signal, and for deriving spectroscopy information about the object (112) from the other of the primary detector signal or the secondary detector signal by taking into account responsivity information (137) about the broadband detector (128).

A gas absorption spectrometer is a gas absorption spectrometer that measures sample gas, and includes a resonator 100A including at least two mirrors, a laser light source that emits laser beams for irradiation of the resonator 100A, and a photodetector that detects light taken out of the resonator. The resonator includes an inner chamber 1A where mirrors 21 and 22 are accommodated, the inner chamber defining a measurement space 15 where sample gas is to be introduced, an outer chamber 3 arranged outside inner chamber 1A for vacuum insulation of the measurement space 15 from the outside, and a cooler 9 arranged within the outer chamber 3 at a distance from the inner chamber 1A, the cooler including an internal space where coolant flows.

A method for differentiating gas sources based on temperature includes transmitting an optical beam through a plume emitted by a combustion system. The method includes detecting the optical beam, after propagating through the plume, to obtain an absorption spectrum. The method includes determining, based on the absorption spectrum, a first path-integrated concentration of a gas species, a first temperature of the first path-integrated concentration, a second path-integrated concentration of the gas species, and a second temperature of the second path-integrated concentration. The second temperature is different from the first temperature. The method may further include performing an inversion to obtain a sampled quantity of the gas species within the plume. The method may be implemented with dual-comb spectroscopy, in which case the optical beam is formed from two frequency combs having slightly different repetition rates.

A photometric process measurement arrangement and a photometric measurement method The invention refers to a photometric process measurement arrangement (10) comprising a photometric immersion probe (20) comprising a photometer flashlight source (61) for providing photometric light impulses, a photometric detector arrangement (70) comprising a separate wavelength-selective detection element (71, 72, 73), and a photometer control (80) controlling the photometer flashlight source (61) and the detector arrangement (70), The photometer control (80) comprises: An impulse signal integrator (819, 829, 839) for integrating the electric impulses having the impulse intensity (Ui) generated by the detection element (71, 72, 73) of one impulse integration cycle (204; 221; 264), a measurement cycle control (90) for adapting the total number of 20 integrated cycle impulses of an impulse integration cycle (204;221;264) to the impulse intensity (Ui) of the single electric impulses, an A / D-converter (81, 82, 83) for converting the voltage of the impulse signal integrator (819, 829, 839) in an optional compulsory A / D conversion interval (100) after the impulse integration cycle (204;221;264), and an A / D-conversion management module (150) for balancing the total number of A / D conversion intervals (100-111) within a time frame (F), whereas the number of supplementary A / D conversion intervals (101-111) after the compulsory A / D conversion interval (100) depends on the length of the corresponding impulse integration cycle (204; 221; 264).

The utility model provides a spectrum acquisition system. The spectrum acquisition system comprises a light source; the spectrograph and the light source are oppositely arranged; the station switching device comprises a support, a driving device and a plurality of stations arranged on the support, the support is provided with a support rotating shaft, the stations are arranged at intervals in the circumferential direction of the support rotating shaft, the driving device can drive the support to rotate around the support rotating shaft, and any station can be positioned between the light source and the spectrograph. The driving device is elastically connected with the bracket through the elastic piece; and the positioning device comprises a limiting part, and the support can abut against the limiting part through the acting force applied by the elastic piece, so that one of the multiple stations is positioned between the light source and the spectrograph. According to the technical scheme, the problem that in the prior art, a station switching device in a spectrum collection system is not high in precision, and consequently measurement accuracy is affected is solved.

The invention refers to a photometric process measurement arrangement (10) with a photometric immersion probe (20). The photometric immersion probe (20) comprises a photometer flashlight source (61) for providing photometric light impulses, a photometric detector arrangement (70) comprising at least two separate wavelength-selective detection elements (71, 72, 73), and a photometer control (80) controlling the photometer flashlight source (61) and the detector arrangement (70). The photometer control (80) comprises several impulse signal integrators (819, 829, 839) for integrating the electric impulses generated by the detection elements (71, 72, 73), several A / D-converters (81, 82, 83) for converting the voltages of the impulse signal integrators (819, 829, 839) when high-precision-converting trigger ports (H) of the A / D-converters (81, 82, 83) are triggered, and a measuring cycle control (90) with an integration target memory (94) memorizing an integration target voltage value (Ut). The photometer control (80) is provided with a high-precision-request port (93) for synchronously triggering the high-precision-converting trigger ports (H) of all A / D-converters (81, 82, 83) after the voltage of the first of all impulse signal integrators (819, 829, 839) has exceeded the memorized integration target voltage value (Ut).

