36 results about "Spectral properties" patented technology

Various implementations disclosed herein include devices, systems, and methods that initiate an action based on a detected gaze direction oriented towards a target area (e.g., a hot corner / zone). For example, an example process may include producing a reflection by directing light towards an eye using an illuminator, receiving sensor data from a sensor, wherein a direction of sensing by the sensor (e.g., the optical axis of the camera) and a direction from the eye to a target area are approximately aligned, determining a reflective property (e.g., a spectral property) of the reflection based on the sensor data, detecting that a gaze direction of the eye is approximately oriented towards the target area (e.g., a hot zone / spot) based on the reflective property, and initiating an action based on detecting that the gaze direction is approximately oriented towards the target area.

The invention relates to a method for calibrating a spectrometric measuring device (20) using a spectrometric calibration device (01). The calibration device (01) comprises a control unit, an interferometer with mirrors (02, 03) and a beam splitter (04), a broadband first radiation source (06), a laser (07) as a second radiation source, and a first detector (08). The method includes emitting broadband radiation (12a) and simultaneously emitting radiation (12b) by the laser (07), as well as simultaneously coupling these two radiations (12a, 12b) into the interferometer of the calibration device. A first interferogram is acquired based on the radiation (12b) of the laser (07). A second interferogram is acquired based on the broadband radiation (12a). A first data set with the spectral properties of the spectrometric measuring device (20) is created on the basis of the recorded interferograms.A second dataset, consisting of high-resolution sample spectra and chemically determined constituent values, is provided. Simulated sample spectra are calculated from the two datasets. A chemometric calibration model for the measuring device (20) is created from the simulated sample spectra. The invention also relates to a spectrometric calibration device (01).

It is a spectrometric measuring method and a measuring device for measuring a measurand of a liquid medium (3) in which disturbances can occur that include air bubbles, gas bubbles and / or particles whose dimensions are larger than in a measuring wavelength range (Δλ m ) contained wavelengths (λi). Measurement spectra (A(λ)) of the medium (3) are determined and those measurement spectra (A(λ)) for which optical saturation has occurred are discarded. For each of the remaining measurement spectra (A(λ)), a medium spectrum (A m(λ)). Using a previously determined reference for a spectrum property to be expected in the absence of interference in a spectral range in which an absorption coefficient of the medium (3) varies by less than a predetermined spectral variance and / or is below a limit value, it is checked whether the measurement spectrum (A(λ)) contains an offset (ΔA) caused by an interference. If an offset (ΔA) is present, the offset (ΔA) is subtracted from the respective measurement spectrum (A(λ)). Finally, the medium spectra (A m (λ)) measured values ​​(mv) of each measured quantity are determined.

A method for controlling light sources of a lighting system includes capturing one or more of illuminance, illuminating spectral properties, color, photometric properties, estimated luminance, reflected light spectral properties, estimated reflected light spectral properties, or estimated reflected light flux for a first location and a second location different from the first location in an environment, setting a target illuminance in the system at the first and second locations, calculating light flux output for one or more lighting elements in the lighting system, and transmitting control instructions based upon the light flux output for adjustment of the one or more lighting elements in the system.

To provide a spectrometry device that is allowed to confirm whether it maintains reproducibility of a measurement result, and to provide an article inspection device having the same.SOLUTION: A spectrometry device 1 measures spectral characteristics of absorbance of a tablet W by operating a light detection section 4 in two modes, namely a first mode for detecting spectral characteristics of light applied from a light source section 3 and a second mode for detecting spectral characteristics of transmission light through the tablet W after being applied from the light source 3. The light detection section 4 can be operated in a third mode for detecting spectral characteristics of transmission light that is applied from the light source section 3 and passes through a test piece TP. A spectral characteristic adjustment section 61 compares spectral characteristics of absorbance of the test piece TP measured at a first period with spectral characteristics of absorbance of the test piece TP measured at a second period later than the first period.SELECTED DRAWING: Figure 2

