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181 results about "Spectral transmittance" patented technology

Spectral Transmittance (ST) For very thin films, spectral transmittance (ST) measurements are an alternative and less expensive way to measure thickness.

Underwater image enhancement method based on water diffusion physical model

The invention provides an underwater image enhancement method based on a water diffusion physical model, and relates to the technical field of underwater image enhancement, and the method comprises the steps: S101, inputting a local block of an underwater image to a convolutional neural network, and predicting an attenuation coefficient matrix and a diffusion matrix of a water body; s102, constructing a water diffusion control equation based on the attenuation coefficient matrix and the diffusion matrix of the water body; s103, performing multi-scale diffusion on the underwater image in a frequency domain based on a water diffusion control equation to obtain a reconstructed image; s104, recovering a color channel of the reconstructed image through a spectral transmittance model to obtain an enhanced image; and S105, outputting an enhanced image. According to the method, by estimating the attenuation and scattering coefficients of the light underwater, image enhancement which better conforms to the physical diffusion characteristics of the light underwater is achieved, color distortion and image blurring are effectively avoided, and the physical interpretability and reliability of an enhancement result are improved.
Owner:SANYA INST OF OCEANOGRAPHY OCEAN UNIV OF CHINA

Printing color closed-loop control system based on spectral analysis

The invention discloses a printing color closed-loop control system based on spectral analysis, and relates to the technical field of computer processing, and the system comprises the following steps: S01, collecting the spectral reflectivity data of a plurality of key color blocks on a printed matter measurement and control strip in real time through an online high-speed spectrometer at the frequency of not less than 100 color blocks per second; s02, constructing a color prediction model, wherein the model receives the spectral reflectivity data and outputs absorption scattering characteristics, the spectral transmittance of ink and dot expansion, trapping and overprinting effects in the printing process; s03, setting a dynamic tolerance threshold value delta Et based on a chromatic aberration formula according to the color precision requirement of the printed matter, and judging the absorption and scattering characteristics, the spectral transmittance of the ink and a grading tolerance interval in which the dot expansion, trapping and overprinting effects in the printing process are consistent with visual perception; and S04, converting the spectral reflectivity data acquired in real time into a CIELAB color space irrelevant to equipment, and comparing the spectral reflectivity data with a preset standard color target value. According to the method, the problems of different standards and color drift caused by artificial experience difference and visual fatigue are solved.
Owner:HANGZHOU DEKA DECORATION NEW MATERIAL CO LTD

Plastic base material and plastic eyeglass lens

A plastic base material having a high transparency while having ultraviolet cutting, blue light cutting, and anti-glare functions and a plastic eyeglass lens comprising such a plastic base material are provided. A translucent plastic base material comprises a resin and an absorbing dye, wherein in a spectral transmittance curve, a half-value wavelength on the short-wavelength side at which a transmittance is 50% is 410 to 430 nm, an average transmittance at 440 to 480 nm is 60 to 90%, an average transmittance at 500 to 530 nm is 75 to 95%, an average transmittance at 630 to 700 nm is 80 to 98%, and there is a local minimum between 550 and 600 nm.
Owner:HOPNIC LABORATORY CO LTD

Cover sheet, steel structure, and method for repairing steel structure

To provide a UV-resistant cover sheet for covering steel materials and the like of steel structures located outdoors, a steel structure with the cover sheet, and a method for repairing the steel structure.SOLUTION: Provided is a cover sheet used for covering steel materials, the cover sheet including a barrier layer, a design layer, and a weather-resistant layer, and having a maximum spectral transmittance of 1.0% or less in the wavelength range of 300 nm or more to 350 nm or less.SELECTED DRAWING: Figure 2A
Owner:DAI NIPPON PRINTING CO LTD

Textile color fastness washing liquor staining degree intelligent rating system and rating method