The invention discloses a MoTe2 / Bi < 0.5 > Sb < 1.5 > Te3 heterojunction thin film and application thereof in broadband near-infrared photoelectric detection. The heterojunction thin film is formed by stacking a MoTe2 thin film prepared by magnetron sputtering and a Bi < 0.5 > Sb < 1.5 > Te3 thin film prepared by magnetron sputtering, and the MoTe2 thin film and the Bi < 0.5 > Sb < 1.5 > Te3 thin film are in direct contact to form a heterojunction interface; the preparation method comprises the following steps: putting a cleaned n-Si substrate into a magnetron sputtering instrument, sputtering a MoTe2 film in an inert atmosphere, and carrying out annealing treatment to obtain n-Si / MoTe2; and continuously putting the n-Si / MoTe2 into the magnetron sputtering instrument, sputtering a Bi0. 5Sb1. 5Te3 film on the surface of the MoTe2 film in an inert atmosphere, and carrying out annealing treatment. According to the invention, a self-powered practical device with high responsivity, high specific detection rate, fast response speed and high stability can be obtained.

An infrared detector includes a tuning fork resonator comprising an mechanical-to-electrical transduction mechanism; a metamaterial absorber residing on at least one side of the tuning fork resonator, the metamaterial absorber comprising at least a material layer with subwavelength inclusions; and a signal processing circuit to translate the electrical signal into an amplitude of mechanical motion of the tuning fork.

A system and method using remote sensing instrument with hyper spectrum quantitatively measure metal dust elements in lubricating oil, which includes (not limited): Al, Cd, Cr, Cu, Fe, Pb, Mg, Mn, Mo, Ni, Ag, Sn, Ti, V, Zn, B (Boron, for Coolant), Ca (Calcium for water contaminant), and particle size, cone penetration, dropping point, steel mesh oil separation, moisture, PQ concentration, in few seconds. The instrument integrates near-field communication (NFC), Internet of Thing (IoT), Cloud computing, spectral matching and other data processing, and application software forming a system to easily operated and build a model enable self-learning to improve precision through collection accumulation. With the system, the instrument as FIG. 1 can provide comprehensive on-site analysis enable preventive maintenance of mission critical engine and rotating equipment. The characteristics of the system are easy to operate, get result quickly, and self-learning to improve precision.

A medication assurance system for verification of both the medication and the patient is disclosed. A portable spectrometer is used to obtain a light spectrum of the medication. A subject identification or biometric device is used to identify the patient. A controller coupled to the portable spectrometer and the subject identification device identifies the medication by performing a chemometric analysis of the light spectrum. Based on the medication identified and the patient identified, the controller can determine if the medication is to be taken by the patient.

The present invention relates to a method for operating a spectrometer device (126) for obtaining at least one item of spectral information on at least one object (128), wherein the method comprises the following step: 5. obtaining the item of spectral information on the object (128) by evaluating the item of object measurement information and the item of open port measurement information, wherein at least one of: the item of object measurement correction information and the item of open port measurement correction information are further evaluated when obtaining the item of spectral information in order to compensate for at least one deviating measurement condition during the generation of the item of object measurement information and the item of open port measurement information.

A line-field optical coherence tomography (OCT) system and an absorbance spectroscopy system are provided that use a tunable or swept laser architecture in a cat's eye configuration with a tilt-tuned thin-film interference filter, preferably a transmissive tilt-tuned thin-film interference filter. [Solution] The optical coherence tomography system 200 of the present invention comprises a tunable laser 100 including a gain chip 110, a collimating lens 118 that collimates light from the gain chip 110, an end reflector 122, a focusing lens 120 that focuses the collimated light 124 onto the end reflector 122, a thin-film bandpass filter 130 between the collimating lens 118 and the focusing lens 120, and at least one angle control actuator 132 that changes the angle of the thin-film filter 130 relative to the collimated light 124, an interferometer having a reference arm 212 and a measurement arm 214 that receives light from the laser 100, and a sensor 230 that detects an interference signal between the light from the reference arm 212 and the light from the measurement arm 214.