The invention discloses a controllable preparation method of two-dimensional material bubbles based on ionizing radiation. The method comprises the following steps: firstly, preparing a single-layer two-dimensional material sample through a mechanical stripping and dry transfer process, then irradiating the sample by using a low-energy alpha source, subsequently putting the sample into a temperature control console, and carrying out annealing treatment according to a preset program. Tiny bubbles can appear on the surface of the irradiated two-dimensional material, and after annealing treatment, the tiny bubbles in the material are gradually combined into larger bubbles under the thermal action and are finally stabilized. Through an atomic force microscope and a photoluminescence spectrum, the treated sample can be characterized, and the size, shape and distribution of the bubbles and the influence of local strain introduced by the bubbles on the spectral property of the two-dimensional material are analyzed. According to the novel method for introducing the strain into the two-dimensional material, the two-dimensional material is treated through the ionizing radiation technology and annealing, accurate regulation and control of the size and the form of the bubbles are achieved, and the optical property of the material is remarkably changed.

To provide a spectroscopic measurement device and an article inspection apparatus capable of adjusting an amount of light acquired by a light detection section to an appropriate amount of light.SOLUTION: A spectroscopic measurement device includes: a light source section 3 that irradiates a tablet W with light from a light source 30; and a light detection section 4 that measures a spectral characteristic of transmitted light emitted from the light source section 3 and transmitted through the tablet W with a spectroscope 42. The light source section 3 is configured such that a relative distance D1 to the tablet W is adjustable, and the light detection section 4 is configured such that a relative distance D2 to the tablet W is adjustable.SELECTED DRAWING: Figure 1

A system and method for performing calibration of a measurement module provided to measure spectral characteristics (e.g., spectrum) of a laser beam of a radiation source, where the system includes a reference radiation source, and the method includes calibrating the measurement module using the reference radiation source.

The invention relates to a method for calibrating a spectrometric measuring device (20) using a spectrometric calibration device (01). The calibration device (01) has a control unit, an interferometer with mirrors (02, 03) and a beam splitter (04), a broad-band first radiation source (06), a laser (07) as a second radiation source, and a first detector (08). The method comprises emitting broad-band radiation (12a) and simultaneously emitting radiation (12b) by means of the laser (07), and simultaneously coupling both of these radiations (12a, 12b) into the interferometer of the calibration device. A first interferogram is detected, based on the radiation (12b) of the laser (07). A second interferogram is detected, based on the broad-band radiation (12a). A first data set containing spectral properties of the spectrometric measuring device (20) is created based on the detected interferograms. A second data set, which consists of high-resolution sample spectra and chemically determined constituent values, is provided. Simulated sample spectra are calculated from the two data sets. A chemometric calibration model is created for the measuring device (20) from the simulated sample spectra. The invention also relates to a spectrometric calibration device (01).

The invention proposes an optical measurement method and an achromatic optical apparatus for determining the spatial position of at least one light nano-emitter, a structured object, or a continuous distribution on a sample. The method comprises: the projection of a sequence of at least two compact light distributions of different topological families onto the sample; the detection of the light re-emitted by said at least one light nano-emitter, structured object, or continuous distribution of the sample; the generation of at least one optical image for each light distribution from the detected light; and an algorithm module in which the formulation of the reconstruction of the sample and its spatial and / or temporal and / or spectral properties is considered as an inverse Bayesian problem and leads to the definition of an a posteriori distribution, an a posteriori law combining, by means of Bayes' law,The probabilistic formulation of a noise model, as well as any prior assumptions about a light distribution created in the sample by projection. Furthermore, the invention proposes an optical measurement method and an achromatic optical apparatus in which the algorithm module is configured to estimate the light distribution in the sample using point emitter clouds, thus favoring sparse solutions and estimating the a posteriori mean, and finally representing the results, based on the a posteriori mean, either as an image or as numerical or graphical data. Moreover, the invention proposes an optical measurement method and an achromatic optical apparatus in which the algorithm module is configured so that the a posteriori mean estimation is performed using a Markov Chain Monte Carlo (MCMC) algorithm. Furthermore,The invention proposes an optical measurement method and an achromatic optical apparatus in which the algorithm module is configured to perform a non-regularized MAP algorithm with a positivity constraint, and optionally a frequency-bandwidth limitation constraint, and optionally use a Nesterov-type accelerated numerical scheme,

