811results about "Absorption/flicker/reflection spectroscopy" patented technology

Modulation-encoded light, using different spectral bin coded light components, can illuminate a stationary or moving (relative) target object or scene. Response signal processing can use information about the respective different time-varying modulation functions, to decode to recover information about a respective response parameter affected by the target object or scene. Electrical or optical modulation encoding can be used. LED-based spectroscopic analysis of a composition of a target (e.g., SpO2, glucose, etc.) can be performed; such can optionally include decoding of encoded optical modulation functions. Baffles or apertures or optics can be used, such as to constrain light provided by particular LEDs. Coded light illumination can be used with a focal plane array light imager receiving response light for inspecting a moving semiconductor or other target. Encoding can use orthogonal functions, such as an RGB illumination sequence, or a sequence of combinations of spectrally contiguous or non-contiguous colors.

The invention discloses a traceable cavity ring-down spectrometer system with a self-calibration function, and is applied to the technical field of gas concentration detection. The device comprises an optical cavity ring-down main body, a dynamic generation module and a reference analysis module which are connected in sequence, wherein the optical cavity ring-down main body comprises a laser light source, a beam splitter, an optical fiber isolator, a lens, a first reflecting lens, a first aluminum ring, a sample cell, a second aluminum ring, a cross shaft type universal coupling control device and a second reflecting lens which are arranged along a laser light path; the dynamic generation module comprises a high-purity gas inlet, a gas purifier, a dynamic generation device, a standard gas outlet and a three-way electromagnetic valve which are arranged along a gas path; the reference analysis module comprises an instrument standard gas inlet, a reference analyzer and a standard gas storage box which are arranged along the gas path. According to the method, the influence of instrument drift on analysis data caused by the use environment and instrument part loss of the online instrument is avoided, and the accuracy and the quantity value traceability of the instrument analysis data are guaranteed.

The invention discloses a multi-component gas detection device and method based on a metasurface quasi-continuous domain bound state. The advanced nanometer manufacturing technology and the deep learning algorithm are adopted, and high-precision, high-sensitivity and high-selectivity gas detection is achieved. According to the invention, the metasurface array with specific design is utilized, and the quasi-continuous domain bound state in the middle-infrared band is realized by accurately regulating and controlling the geometric parameters and material characteristics of the microstructure, so that excellent optical response is obtained. In combination with a deep learning algorithm, complex spectral information is converted into accurate gas composition and concentration information, and a reliable solution is provided for the fields of environmental monitoring, industrial production, safety monitoring and the like.

The invention discloses an equipment on-line temperature measurement monitoring method based on thermal imaging, and relates to the technical field of on-line temperature measurement. The method comprises the following steps: synchronously acquiring reflection spectrum data and infrared thermal radiation data of a target surface through an integrated spectrum sensing module and a thermal imaging module; inverting the initial emissivity of the target area according to the reflection spectrum data based on Kirchhoff's law and a pre-stored material feature library; dynamically correcting the initial emissivity to generate a pixel-by-pixel corrected emissivity matrix; and carrying out pixel-by-pixel temperature calculation on the thermal imaging original data, constructing an equipment surface temperature distribution model, and carrying out abnormity early warning according to a preset threshold value. According to the method, through deep fusion of spectrum sensing and thermal imaging data, pixel-by-pixel emissivity calibration of complex surface equipment is realized, and the temperature measurement precision and reliability are remarkably improved.

Devices, methods and systems are disclosed for monitoring and analysis of bodily emissions emitted from a user. The device comprises at least an image capturing apparatus, at least one light emission source and, at least one sensor for capturing and monitoring excreta and urine from the user. An artificial intelligence based analysis system is utilized to process data collected from the device and determined at least one parameter based on the analysis. The determined parameter determines health-related information, which is communicated to the user via a user interface.

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 invention provides a single-pixel-based visible light infrared fusion compression spectrum imaging system and method, and the method comprises the following steps: 1, carrying out the signal coding of a to-be-detected target signal, and obtaining a coded to-be-detected target infrared signal and a coded to-be-detected target visible light signal; step 2, inputting a to-be-measured target infrared signal into an infrared imaging light path, collecting a medium-wave infrared spectrum intensity value, and inputting a to-be-measured target visible light signal into a visible light imaging light path to collect a visible light spectrum intensity value; step 3, carrying out compressed sampling and reconstruction operation on the visible light spectrum intensity value and the medium wave infrared spectrum intensity value to obtain an infrared hyperspectral image and a visible light hyperspectral image of the target to be detected; 4, performing image fusion according to the infrared hyperspectral image and the visible light hyperspectral image to obtain a fused image with rich details; the fusion imaging of the method has the characteristic of keeping the feature information of the target scene so as to realize high-quality imaging.