The invention discloses a textile color fastness washing liquor staining degree intelligent rating system, which comprises an equipment main body, a touch screen and a PC terminal, and is characterized in that a washing liquor test vessel is placed in the equipment main body; a touch screen is arranged on the equipment main body, and the equipment main body is also connected with the PC terminal; a light splitting test module is arranged in the equipment main body, and the test module is used for collecting spectral transmittance information of different wavebands of the washed soap liquid and the washed soap liquid, and converting color information through the information; both the touch screen and the PC terminal are provided with conversion rating modules; the conversion rating module is used for calculating a color difference delta E00 and a brightness difference delta L00 according to CIEDE2000, performing data conversion on a gray sample card GB / T251 for evaluating staining, and establishing a mathematical model for staining rating of the washing liquor; and automatically rating the staining degree of the textile color fastness washing liquor by the mathematical model for the staining rating of the washing liquor according to the calculated color difference delta E00 and lightness difference delta L00. According to the invention, the staining degree of the clothing textile color fastness washing liquid can be automatically graded, and the detection is faster and more accurate.
Owner:WENZHOU INST OF TECH TESTING & CALIBRATION

Water quality detection method based on transmission spectrum analysis and electronic equipment

The invention discloses a transmission spectrum analysis-based water quality detection method and electronic equipment, and the method comprises the following steps: carrying out data dimension reduction on a spectral transmittance data set to obtain a dimension-reduced sample data set; the original threshold value and the original weight of the BP neural network serve as the initial population position of the improved starfish optimization algorithm for optimization, and the optimal threshold value and the optimal weight of the BP neural network are obtained; and training a water quality detection model composed of the BP neural network with the optimal threshold and the optimal weight and the feature extraction module by using the sample data set after dimension reduction, and detecting the water quality by using the water quality detection model which is qualified in training. According to the method, the BP neural network optimized by the improved starfish optimization algorithm is adopted for water quality detection, and the condition of water quality can be accurately detected.
Owner:NANCHANG INST OF TECH

Optical filter

To provide an optical filter with high transmittance of visible light and high blocking of near-infrared light capable of suppressing ripples even at high angles of incidence while suppressing the change in blocking ability at high incidence angles of near-infrared light.SOLUTION: The optical filter includes: a substrate; and a dielectric multilayer film laminated on at least one of the main surfaces of the substrate. The substrate has at least one layer of a resin film containing a dye (IR) and a resin with a total thickness of 0.3 to 20 μm. The optical filter is an optical filter that satisfies the spectral transmittance curve at incidence angles of 0 degrees, 5 degrees, and 40 degrees satisfies all of the specific optical characteristics (i-1), (i-2), (i-4), (i-7) to (i-10).SELECTED DRAWING: Figure 1
Owner:AGC INC

High-strength impact-resistant photoelectric glass material as well as preparation method and application thereof

The invention provides a high-strength impact-resistant photoelectric glass material, a preparation method of the high-strength impact-resistant photoelectric glass material and an application of the high-strength impact-resistant photoelectric glass material. The invention discloses a high-temperature-resistant glass which comprises or consists of the following components: 50 to 60 percent of SiO2, 0.1 to 5 percent of Bi2O3, 1 to 5 percent of Li2O, 10 to 16 percent of Na2O, 0 to 1 percent of K2O, 1 to 5 percent of B2O3, 12 to 18 percent of Al2O3, 1 to 7 percent of ZrO2, 1 to 4 percent of MgO, 1 to 3 percent of CaO, 0.1 to 3 percent of CeO2 and 0 to 2 percent of Sb2O3. The photoelectric glass material has the advantages of excellent spectrum transmittance, good anti-halation and anti-crosstalk performance, high baking temperature resistance, good chemical strengthening property, and good bending resistance and falling ball impact resistance after chemical strengthening. The composite material can be used for preparing a display screen and a protective cover plate, and plays an important role in the aspects of smart phones, tablet personal computers, notebook computers, smart watches, vehicle-mounted applications, public inquiry systems, ATMs, song and dish ordering systems, industrial control, medical treatment and the like.
Owner:CNBM PHOTONICS TECH CO LTD

Optical sheet, sheet article, polarizing plate, touch panel member, display device, method for selecting optical sheet, and method for manufacturing optical sheet