The present invention discloses a fire smoke particle detection device and method based on scattering differential spectrum. The combination of an aerosol generator and an air pump can simulate a smoke environment and adjust the concentration of smoke particles in the environment to maintain the stability of the smoke environment. A xenon lamp is used as a light source to provide a wide-band spectral output. A reflective spectrometer detects the spectral characteristics of light, and a polarizer and a photoelastic modulator are used to convert the light into linearly polarized light, which is then irradiated on smoke particles to generate scattered light in different directions. The polarizer can receive scattered light in different directions through a rotating base and only allows light with a specific polarization angle to be transmitted to the detector, thereby simulating different smoke particle emission conditions and obtaining corresponding scattered photoelectric signals. Finally, a Labview program is used to deduce the matrix elements of the fire smoke particles, and then the type and particle size of the smoke particles are calculated, so that the present invention has good real-time performance and accuracy.

The invention relates to a method of operating a spectrometer device (110) for obtaining spectroscopy information about at least one object (112), the method comprising in particular evaluating a detector (128) signal by using at least one evaluation unit (136) of the spectrometer device (110), thereby obtaining spectroscopy information about the object (112) therefrom, the evaluation unit (136) is configured for selecting at least one correction information item from a predetermined set of correction information items as a function of an actual value of at least one operating parameter, and for taking into account the selected correction information item to obtain spectroscopy information. The invention further relates to a calibration method for compiling a set of correction information items, a spectrometer device (110) for obtaining spectroscopy information about at least one object (112), a computer program, a computer readable storage medium and a non-transitory computer readable medium. The invention has the advantage that the operating parameters can provide reliable correction parameters, especially under the condition that the ambient temperature is considered. As a result, fluctuations in the spectral flux of the at least one light source (114) and / or fluctuations in the spectral characteristic of the at least one light source (114), in particular deviations, can be compensated.

This invention discloses a detection method and system for detecting tire defects, comprising the following steps: acquiring original image sequences of the tire under four different illumination angles; calculating the normal vector data N and albedo data ρ of the target surface based on the original image sequence using a photometric stereo algorithm and a preset light source direction matrix L; constructing a feature image containing three independent physical dimensions based on the normal vector data N and albedo data ρ: a first feature map representing macroscopic geometric deformation, a second feature map representing the spectral properties of the material, and a third feature map representing microscopic texture deviation; merging the first, second, and third feature maps into multi-channel image data, and using it as input data for training or inference of a deep learning model to output whether the tire has defects and the type of defects; this invention constructs high signal-to-noise ratio input data to determine whether the tire has defects.

The invention relates to a spectrometric measurement method and a measurement device for performing the spectrometric measurement method. The invention relates to a spectrometric measuring method and a measuring device for measuring a measured variable of a liquid medium, in which interferents may occur, including air bubbles, gas bubbles and / or particles, the size of which is larger than a wavelength in the measurement wavelength range. During this process, measurement spectra of the medium are determined and those measurement spectra that have undergone optical saturation are discarded. A media spectrum is determined for each of the remaining measurement spectra. In this case, a test is performed using a predetermined reference of spectral characteristics expected in the absence of an interferent in a spectral range in which the absorption coefficient of the medium varies less than a predetermined spectral variance and / or below a limit value to check whether the measurement spectrum contains an offset caused by the interferent. If there is an offset, the offset is subtracted from the corresponding measurement spectrum. Finally, a measured value for each measured variable is determined using the medium spectrum.

The invention relates to the technical field of data processing, in particular to a Hamiltonian operator local spectrum property analysis method, which comprises the following steps of: acquiring real-time temperature, power consumption and cooling liquid flow of a grid; determining a high temperature difference grid; determining a temporary grid; determining an analysis grid; inputting data to the Hamiltonian operator model; and adjusting the temperature gradient threshold and generating an abnormal property analysis report. Temperature, power consumption and cooling liquid flow data in the quantum computer cooling unit are collected in real time, local spectrum energy eigenvalue analysis is combined, temperature control abnormity can be accurately recognized and adjusted, the stability and efficiency of the cooling unit are improved, the temperature gradient threshold value can be dynamically optimized, and the accuracy of temperature control is improved. Through the generated abnormal property analysis report, potential problems are timely found and maintained, the service life of equipment is effectively prolonged, the utilization of cooling resources is optimized, and the problem of low accuracy of an output result caused by excessive dependence on historical data is effectively solved.