A system for evaluating a sample, the system includes (i) a chopper that includes (i.1) a disc that is made of a transparent material that bears an inner opaque pattern and outer opaque pattern, the outer opaque pattern surrounds the inner opaque pattern, and (i.2) a rotating unit that is configured to rotate the disc during a modulation period, (ii) first optics, (iii) second optics, (iv) a control unit that is configured to detect a second modulated beam from the second optics, and control the rotating unit based on at least one parameter of the second modulated beam.

A self-calibrating hybrid spectrophotometer comprises a receptacle for receiving the cuvette, first and second optodes that are configured to permit light to enter the cuvette, third and fourth optodes that are configured to permit light to leave the cuvette, and a controller that is configured to control delivery of light to one of the first and second optodes. Light entering one of the first and second optodes is received at the third and fourth optodes after having interacted with the turbid sample along different paths having different lengths. Measurements made at the third and fourth optodes in response to having illuminated both the first and second source optodes provide two slopes of optical transmittance as a function of path length. The spectrophotometer uses these slopes to identify a slope that is indicative of the absorption coefficient and the reduced scattering coefficient of the sample.

The invention relates to the technical field of fire safety monitoring, and discloses a linear fire detection method and system based on infrared spectrum analysis and an infrared spectrum detector, and the method comprises the steps: arranging a plurality of infrared spectrum detector nodes; the collected infrared spectrum signals are preprocessed; mapping the preprocessed spectral signal to a pre-constructed low-dimensional feature space; calculating the conditional probability density of the current infrared spectrum signal in various states; judging whether the posterior probability exceeds a set fire judgment threshold value or not; the system comprises an infrared spectrum detection module, a preprocessing module, an embedded mapping module, a discrimination module and a linkage control module. The infrared spectrum detector comprises a spectrum sensing unit, a signal processing unit, a data communication unit and a data uploading interface. According to the method, the technical effects of keeping high sensitivity and low false alarm rate under complex and changeable working conditions are achieved through a combined discrimination model of embedding mapping, kernel density estimation and Bayesian posteriori.

Systems and methods of detecting and monitoring edema in a subject are described. The systems and methods include light sources, image detectors, filters, and processors that determine whether a subject has edema and the degree of severity. In some embodiments, the processor fuses data from more than one imaging modality.

Apparatus and methods are described for use with a bodily emission of a subject that is disposed within a toilet bowl. While the bodily emission is disposed within the toilet bowl, light is received from the toilet bowl using one or more light sensors. Using a computer processor, intensities of at least two spectral bands that are within a range of 530 nm to 785 nm are determined, by analyzing the received light, and a ratio of the intensities of the two spectral bands is determined. In response thereto, the computer processor determines that there is a presence of blood within the bodily emission. The computer processor generates an output on an output device, at least partially in response thereto. Other applications are also described.

An aspect of the disclosure provides an interferometric near infrared spectroscopy, iNIRS, system comprising: a light emitting arrangement comprising: a first light source configured to provide wavelength-swept emission of light through a plurality of different wavelengths in a first wavelength range; a second light source configured to provide wavelength-swept emission of light through a plurality of different wavelengths in a second wavelength range different to the first wavelength range; a common sample delivery channel coupled to each of the first and second light sources to receive light therefrom and to deliver said light towards a subject; and one or more reference channels for receiving reference light from the first light source and / or the second light source; a light detecting arrangement comprising an interferometrie optical detector; wherein the optical detector is coupled to the one or more reference channels for receiving reference light from the first and second light sources; wherein the light detecting arrangement is arranged to be coupled to the subject for the optical detector to receive sample light from the first and second light sources, the sample light comprising light which travelled along the common sample delivery channel; wherein the optical detector is arranged to combine the sample light with the reference light to provide combined light signals comprising one or more components at a beat frequency between sample light and reference light; and wherein the iNIRS system is configured to process the combined light signals for providing imaging and analysis of the subject.

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.

Apparatus and methods are described for use with a bodily emission of a subject that is disposed within a toilet bowl. One or more light sensors are configured to receive light from the toilet bowl, while the bodily emission is disposed within the toilet bowl. A computer processor detects a set of three or more spectral components that have a characteristic relationship with each other in a light spectrum of a microorganism, by analyzing the received light, and determines that there is a presence of the microorganism within the bodily emission in response thereto. Other applications are also described.