Presented herein is an illumination assembly for providing polychromatic measurement light (230) for an optical measurement device. The illumination assembly includes an aperture component (202) having a first side and an opposing second side and at least one orifice (204), at least one pump light source (206) positioned to provide pump light (220) to the first side of the aperture component (202), and a photoluminescent component (208) positioned on the second side of the aperture component (202) for converting the pump light (220) receptive on the photoluminescent component (208) from the at least one pump light source (206) into polychromatic measurement light (230). At least a portion of the measurement light (230) can pass through the aperture component (202) through the at least one orifice (204) to provide the measurement light (230) to the first side of the aperture component (202). Also presented are related methods and measurement apparatus for using the lighting assembly.

We provide a cavity ring-down spectrometer that enables accurate measurement of extremely low-temperature samples. [Solution] The gas absorption spectrometer is a gas absorption spectrometer for measuring a sample gas and comprises a resonator 100A including at least two mirrors, a laser light source that emits laser light for irradiating the resonator 100A, and a photodetector for detecting the light extracted from the resonator. The resonator includes an inner chamber 1A that houses the mirrors 21 and 22 and forms a measurement space 15 into which the sample gas is introduced, an outer chamber 3A disposed outside the inner chamber 1A for vacuum insulation of the measurement space 15 from the outside, and a cooler 9 disposed within the outer chamber 3A, spaced apart from the inner chamber 1A, and having an internal space through which a refrigerant flows.

To provide a terahertz wave interferometry device that can shorten measurement time. [Solution] The terahertz wave interference measuring device 1A comprises an optical pulse train output unit 10A, a first conversion unit 21, a second conversion unit 22, a multiplexing optical system 23, and a detection unit 40A. The optical pulse train output unit 10A outputs a periodic first optical pulse train P1 having a first repetition frequency, and a periodic second optical pulse train P2 having a second repetition frequency smaller than the first repetition frequency. The first conversion unit 21 converts the first optical pulse train P1 into a first terahertz wave T1. The second conversion unit 22 converts the second optical pulse train P2 into a second terahertz wave T2. The multiplexing optical system 23 combines the first terahertz wave T1 with the second terahertz wave T2 to generate a third terahertz wave T3. The detection unit 40A detects the third terahertz wave T3.

Dissolving activity analyzer including an integrating cavity comprising a reflective inner wall or walls, and configured to receive a cuvette containing liquid sample. The integrating cavity comprises a light inlet port and a light outlet port, the light inlet port being configured to receive light from a light source and the light outlet port being configured to deliver light to a spectrometer. The dissolving activity analyzer is configured to operate in a diffusely reflecting mode in which light from the light source follows a light path from the inlet port into the integrating cavity, is incident onto the reflective inner wall or walls and is diffusely reflected, such that the light from the light source irradiates the liquid sample before being transmitted through the light outlet port and received by the spectrometer to provide an absorbance spectrum of the liquid or liquid matrix contained in the liquid sample.

An apparatus comprising a compact folded path cell for optical gas detection and / or measurement utilizing gas absorption spectroscopy. The apparatus includes an electromagnetic radiation source, a gas sample cell housing a reflector, and a detector for electromagnetic radiation. The source and detector are positioned between the reflector elements in a configuration that reflects the radiation away from the source and detector until the reflected radiation has a suitable optical path length, and then reflects the radiation towards the detector. Using spectroscopic analysis, the presence of at least one gas species in a gas sample can be determined and / or at least one parameter can be measured.

The invention comprises a method and system for cost effective, convenient remote high fidelity color reproduction and matching that can be used to convey color to observers remote from the physical source of color. Such remote observers can include product consumers wishing to view a product color, for example. In a preferred embodiment, the method comprises capture of article or product reflectance spectra and the use of this spectrum to filter ambient light or directed light in the environment of a user remote from the article or product. Other embodiments of methods include various techniques to capture product spectral information and color matching functions useful for color reproduction using colored light sources. Additional systems embodiments include devices exploiting multiprimary displays to render the product color with reduced metamerism.

There is set forth herein a light energy exciter that can include one or more light sources. A light energy exciter can emit excitation light directed toward a detector surface that can support biological or chemical samples.