To provide a system and method for operating light from an ambient light source.SOLUTION: An optical device includes a variable optical material capable of responding to stimulus provided by a device to modify at least one of incident ambient light, the spectral component of the incident ambient light and the direction of the incident ambient light through the optical device. The device can sense the intensity and / or spectral characteristics of the ambient light, provide suitable stimulus to various portions of the optical device, activate the variable optical material and modify at least one of the incident ambient light, the spectral component of the incident ambient light and the direction of the incident ambient light.SELECTED DRAWING: Figure 10

The invention relates to a detection method based on airborne multispectral mosaic image spatial-spectral feature extraction, and belongs to the field of unmanned aerial vehicle detection. The method comprises the following steps: taking a low-altitude airborne multispectral mosaic image as input, and carrying out wave band disassembly to obtain an original spectral feature map; performing spatial-spectral feature quantization by applying a multi-dimensional feature operator to generate descriptors, and calculating a correlation matrix by utilizing a Pearson's correlation coefficient; calculating a channel redundancy coefficient, evaluating the importance of each wave band in combination with a spatial-spectral feature descriptor, and extracting spectral features; dynamically determining the grouping number according to the correlation and the spatial-spectral characteristics, and automatically grouping wavebands; spatial continuous features are extracted through small kernel convolution, and discrete spatial features are extracted through grouping convolution; and fusing the multispectral original features, the spectral features and the spatial features through a feature aggregation layer, and inputting the fused features into a detection network to realize target detection. According to the method, the spatial-spectral characteristic information of the multispectral data is fully extracted, and the method has important application value in the aspect of airborne multispectral detection.

A method of operating a lighting device is disclosed for providing power to a light source that has at least two modes of operation. Each mode of operation propagates a beam of light having different spectral characteristics, wherein when the two modes are operated, the total spectral output enhances a visual characteristic of a target within an area surrounding the target. A first mode of the at least two modes is a dulling mode and a second mode of the at least two modes is a vivifying mode.

This invention discloses an end-to-end near-infrared spectral property prediction method for distillate oils. Using Conformer-1D as the backbone network, a multi-task learning framework combining classification and multi-property regression is constructed. Spectral features are extracted through a shared dimensionality-reduced MLP and a residual bottleneck interaction module. Then, classification prior information drives a gating module to allocate multi-expert network weights, achieving weighted fusion prediction of distillate oil properties. Simultaneously, a joint loss function including classification loss, regression loss, and expert load balancing loss is constructed. A three-stage training strategy of classification pre-training, multi-task training, and full-data joint fine-tuning is employed to optimize the model. This invention achieves end-to-end unified modeling for spectral feature extraction and multi-property prediction, fully utilizing category information and property association features, effectively alleviating the label sample imbalance problem, and improving the accuracy and stability of distillate oil property prediction.

The invention discloses a measurement range expansion method of a spectral light field imaging temperature measurement system and an imaging device. The measurement range expansion method of the spectral light field imaging temperature measurement system comprises the following steps: establishing a response model of a temperature measurement system spectral channel through a blackbody furnace calibration experiment; and establishing a target function, and optimizing the established target function to obtain the attenuation slice transmittance of the central wavelength of the channel. The measurement range of the spectral light field imaging temperature measurement system is expanded by obtaining the transmittance of the attenuation sheet with the central wavelength. The method provided by the invention can be suitable for temperature measurement objects with different spectral characteristics, and ensures the consistency of dynamic response of each channel and broadens the measurement range of a temperature measurement system by combining a specified temperature measurement interval and adjusting the transmittance parameter of the attenuation slice.

