5482 results about "Wavelength range" patented technology

The invention discloses a product detection method and system based on machine vision, and relates to the technical field of machine vision, and the method comprises the steps: initializing an ambient light sensor, evaluating an initial illumination condition, and dynamically adjusting a light source parameter to verify and lock an optimal setting; selecting a preset wavelength range to configure a spectral imaging system to collect image data according to the characteristics of the building material, performing primary processing and image synthesis to obtain a comprehensive spectral image, and performing feature extraction to obtain a high-quality image data set; preprocessing an image data set on edge equipment, deploying a deep learning model to carry out preliminary defect detection, identifying and marking defect types, and extracting local and frequency domain features; and refining defect types by using a classification algorithm according to the preliminary detection result, integrating a final classification result and image data, and transmitting to a cloud to complete detection. According to the invention, high-precision and high-efficiency product defect detection is realized.

A variable-wavelength light emitting diode (LED) is provided. The variable-wavelength LED comprises an n-doped portion, a p-doped portion, and a light-emitting region located between the n-doped portion and the p-doped portion. The light-emitting region comprises a light-emitting layer which emits light at a peak emission wavelength under electrical bias thereacross. The LED is configured to receive a power supply, and the peak emission wavelength of the LED is continuously controllable over an emission wavelength range of at least 40 nm by varying the power supply. A display device comprising this variable-wavelength LED, a method of controlling said variable-wavelength LED and a method of manufacturing a variable-wavelength LED are also provided.

A display apparatus with high display quality is provided. The display apparatus includes a first light-emitting device, a second light-emitting device, a first coloring layer, a second coloring layer, and a first insulating layer. The first light-emitting device includes a first pixel electrode over the first insulating layer, a first EL layer over the first pixel electrode, and a common electrode over the first EL layer. The second light-emitting device includes a second pixel electrode over the first insulating layer, a second EL layer over the second pixel electrode, and the common electrode over the second EL layer. The first coloring layer is provided to overlap with the first light-emitting device. The second coloring layer is provided to overlap with the second light-emitting device. The first coloring layer and the second coloring layer transmit light of different wavelength ranges. The first insulating layer includes a depressed portion between the first pixel electrode and the second pixel electrode. A third EL layer is provided in the depressed portion of the first insulating layer. The first EL layer, the second EL layer, and the third EL layer contain the same material. The sum of the thickness of the first pixel electrode and the depth of the depressed portion is larger than the thickness of the third EL layer.

The invention discloses a compensation method based on ultraviolet-visible spectrum interaction interference, which relates to the technical field of spectral analysis, and comprises the following steps: acquiring ultraviolet-visible spectrum data of turbidity, COD, nitrate single gradient solution and mixed solution of the turbidity, COD and nitrate single gradient solution, and preprocessing the data; constructing a mapping relation model of the turbidity and the spectral data; for spectral data within the wavelength range of 260-320nm, calculating interactive interference data, establishing a relationship between the turbidity and the interactive interference data, and performing interactive interference compensation and spectral analysis; for the spectral data in the wavelength range of 220-260nm, constructing a COD and spectral data relation model, and calculating interactive interference data; and based on the interactive interference data characteristics, establishing a regression model, analyzing the relationship between the interference spectrum characteristics and other substances, and performing interactive interference compensation and spectral analysis. According to the method, the resolution of the spectral signal is remarkably improved, the reliability of data analysis is improved, and the method has a wide application prospect.

The invention discloses a C4F7N gas optical fiber Fabry-Perot sensor, a sensitivity demodulation system and a sensitivity demodulation method, belongs to the technical field of C4F7N gas detection, and solves the problem of how to improve the sensitivity of the C4F7N gas optical fiber Fabry-Perot sensor. A Fabry-Perot cavity is formed by a gap between the end face of a single-mode optical fiber of the C4F7N gas optical fiber Fabry-Perot sensor and the surface of a groove; emergent light of the single-mode optical fiber is reflected by the surface of the groove, and the groove converges the reflected light, so that the loss of the reflected light is reduced, and the detection sensitivity of the sensor is improved; the sensor is simple in structure, small in size and high in reliability; according to the sensitivity demodulation system, the resonant wavelength drift direction is judged based on a twice multi-frequency correlation demodulation method, and then the sensitivity of the sensor is represented according to a peak value tracking method; the cavity length of the sensor can be demodulated by only one enveloped wavelength range, so that the requirement on the bandwidth of a light source is reduced, and the equipment investment cost is reduced.