According to a first aspect of the present invention there is provided a method of measuring the optical reflectance R of a target using a detection system comprising a light emitter and a light detector spaced apart from one another. The method comprises illuminating the target with the light emitter, detecting light reflected from the target using the light detector, wherein the light detector provides an electrical output signal S S indicative of the intensity of the detected light, and determining the optical reflectance R of the target according to (Formula 1), where RR is the spectral reflectance of a reference standard, SR is the detector electrical output signal with the reference standard in place, SH is the detector electrical output signal with no target in front of the light emitter and light detector, and M is a calibration factor.

A gas sensor (100) is described, which comprises a gas absorption cell (6), configured to house a gas to be detected, an incandescent light bulb (1) comprising a glass bulb (2) and a filament (3) enclosed in the glass bulb (2). The gas sensor (100) also comprises a first detector (4), configured to detect radiation in a first wavelength range of 1-5 um, and a control unit (7), configured to provide a drive current through the filament (3) of the incandescent light bulb (1) during operation of the gas sensor (100). The gas sensor comprises a second detector (5), configured to detect radiation in a second wavelength range of 6-15 µm radiation. The second detector (5) is arranged such that the second detector (5) is illuminated by radiation from the incandescent light bulb (1) during operation of the gas sensor (100).

An optical detector (100, 200, 300) for detecting gas and suspended matter therein includes a test chamber (111, 113), at least one light source (12), a sensing object (131, 133), a test optical sensor (141) and a processor (19). The test chamber (111, 113) accommodates a gas to be analyzed. The at least one light source (12) emits an incident light that enters the test chamber (111, 113). The sensing object (131, 133) is exposed to gas in the test chamber (111, 113), receives the incident light, and reflects or transmits a portion of the incident light to form a test light. The test optical sensor (141) receives the test light and generates a detected spectral signal. The processor (19) receives the detected spectral signal and calculates a detection result according to the detected spectral signal.

A system and method for determining a level of an analyte parameter, comprising: causing a photon source to send photons to a probe sensitive to an analyte, exciting the probe to emit light; receiving optical data from a photodetector based on the light emitted from the probe; determining a difference between a first level of the analyte parameter at a first location adjacent to a first surface of the probe and an intermediate level of the analyte parameter at an intermediate location between the first location and a second location adjacent to a second surface of the probe; and determining a second level of the analyte parameter adjacent to the second surface of the probe based on the difference between the first level of the analyte parameter and the intermediate level of the analyte parameter.

A liquid (2) measurement chamber extension (10) for spectrophotometric characterization of a liquid (2) in a polymer container (3) by a NIR spectrophotometer (1) or a Raman spectrophotometer (1), the measurement chamber extension (10) comprising an adapter plate (11) having an adapter opening (11'); a container holder (7); and an optical element (5) selected from a mirror and a waveguide; the adapter (11) is configured to cover a measurement chamber (20) of the NIR spectrophotometer (1) or the Raman spectrophotometer (1) in a light-tight manner, the adapter opening (11') surrounding a measurement window of the NIR spectrophotometer (1) or the Raman spectrophotometer (1) to allow the NIR spectrophotometer (1) or the Raman spectrophotometer (1) to measure the spectrophotometric characterization of the liquid (2) in the polymer container (3). a measurement chamber extension (10) configured to provide exposure of the liquid (2) to a measurement light beam emitted from a measurement chamber (20) of a spectrophotometer (1) through the measurement window; the container holder (7) configured to bring the optical element (5) in close proximity to the polymer container (3) containing the liquid (2) to provide loss-free transmission or transflective of the measurement light beam from the optical element (5) to a detector of the NIR spectrophotometer (1) or the Raman spectrophotometer (1), the container holder (7) comprising a clamp (13) configured to hold a tubular section (3a) of the polymer container (3) to enable reproducible measurement conditions.

The present disclosure concerns a portable spectrometer analyzer, comprising: a housing; a vial receptable provided in the housing and being configured to receive a vial containing a sample fluid; a light source mounted within the housing and positioned to emit light into the vial to contact the sample fluid and produce sample-affected light; a spectrometer sensor mounted within the housing and positioned to receive or capture the sample-affected light and generate sensor data; and a processor mounted within the housing and configured to: receive the sensor data from the spectrometer sensor; perform an evaluation of the sensor data with respect to a predetermined analysis model. Methods of calibrating a portable spectrometric analyzer, of obtaining spectrometric and colorimetric measurements and of manufacturing a portable spectrometer analyzer are also concerned.