This optical sheet includes a first surface and a second surface facing the first surface. The optical sheet includes a base material layer and a functional layer in order from the second surface to the first surface. The functional layer includes a cured product of a curable resin composition, and an ultraviolet absorber. The spectral transmittance at a wavelength of 380 nm is 1% or less. The spectral transmittance at a wavelength of 440 nm is 70% or more. An indentation hardness HA1 at a first position in a cross section of the functional layer, an indentation hardness HA2 at a second position in the cross section of the functional layer, and an indentation hardness HA3 at a third position in the cross section of the functional layer satisfy the following relationships. The first position is located in a surface layer part close to the first surface in the cross section. The third position is located in a surface layer part close to the second surface in the cross section. The second position is located midway between the first position and the second position. HA3 < HA2 < HA1 HA1 / HA2 ≤ HA2 / HA3
Owner:DAI NIPPON PRINTING CO LTD

Color image sensor, method and system

PendingCN121058255AColor imageSpectral response
The noise performance of the image sensor is improved by using hundreds of pixel-to-pixel comparisons that all contribute to information about a given pixel. This allows accurate determination of image chromaticity even at extremely low signal-to-noise ratios. In other embodiments, filters of a non-conventional spectral transmittance function are employed to reduce metamerism, enabling resolution of scene information that is not visible to the human eye. Yet other embodiments relate to manufacturing a sparse matrix of transparent pedestals on an array of image photosensors. When a color resist is applied thereafter, these pedestals produce a change in thickness of the resulting resist layer, resulting in the pixels having a different spectral response despite the use of the same color resist. Yet other embodiments relate to image sensor arrangements that enable generation of red, green, blue, and NIR output data using only four conventional (red, green, blue, cyan, magenta, yellow) color resists. Numerous other novel features and arrangements are also detailed.
Owner:TUOSHI OPTICAL CO LTD

Lanthanum calcium sulfide transparent ceramic powder material with wide spectrum transmittance and preparation method of lanthanum calcium sulfide transparent ceramic powder material

The invention is suitable for the technical field of ceramic materials, and relates to lanthanum calcium sulfide transparent ceramic powder with wide spectrum transmittance and a preparation method of the lanthanum calcium sulfide transparent ceramic powder. The preparation method specifically comprises the following steps: weighing nitrate containing La and Ca according to a specific molar ratio, respectively dissolving the nitrate containing La and Ca into deionized water, and fully mixing to obtain a solution A; adding a thiourea solution into the solution A, and stirring to obtain a mixed solution; heating and continuously stirring the mixed solution, and carrying out hydrolysis and polymerization reaction to form white sol; then, the sol is placed in a drying oven to be subjected to dehydration treatment until the sol is converted into dry gel; and heating the dried gel at high temperature to obtain lanthanum calcium sulfide precursor powder. And putting the lanthanum-calcium sulfide precursor powder into an atmosphere furnace, and carrying out vulcanization reaction in a sulfur-containing atmosphere to prepare the lanthanum-calcium sulfide powder. The preparation method has the advantages that the operation process is simple, the prepared powder is uniform in particle size, high in purity and excellent in dispersity, and the optical performance of the transparent ceramic can be improved.
Owner:UNIV OF JINAN

Touch screen light transmission detection device

The invention belongs to the technical field of touch screen testing, and particularly relates to a touch screen light transmission detection device which comprises a detection table, a light transmission detection assembly is installed on the top of the detection table and comprises an LED beam lamp and a spectrum light transmittance instrument, a sliding groove frame is fixedly installed on the top of the detection table, the LED beam lamp is movably installed on the inner side of the sliding groove frame, and the spectrum light transmittance instrument is installed on the sliding groove frame. A moving frame is slidably mounted in the sliding groove frame. The orientation of the LED beam lamp can be adjusted through the angle adjusting assembly by means of the arranged detection adjusting assembly, so that light emitted by the LED beam lamp irradiates and penetrates through the touch screen at the angle of 30 degrees with the normal, and the position of the spectrum light transmittance instrument can be adjusted through a Z-shaped block and a moving block. According to the touch screen light transmittance detection device, light can be irradiated on the surface of the spectrum light transmittance instrument after being refracted by the touch screen, the light transmittance of the touch screen under the irradiation of inclined light can be detected, the accuracy of the light transmittance detection of the touch screen is ensured, and the practicability and reliability of the light transmittance detection of the touch screen are improved.
Owner:ANTOUCH TECHNOLOGY (HUIZHOU) CO LTD