The invention relates to the technical field of spectral analysis, in particular to an intelligent spectral pesticide residue detection system which comprises a spectral data acquisition module, a spectral feature analysis module, a pesticide spectral feature classification module, a spectral matching weight optimization module and a pesticide residue concentration analysis module. In the invention, by collecting spectral signals of a pesticide sample in different wavelength ranges and combining time, space and frequency dimension information, the comprehensiveness of data collection is ensured, spectral data is analyzed in multiple dimensions, mutation features are extracted, associated frequency bands are identified, angle deviation is eliminated, and the accuracy and reliability of spectral features are improved; classification is performed according to spectral distribution differences and change rates, detection resolution is improved, spectrum matching rules are optimized, high-contribution wavebands are screened, detection accuracy is improved, concentration normalization analysis is combined, key feature contribution values are adjusted, misjudgment risks are reduced, optical paths are optimized, optical loss is reduced, signal acquisition stability is improved, and adaptability of a detection system is enhanced.

The invention discloses a detection method and system for a flue gas analyzer, and the method comprises the steps: carrying out the spectrum scanning of flue gas through a multispectral detector according to the spectral characteristics of the flue gas, and obtaining the reflection and transmission spectrum data of the flue gas in a plurality of wavelength ranges; establishing an abnormal value detection model by using an ensemble learning algorithm according to the spectral data so as to process the spectral data; analyzing the processed spectral data in real time, and identifying smoke components and concentration data thereof; a dynamic adaptability correction model is constructed according to real environment conditions, historical flue gas components and concentration data of the historical flue gas components so as to correct the concentration data of the identified flue gas components in real time, and the working state of the multispectral detector is adjusted through a feedback control unit; and monitoring data of a related environment where the flue gas is located, and integrating the corrected flue gas component and concentration data and the related environment data by using a data fusion algorithm to generate a flue gas analysis report. By utilizing the embodiment of the invention, the flue gas components can be monitored in real time, the defects of a traditional analysis instrument in the aspects of data processing and correction are overcome, and the accuracy and reliability of flue gas analysis are improved.

This disclosure relates to an intermediate substrate (10) for the fabrication of a semiconductor substrate, comprising successively: a first semiconductor layer (2), a first thermal barrier layer (5), a support (13) comprising an absorption layer (3) configured to absorb laser radiation in a predetermined wavelength range, the temperature of the absorption layer (3) increasing during absorption, and a separation zone (8) adjacent to the absorption layer (3) and configured to thermally degrade under the effect of the temperature increase of the absorption layer, so as to separate at least a portion of the support (13) from the remainder of the intermediate substrate (10). (Shortcut figure: Fig. 1)

The invention belongs to the technical field of camouflage materials, and particularly relates to a natural vegetation imitating visible light-laser-infrared compatible camouflage film. Comprising a substrate, a thermal infrared dual-band camouflage and near infrared spectrum regulation and control layer and a visible light-laser-near infrared regulation and control layer which are arranged in sequence. The upper-layer natural vegetation imitating structure is mainly used for simulating spectral characteristics of natural vegetation, and meanwhile, the extremely low reflectivity at the position of 1.06 mu m near-infrared laser wavelength is achieved by controlling the thickness of a film layer; the thermal infrared camouflage structure in the middle realizes low emissivity of medium-wave infrared and long-wave infrared; the substrate provides a bearing function. The multilayer film not only can realize refined simulation of a reflection spectrum of natural vegetation in a visible light-near infrared wavelength range, but also has the functions of adjusting different visible light spectrum colors and resisting an infrared detector and a 1.06 [mu] m laser detector; and a visible light-laser-infrared multi-band compatible camouflage performance covering a wide wavelength range of 0.4-14 microns can be realized.