The invention relates to a method for determining whether an oilseed, a nut, in particular a hazelnut (2), or a seed is rancid, involving irradiating a sample, detecting an absorption or reflection spectrum, determining the content of at least one fatty acid decomposition product in the sample, and ascertaining a degree of rancidity using the content of the at least one fatty acid decomposition product in the sample. The method additionally involves irradiating an oilseed, a nut, in particular a hazelnut (2), or a seed, projecting reflected and / or transmitted light onto a detection photosensor (4′), detecting absorption or reflection spectra in a wavelength range of 300-2500 nm using the detection photosensor (4′), said detection photosensor having a plurality of pixels, and assigning a degree of rancidity to each pixel of the detection photosensor (4′).

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).

An optical module for spatially offset Raman spectroscopy, the optical module comprising: a laser source mounted on a substrate and configured to emit electromagnetic radiation at a target; a plurality of sensors mounted on the substrate and configured to detect electromagnetic radiation scattered from a plurality of depths in the target; and a first plurality of filters, each disposed over one or more of the plurality of sensors, wherein, the plurality of sensors and filters are arranged on the substrate at spatially offset positions from the laser source; and wherein the first plurality of filters are substantially transparent to a first wavelength band corresponding to a Raman scattering wavelength of a first molecule of the target and substantially opaque to wavelengths outside the first wavelength band.

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 tunable laser source configured to emit laser radiation; an optical system for transmitting the emitted laser radiation as a probe laser beam, and for collecting return light, in particular emitted laser radiation reflected by a remote surface, the optical system defining one or more apertures; a photodetector for detecting the collected return light, wherein the apparatus defines a transmission beam path between the tunable laser source and a transmission aperture of said at least one apertures, and the apparatus defining a receiving beam path between a receiving aperture of said at least one aperture and the photodetector; wherein the optical system is configured to have a polarization-insensitive transmittance.

A substrate processing status monitoring device (20) for monitoring a status of substrate processing performed by supplying a processing solution (S) onto a substrate (W) that is rotating, the substrate processing status monitoring device (20) including a light projecting unit (22) that irradiates the substrate with light, a light receiving unit (22) that receives light that has passed through the processing solution, a photometry unit (23) that simultaneously disperses light received by the light receiving unit into a plurality of wavelengths and simultaneously measures light intensities of the plurality of wavelengths, and an operation unit (24) that detects a change in the status of the substrate processing by generating an optical spectrum from the light intensities of the plurality of wavelengths measured by the photometry unit and comparing the optical spectrum with a reference spectrum or the optical spectrum of past previously generated during the substrate processing.

A device useful as a spectrometer or a sensor, comprising a source of a short electromagnetic pulses at a first wavelength and having a full width at half maximum in a range of 1 femtosecond-1 nanosecond; a sample holder in which the short pulses interact with the sample in the sample holder so as to form an output signal comprising a background residual of the short pulses and a sample response signal in the time domain, and an amplifier comprising nonlinear medium. The nonlinear medium comprises an input for receiving the output signal and a pump pulse at a second wavelength, and a second-order nonlinearity configured for a nonlinear process selectively amplifying the sample response signal, for example by temporally overlapping the pump pulse and the sample response signal.

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 present technology pertains to a measurement device capable of suitably measuring the spectrum of a measurement light. A measurement device according to the present technology is provided with: a luminous flux splitting unit for splitting substantially parallel luminous flux into a first luminous flux and a second luminous flux, refracting and emitting the first luminous flux, and emitting the second luminous flux in a direction symmetrical to the emission direction of the first luminous flux on the basis of a first reference plane that includes the traveling direction of the substantially parallel luminous flux, thereby causing the first luminous flux and the second luminous flux to interfere with each other; a light-condensing unit for condensing the first luminous flux and the second luminous flux on a second reference plane that includes the traveling direction of the substantially parallel luminous flux and is orthogonal to the first reference plane; a sensor unit for detecting interference light between the first luminous flux and the second luminous flux; and a calculation unit for calculating the spectrum of the substantially parallel luminous flux on the basis of a detection result by the sensor unit. The present technology can be applied to, for example, a spectroscopic measurement device.

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).

Modulation-encoded light, using different spectral bin coded light components, can illuminate a stationary or moving (relative) target object or scene. Response signal processing can use information about the respective different time-varying modulation functions, to decode to recover information about a respective response parameter affected by the target object or scene. Electrical or optical modulation encoding can be used. LED-based spectroscopic analysis of a composition of a target (e.g., SpO2, glucose, etc.) can be performed; such can optionally include decoding of encoded optical modulation functions. Baffles or apertures or optics can be used, such as to constrain light provided by particular LEDs. Coded light illumination can be used with a focal plane array light imager receiving response light for inspecting a moving semiconductor or other target. Encoding can use orthogonal functions, such as an RGB illumination sequence, or a sequence of combinations of spectrally contiguous or non-contiguous colors.