Optical laminate and method for manufacturing same

An optical laminate having an optical functional layer on at least one surface of a substrate, the optical functional layer containing a colorant containing a plurality of pigments and a binder resin, the optical laminate having an average spectral transmittance of 25% or less at a wavelength of 350 nm to 750 nm, an average spectral transmittance of 85% or more at a wavelength of 850 nm to 2500 nm, and an average spectral transmittance of 25% or less at a wavelength of 850 nm to 2500 nm. When the maximum spectral transmittance at a wavelength of 350 nm or more and less than 460 nm is set as T1, the maximum spectral transmittance at a wavelength of 460 nm or more and less than 570 nm is set as T2, and the maximum spectral transmittance at a wavelength of 570 nm or more and 750 nm or less is set as T3, at least one of the following formulae (1A) and (2A) is satisfied, where T1 is the maximum spectral transmittance at a wavelength of 350 nm or more and less than 460 nm, T2 is the maximum spectral transmittance at a wavelength of 460 nm or more and less than 570 nm, and T3 is the maximum spectral transmittance at a wavelength of 570 nm or more and less than 750 nm. 0.1 < = T1 / T2 < = 10 (1A) 1 < = T3 / T2 < = 20 (2A)
Owner:아티엔스가부시키가이샤 +1

Method and apparatus for producing calibrated spectral imaging devices

Calibrating a spectral imaging device includesproviding first calibration light, with first calibration spectrum (IMPBF),coupling the first calibration light to the device,obtaining a first measured profile of the first calibration light by recording first detector pixel signals during scanning a control parameter of a Fabry-Perot interferometer of the device,obtaining a second measured profile of the first calibration light by recording second detector pixel signals during scanning,determining a first simulated profile from the first calibration spectrum using previously measured spectral quantum efficiency of first detector pixels, previously measured spectral transmittance function, and first calibration data,determining a second simulated profile from the first calibration spectrum using previously measured spectral quantum efficiency of second detector pixels, previously measured spectral transmittance function, and the first calibration data, andmodifying first calibration data until simulated profiles match with corresponding measured profiles.
Owner:TEKNOLOGIAN TUTKIMUSKESKUS VTT OY

Optical laminate and polarizing plate, image display panel, and image display device using said optical laminate

Provided is an optical laminate that reduces blue light, has excellent scratch resistance and adhesion, and is capable of suppressing reduction in luminance. The optical laminate includes a primer layer containing a benzotriazole-based compound between a base material and a hard coat layer, and satisfies conditions 1-3. Condition 1: The spectral transmittance at a wavelength of 410 nm is less than 1.0%, the spectral transmittance at a wavelength of 450 nm is 15.0%-85.0%, and the spectral transmittance at a wavelength of 490 nm is 85.0% or more. Condition 2: The average indentation hardness of a cross section of the primer layer at a position 1.0 μm in the thickness direction from the interface between the hard coat layer and the primer layer is 190 MPa or more. Condition 3: When the adhesion of the primer layer and the hard coat layer to the base material is evaluated by the cross-cut method of JIS K5600-5-6: 1999, the classification of the evaluation is 0 or 1.
Owner:DAI NIPPON PRINTING CO LTD

Laminated film, film for protected horticulture, and woven or knitted fabric

A laminated film having a heat-ray reflection layer and a weather-resistant layer on at least one surface of the heat-ray reflection layer, in which the heat-ray reflection layer has a multilayer laminated structure in which 20 or more layers of a first layer mainly composed of a resin and a second layer mainly composed of a resin are alternately laminated, the first layer contains polyethylene naphthalate, a protective layer with a thickness of 10 μm or less and mainly composed of the resin of the first layer is provided on at least one surface of the multilayer laminated structure, the weather-resistant layer with a thickness of 3-15 μm is composed of a resin composition containing 8-45 mass % of an ultraviolet absorber having a triazine skeleton, and a secondary reflection band of the laminated film is 400-700 nm, and a spectral transmittance in the secondary reflection band is 60% or more.
Owner:TOYOBO CO LTD