The purpose of the present invention is to provide a technique for optically quantifying a compound of which a color does not change due to oxidative degradation.　Another aspect of the present invention provides a method for diagnosing oil characteristics, the method being characterized by: using an optical sensor having a light source and a detector that detects light emitted from the light source to acquire an absorption spectrum in a wavelength range of 800 nm to 3000 nm of an oil containing an additive having a maximum molar absorption coefficient value of 50 or less in the ultraviolet visible wavelength range of 250 nm to 800 nm; and inputting data based on the absorption spectrum into an estimation model implemented in an information processing device to predict the concentration of the additive.

The invention belongs to the technical field of fruit and vegetable nutritional ingredient analysis, and discloses a grading evaluation system model-oriented high-quality fruit and vegetable nutritional ingredient detection method, which comprises the following steps of: obtaining a near infrared spectrum curve of a fruit and vegetable sample; according to the absorption wavelength ranges corresponding to different nutritional ingredients, calculating a maximum concentration preliminary estimation value of the nutritional ingredients corresponding to the absorption peaks; obtaining the maximum concentration calibration value of the target absorption peak according to the longitudinal offset and the transverse offset of the target absorption peak; obtaining a maximum concentration estimation value by combining the maximum concentration initial estimation value; performing regional division on the target absorption peak, and calculating regional component confusion scales of similar fluctuation regions to obtain adaptive decomposition scales of different regions; decomposing the near infrared spectrum curve to obtain contribution degrees corresponding to different nutritional ingredients; and combining the maximum concentration estimated value to obtain the actual concentration of different nutritional ingredients of the fruits and vegetables, and completing grade division, thereby completing detection. According to the invention, accurate nutritional ingredient detection of high-quality fruits and vegetables is realized.

A metamaterial includes a plurality of films arranged with main surfaces thereof facing each other, a plurality of micro-resonators included in the plurality of films, and a stress relieving member disposed between two mutually-adjacent films of the plurality of films. The plurality of films transmit a target electromagnetic wave that is an electromagnetic wave having a wavelength within a target wavelength range. The plurality of micro-resonators resonate with the target electromagnetic wave. The stress relieving member transmits the target electromagnetic wave and has a lower elastic modulus than the plurality of films.

The invention provides a method for carrying out corn quality seed selection by using a hyperspectral imaging technology, and belongs to the technical field of corn quality seed selection. Corn kernels are subjected to spectrum scanning in a wavelength range of 400nm to 2500nm, spectrum data are preprocessed through a continuous wavelet transform algorithm, baseline drift and noise interference are removed, and a high-quality seed selection result is obtained. And accurately extracting spectral characteristic peaks of protein, starch, grease and moisture. And establishing a characteristic peak distribution matrix to record peak intensity distribution, and calculating a characteristic peak intensity weight coefficient and a position offset. And constructing a characteristic peak quality incidence matrix, establishing a numerical mapping relationship between the spectral characteristics and the quality parameters, and obtaining a peak width parameter and a spectral noise level. The spectral quality fusion function is adopted to process the multi-dimensional characteristic parameters, and the comprehensive quality evaluation index and the single quality evaluation index are calculated, so that the technical problem that the multi-dimensional quality characteristics of the corn kernels cannot be accurately identified and accurately graded is solved.

A method of controlling an LED display device comprising an variable-wavelength LED comprises the steps of: providing a power supply to the variable-wavelength LED; and controlling the power supply to vary the peak emission wavelength of the LED within the emission wavelength range. A method of controlling a display device to reproduce a particular spectrum of light is provided.

The invention discloses a light source color preference degree evaluation method and device, equipment and a storage medium, and relates to the technical field of light source quality testing. The method comprises the following steps: acquiring a color temperature parameter of a test light source and spectral power distribution in a preset wavelength range, acquiring an associated reference light source based on the color temperature parameter, and calculating reference spectral power distribution; a color quality index is then calculated based on the plurality of test color samples according to the color temperature parameter, the spectral power distribution, and the reference spectral power distribution. Calculating a color gamut space area formed by the test color sample under the test light source according to the spectral power distribution, calculating a color resolution index according to the color gamut space area, and finally calculating a color preference index of the test light source according to the color quality index and the color resolution index. Therefore, the color preference index is calculated according to the color temperature parameter and the reference light source, the calculation process is associated with visual feelings such as visual discrimination, and a basis is provided for accurate evaluation or comparison of the color development quality of different color temperature test light sources through quantitative calculation of the color preference.