The invention provides a spatial target material inversion method and device based on spectral characteristics. The method comprises the following steps: screening material BRDF spectral data corresponding to a current spatial target from an established material BRDF spectral library; traversing and calculating relative observation geometric parameters between the subdivision surface element of the space target model and the sun irradiation direction and the sun detection direction; based on the relative observation geometric parameters of the calculation model surface element, screening the BRDF spectral data of the space target material, endowing the BRDF spectral data to the model surface element, and performing simulation calculation by using the established spectral scattering model to obtain a simulation spectrum of the space target; calculating a consistency evaluation value of the simulation spectrum and the actually measured spectrum based on a consistency evaluation model, and if the consistency evaluation value is smaller than a preset threshold value, adjusting the material spectrum data assignment of the current model surface element for re-simulation until the consistency evaluation value is greater than the preset threshold value; and if the consistency evaluation value is greater than a preset threshold value, obtaining a material inversion result of the current space target. According to the scheme, the accuracy of space target material inversion can be improved.

Disclosed is an apparatus for and method of adjusting spectral properties of a laser curtain including a focal position of a laser curtain created by a tunable-wavelength laser with respect to a position of a mass of target material in which the wavelength of the laser radiation output by the tunable-wavelength laser is changed to cause a chromatic shift in the spectral property.

The invention provides a spectral characteristic prediction method based on Tanassen matrix estimation, which adopts a deep learning model to obtain a Tanassen matrix, can quickly predict spectral characteristics and appearance color of a sample under any standard or non-standard illuminant, provides a powerful virtual simulation tool for industrial color matching, quality control, product development and the like, and is suitable for large-scale popularization and application. Actual measurement does not need to be carried out on each lighting condition; that is to say, the invention provides the spectral characteristic prediction method which is rapid, accurate and high in automation degree, and the method can efficiently estimate the complete Tanasenson matrix from limited spectral measurement data, is used for predicting the appearance performance of the material under any illumination, and has very high flexibility and practicability.

Lighting device (10) for emitting light, comprising: - a light source (12, 14, 16, 18) for emitting source light (20), and - an adjustable optical unit (22) which is designed to provide the light to be emitted by the lighting device (10) using the source light (20), wherein the light source (12, 14, 16, 18) is designed to adjust a geometric extent of a light emission surface (26) of the light source (12, 14, 16, 18) emitting the source light (20) and / or a radiation behavior and / or a spectral property of the light source (12, 14, 16, 18) with respect to the source light (20) depending on a light entrance pupil (24) and / or an acceptance angle of the optical unit (22) for the source light (20), characterized in that the light source (12, 14, 16, 18) is designed to adjust the light emission surface (26) and / or the radiation behavior and / or the spectral property depending on a source control signal and is further designed to adjust a luminous flux of the source light (20) independently of the light emission surface (26) and / or the radiation behavior, that the light source (12, 14, 16, 18) has an adjustable source optics unit (32, 34, 36, 38) for adjusting the light emission surface (26) and / or the radiation behavior, that the source optics unit (32, 34, 36, 38) has at least one lens (40, 42, 44) arranged to be movable along an optical axis of the emitted source light (20), at least one adjustable mirror element (46, 54, 56) and / or at least one adjustable diaphragm unit, and the source optics unit (32, 34, 36, 38) further has an adjustable light scattering unit (48).

Systems and methods for detecting physical characteristics of a multilayered tissue of a subject, such as a tear film including analyzing received detector-output indicative of optical properties of light reflected or deflected from the respective multilayered tissue, to determine spectral properties of the multilayered tissue; and determining physical characteristics of the multilayered tissue by using multiple spectral models of the of the multilayered tissue, each model being associated with spectral properties indicative of different tissue characteristics, wherein physical characteristics of the multilayered tissue are determined by hierarchal determination of a best-fit model from the multiple spectral models.

The application discloses a kind of spectral light field imaging temperature measurement system measurement range extension method and imaging device, spectral light field imaging temperature measurement system measurement range extension method includes: the response model of temperature measurement system spectral channel is established by blackbody furnace calibration experiment;Establish target function, and the established target function is optimized, and the attenuation piece transmittance of channel center wavelength is obtained. By obtaining the attenuation piece transmittance of center wavelength, the expansion of spectral light field imaging temperature measurement system measurement range is completed. The method of the application can be applicable to different spectral characteristics of temperature measurement object, combined with specified temperature measurement interval, by adjusting attenuation piece transmittance parameter, the consistency of the dynamic response of each channel is guaranteed, and the measurement range of temperature measurement system is widened.