An optical tactile sensor comprising a contact part having a contact surface that comes into contact with an object, the contact part being deformed in response to a contact state of the object with respect to the contact surface; a marker disposed on the contact part, and configured to be displaced in response to deformation of the contact part; and an imaging unit configured to capture an image of the marker from a side opposite to a side where the object comes into contact, wherein the contact part allows light in a first wavelength range to pass therethrough, and blocks light in a second wavelength range different from the first wavelength range, the marker reflects light that is incident on the marker from the opposite side, and the imaging unit receives the light reflected by the marker and the light in the first wavelength range, and generates an image.

A hybrid laser is provided having a tuning structure that alters a wavelength range of an amplified lightwave in a micro-ring resonator (MRR). The tuning structure alters an index of refraction of a tuned ring resonator to alter the index of refraction.

A composite radiative cooling material includes a first layer including a reflective material, a second layer including a porous material, and a third layer including an emissive material. The optical properties of the respective materials and the arrangement of the respective layers cause the radiative cooling material to exhibit a total solar reflectance greater than 85%, and a thermal emissivity greater than 85% in a wavelength range of 8 to 13 μm. The layers may be in a vertically stacked arrangement, with the third layer capable of directly facing the sky when the composite radiative cooling material is installed for cooling a load, the second layer arranged under the third layer, and the first layer arranged under the second layer. The composite radiative cooling material may be thermally coupled to a cooling load to provide radiative cooling to the cooling load.

A radiative cooling device that is in a state in which a radiative surface is colored is provided. A radiative cooling device CP includes an infrared radiative layer A that radiates infrared light IR from a radiative surface H, a light reflective layer B that is disposed on the side opposite to the radiative surface H with respect to the infrared radiative layer A, and a color portion X. The infrared radiative layer A is a resin material layer J that has a thickness adjusted so as to emit a heat radiation energy greater than an absorbed solar energy in a wavelength range from 8 μm to 14 μm, and the color portion X contains a colorant that absorbs light in the visible range.

The invention relates to the technical field of optical elements, in particular to an optical filter applied to a medical communication sapphire window. The optical filter comprises a substrate, a main film system, a secondary film system and a metal film system, the main film system is located on one side of the substrate, the secondary film system is located on the other side, opposite to the main film system, of the substrate, the metal film system is located on the upper side of the main film system, the secondary film system is located on the other side, opposite to the main film system, of the substrate, and the metal film system is located on the lower side of the main film system. The main film system comprises four high-refractive-index film layers and four low-refractive-index film layers which are sequentially and alternately overlapped from the substrate to the outside according to the structure of the main film system, and the secondary film system comprises four high-refractive-index film layers and four low-refractive-index film layers which are sequentially and alternately overlapped from the substrate to the outside according to the structure of the secondary film system. The metal film system comprises three layers of Ti, Ni and Au metal film layers which are sequentially and alternately overlapped from the main film system to the outside according to the structure of the metal film system, and the optical filter can realize high transmittance and uniform signal intensity within the wavelength range of a communication channel of 1200-1700 nm, so that high communication efficiency is realized.

The invention relates to the technical field of laser ranging, in particular to a double-optical-comb hybrid ranging device which comprises a signal detection optical path system and a signal demodulation optical path system. Wherein the signal detection optical path system comprises a first optical frequency comb, a first optical isolator, a first optical collimator, a first beam splitter prism, a reference mirror, a Faraday rotator, a convergence mirror and a target reflector; the signal demodulation optical path system comprises a second optical frequency comb, a second optical isolator, a second optical collimator, a half-wave plate, a second beam splitter prism, a third beam splitter prism, a first polarization controller, a first photoelectric detector, a reflector, a polarization beam splitter prism, a second polarization controller and a second photoelectric detector. A third polarization controller; and a third photoelectric detector. According to the invention, three ranging technologies of asynchronous optical sampling ranging, multi-heterodyne interference ranging and synthetic wavelength ranging are fused, and the problem that a large ranging range and high ranging precision cannot be simultaneously considered in the ranging process is solved.

The invention provides a light generating system (1000) configured to generate system light (1001), wherein the light generating system (1000) comprises a first light generating device (110), wherein: (A) the first light generating device (110) comprises a first light source (10) and a first luminescent converter (210); (B) the first light source (10) comprises a solid state light source, wherein the first light source (10) is configured to generate first light source light (11) having a first light source centroid wavelength (λS, 1) selected from the range of 380-420 nm; (C) the first luminescent converter (210) is configured to convert at least part of the first light source light (11) into first converter light (211) having a first converter centroid wavelength (λc, 1) selected from the green-yellow wavelength range; (D) the first light generating device (110) is configured to generate first device light (111) having a spectral power distribution in the wavelength range of 380-780 nm with at least 60% of the spectral power provided by the first light source light (11) and at maximum 40% of the spectral power provided by the first converter light (211).

The invention relates to the technical field of power system equipment state monitoring and fault diagnosis, and discloses an arc light online monitoring method and system based on a spectrum sensing technology, and the method comprises the steps: arranging a first spectrum sensor and a second spectrum sensor corresponding to a detected target, and respectively detecting optical signals in different wavelength ranges; collecting optical data according to a set period, and identifying abnormal features according to a preset template; when the double abnormal features exist, the duration of the double abnormal features is calculated, and if the duration exceeds the corresponding reference duration, a duration reference value is generated; and performing weighted calculation on the time length analysis value, if the time length analysis value is within a preset range, giving a partial discharge abnormal prompt, and resetting the reference value. Multi-wavelength spectrum monitoring is utilized, non-contact and high-sensitivity detection of partial discharge is achieved, electrical equipment is prevented from being damaged, fault hidden dangers are found in time, and safe and stable operation of the equipment is guaranteed.

The invention provides a diamine monomer and a preparation method thereof, and a polyimide material and a preparation method and application thereof. The structural formula of the diamine monomer is shown as a formula I, and the diamine monomer is a functional diamine monomer containing a beta-hydroxy ketone structure and has excellent ultraviolet absorption performance. A functional diamine monomer A containing a beta-hydroxy ketone structure, a diamine monomer B with atomic oxygen resistance and a diamine monomer C are matched to be used as diamine monomers, the diamine monomers and a dianhydride monomer are polymerized together, and the polyimide material is obtained after imidization and other process treatment. The ultraviolet radiation resistance and the atomic oxygen radiation resistance are excellent. Tests show that after the polyimide fiber prepared by the method is irradiated by ultraviolet (the wavelength range is 280-400nm and the irradiation intensity is 15W / m < 2 >) for 2000h and is irradiated by atomic oxygen of 5 * 10 < 20 > atoms * cm <-2 >, the breaking strength retention rate is more than 80%, and the maximum breaking strength retention rate is up to 95.4%.

A display apparatus with a high aperture ratio is provided. The display apparatus includes a first pixel, a second pixel, a first coloring layer, a second coloring layer, a first conductive layer, a second conductive layer, and a first insulating layer. The first pixel includes a first pixel electrode, a first EL layer over the first pixel electrode, and a common electrode over the first EL layer. The second pixel includes a second pixel electrode, a second EL layer over the second pixel electrode, and the common electrode over the second EL layer. The second pixel is placed to be adjacent to the first pixel. The first coloring layer is placed to overlap with the first pixel. The second coloring layer is placed to overlap with the second pixel. The wavelength range of light that the second coloring layer transmits is different from a wavelength range of light that the first coloring layer transmits. The first conductive layer is placed over the common electrode. The first insulating layer is placed over the first conductive layer. The second conductive layer is placed over the first insulating layer. One or both of the first conductive layer and the second conductive layer overlap with a region interposed between the first EL layer and the second EL layer. A side surface of the first EL layer and a side surface of the second EL layer are placed to face each other.