A system and method of measuring one or more spectral properties, such as the wavelength and / or bandwidth of a beam of deep ultraviolet excimer laser radiation, in which an instrument used to measure the one or more spectral properties is calibrated using an absolute reference generated using Doppler-free spectroscopy techniques. Systems and methods in which the isotope concentrated material is used are also disclosed.

The invention relates to a spectrometer device (110) for obtaining spectroscopy information about at least one object (112), the spectrometer device (110) comprising: at least one light source (114) configured for generating illumination light (116) for illuminating the object (112), the light source (114) comprises at least one light emitting diode (118) and at least one luminescent material (120) for light conversion of primary light generated by the light emitting diode (118); ii. At least one detector (128) for detecting the light to generate at least two reference signal sums at at least two different reference wavelengths; and iii. At least one evaluation unit (136) configured for evaluating at least one spectral detector signal (176) generated by the at least one detector (128) by detecting the detection light from the object (112) in order to obtain spectroscopic information about the object (112), the evaluation unit (136) is further configured to determine at least one item of temperature information from the reference signal sum and to take into account the item of temperature information when the spectroscopy information is obtained. The invention further relates to a method (242), a computer program, a computer readable storage medium and a non-transitory computer readable medium. The invention has the advantage that the temperature information item from the reference signal sum can provide reliable correction parameters. As a result, fluctuations in the spectral flux of the at least one light source (114) and / or fluctuations in the spectral characteristic of the at least one light source (114), in particular deviations, can be compensated.

The invention proposes an optical measurement method and an achromatic optical apparatus for determining the spatial position of at least one light nano-emitter, a structured object, or a continuous distribution on a sample. The method comprises: the projection of a sequence of at least two compact light distributions of different topological families onto the sample; the detection of the light re-emitted by said at least one light nano-emitter, structured object, or continuous distribution of the sample; the generation of at least one optical image for each light distribution from the detected light; and an algorithm module in which the formulation of the reconstruction of the sample and its spatial and / or temporal and / or spectral properties is considered as an inverse Bayesian problem and leads to the definition of an a posteriori distribution, an a posteriori law combining, by means of Bayes' law,The probabilistic formulation of a noise model, as well as any prior assumptions about a light distribution created in the sample by projection. Furthermore, the invention proposes an optical measurement method and an achromatic optical apparatus in which the algorithm module is configured to estimate the light distribution in the sample using point emitter clouds, thus favoring sparse solutions and estimating the a posteriori mean, and finally representing the results, based on the a posteriori mean, either as an image or as numerical or graphical data. Moreover, the invention proposes an optical measurement method and an achromatic optical apparatus in which the algorithm module is configured so that the a posteriori mean estimation is performed using a Markov Chain Monte Carlo (MCMC) algorithm. Furthermore,The invention proposes an optical measurement method and an achromatic optical apparatus in which the algorithm module is configured to perform a non-regularized MAP algorithm with a positivity constraint, and optionally a frequency-bandwidth limitation constraint, and optionally use a Nesterov-type accelerated numerical scheme,

To provide a guide light irradiation device which has a smaller number of components, and which can be easily manufactured.SOLUTION: A guide light irradiation device radiates guide light for showing a direction to a survey setting worker. An optical system of the guide light irradiation device includes an irradiation lens 12, a spectral plate 15, and a light source 14. The light source is a broadband light source for emitting light in a broadband. At the spectral plate, a color developing element 17 is formed. The color developing element includes at least two regions 17a, 17b whose spectral characteristics are different. One of the spectral plate and the light source is constituted so as to be positioned in a focal position of the irradiation lens or in the vicinity of the focal position, or the other is constituted so as to be positioned in the vicinity of the focal position of the irradiation lens or in the focal position, and the light emitted from the broadband light source is colored according to the region, and is radiated from the irradiation lens as guide light 18 including light of at least two colors.SELECTED DRAWING: Figure 2