The invention relates to the technical field of metal surface treatment monitoring, and discloses a black titanium surface coloring intelligent monitoring system, which comprises a spectrum acquisition module, an environment disturbance acquisition module, an environment disturbance comparison module and the like. The spectrum acquisition module dynamically adjusts a sampling frequency and a wavelength range in combination with environmental disturbance parameters; the environment disturbance acquisition module acquires information such as a temperature gradient change rate and an environment humidity fluctuation rate, and the environment disturbance comparison module generates a comprehensive index according to the information and judges an environment disturbance level. And the equipment state acquisition and comparison module monitors internal operation parameters of the system, generates an equipment health index and deals with abnormity. The spectrum and model synchronization module matches and evaluates the coloring quality by using wavelet transform and a pre-training model, and the coloring abnormity analysis module identifies defects. In addition, the system is also provided with a dynamic calibration module. The system can accurately monitor black titanium surface coloring, and the production efficiency and the product quality are improved.

The invention discloses a multispectral pixel structure and an image sensor, the pixel structure comprises a pixel array, the pixel array comprises a plurality of modules arranged in an array, each module comprises M * N color filters and M * N micro lenses, and the transmission wavelength ranges and corresponding transmittances of part or all of the M * N color filters are different from each other; wherein one or more first wavelength color filters transmitting the first wavelength range exist in the M * N color filters, the transmittance of the first wavelength color filters is larger than that of the non-first wavelength color filters, and the area of the first wavelength color filters is smaller than that of the non-first wavelength color filters; and / or a plurality of Kth wavelength color filters transmitting the Kth wavelength range exist in the M * N color filters, the transmittance of the Kth wavelength color filters is smaller than that of the non-Kth wavelength color filters, the area of the Kth wavelength color filters is larger than that of the non-Kth wavelength color filters, M is larger than or equal to 2, N is larger than or equal to 2, and M and N are integers. Pixel structure design is carried out according to the transmittance condition of the color filters, color crosstalk can be reduced, the process manufacturing difficulty of the image sensor is reduced, the image sensor is particularly suitable for color temperature detection, and through the reasonable arrangement design of the multiple color filters, the color temperature detection with the wider warm and cold range and more real can be provided.

Provided is a processing method with which it is possible to efficiently process an organic fluorine compound contained in a processing target liquid.　This processing method for processing an organic fluorine compound contained in a processing target liquid comprises: a step (a) for supplying electrons in and through the processing target liquid between a first electrode and a second electrode disposed apart from the first electrode; and a step (b) for, while said step (a) is being executed, irradiating the processing target liquid with ultraviolet rays exhibiting light emission intensity at least in a wavelength range of 200 nm or less.

An apparatus determines exposure settings of an imaging apparatus that shoots a subject in relation to light of two types of wavelength ranges. The apparatus obtains a result of photometering in relation to light of a first wavelength range and light of a second wavelength range, determines, based on the result of photometering for the first wavelength range, first exposure settings for shooting in relation to the first wavelength range, and determines, based on the result of photometering for the second wavelength range and on the first exposure settings, second exposure settings for shooting in relation to the second wavelength range. The settings include a diaphragm value, and the apparatus determines a second diaphragm value for the second exposure settings, the second diaphragm value achieving a larger aperture than a first diaphragm value for the first exposure settings.

InxAlyGa1-x-yN semiconductor structures having optoelectronic elements characterized by epitaxial layers having different in-plane a-lattice parameters and different InN mole fractions are disclosed. The active regions are configured to emit radiation in different wavelength ranges and are characterized by strain states within about 1% to 2% of compressive strain. The epitaxial layers are grown on patterned InxAlyGa1-x-yN seed regions on a single substrate, where the relaxed InGaN growth layers provide (0001) InxAlyGa1-x-yN growth surfaces characterized by different in-plane a-lattice parameters and different InN mole fractions. InxAlyGa1-x-yN semiconductor structures can be used in optoelectronic devices such as in light sources for illumination and in display applications.