Optical laminate and image display device comprising same

The present invention relates to an optical laminate and an image display device comprising same, the optical laminate comprising: a thin film glass; a first hard coating layer formed on one surface or both surfaces of the thin film glass; and a second hard coating layer formed on the first hard coating layer, wherein the first hard coating layer includes a thermosetting resin and a UV absorber, and the second hard coating layer includes a light-transmitting resin, and can provide the optical laminate and the image display device comprising same, the first hard coating layer having sufficient impact resistance, including the UV absorber so as to able to block 95% or more of ultraviolet rays with a wavelength of 300-380 nm, having excellent spectral transmittance of 80% or higher in the 440 nm wavelength region, and having excellent hardness, scratch resistance, adhesiveness and flexibility.
Owner:DONGWOO FINE CHEM CO LTD

Method for quickly verifying imaging effect of aperture coding infrared hyperspectral imaging system

This invention proposes a rapid verification method for the imaging performance of an aperture-coded infrared hyperspectral imaging system. This method uses an N×M filter array as the indoor imaging target. This array includes a central infrared window and multiple filters with different center wavelengths surrounding the infrared window, containing rich spectral feature information and geometric and spatial positional information of the filters. Utilizing a large-area blackbody and a collimator with a large focal plane, the system can capture all the necessary information from the filter array. After image reconstruction, using the data from the central window as a reference, the spectral transmittance curves of each filter can be calculated quickly and accurately, thereby verifying the system's ability to acquire spectral information. The system's ability to acquire geometric information can also be verified by observing the geometry and relative positions of the filters in each spectral channel. This invention provides an efficient, reliable, and rapid verification method for aperture-coded infrared hyperspectral imaging systems.
Owner:SHANGHAI INSTITUTE OF TECHNICAL PHYSICS CHINESE ACADEMY OF SCIENCES

Method and system for measuring and calculating signal-to-noise ratio of uncooled infrared detection system

The invention discloses a method and a system for measuring and calculating a signal-to-noise ratio of an uncooled infrared detection system, relates to the technical field of infrared target detection, and solves the problems that parameters of an uncooled detector are lost during research and development of a low-cost infrared system and detection effects of different view field angles of a large-view-field system are different. The radiance at the entrance pupil is calculated through the target radiance and the atmospheric transmittance, the irradiance and the illuminance from the pupil to the center of an image plane are derived based on optical system parameters, the irradiance related to a field angle is obtained according to a geometrical relationship for large-field edge illuminance attenuation, and the irradiance related to the field angle is obtained according to a geometrical relationship for a point target which is not filled with a photosensitive element. Calculating the projection on the photosensitive element and the signal radiation quantity received by the pixel; the noise equivalent temperature difference is tested by adopting a collimation method, and the value is obtained by combining a collimator and the spectral transmittance of an optical system so as to calculate the noise power; and the signal-to-noise ratio is calculated by combining the signal amplitude-flux. The method solves the problem of parameter loss through actually measured noise equivalent temperature difference value estimation, considers view field energy attenuation in the evaluation process, and is suitable for fine evaluation of a large view field system.
Owner:江淮前沿技术协同创新中心

Method and device of processing data used for processing of generating spectral images

To reduce an error accompanying the generation of images of a plurality of wavelength bands.SOLUTION: A method includes: acquiring first information indicating a relative position between an encoding element including a plurality of regions having spectral transmittance different from each other and an image sensor that detects light transmitted through the encoding element; and correcting data including second information about the spatial distribution of the spectral transmittance on the basis of the first information. The data is used for processing of generating four or more spectral images on the basis of an image acquired by causing the image sensor to detect the light transmitted through the encoding element. Each of the four or more spectral images indicates an image corresponding to one wavelength band of the four or more wavelength bands.SELECTED DRAWING: Figure 1A
Owner:PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD

optical filter

The present application relates to an optical filter having a substrate and a dielectric multilayer film laminated on at least one main surface side of the substrate and as an outermost layer, wherein the substrate contains a resin film containing a resin and a pigment (A) which is a near-infrared absorbing pigment, for which, in a spectral transmittance curve of a coating film obtained by dissolving the pigment (A) in the resin and coating on an alkali glass plate, specific spectral properties are satisfied.
Owner:AGC INC

Scratch-resistant and impact-resistant photoelectric glass cover plate as well as preparation method and application thereof

The invention relates to a special glass material, in particular to a scratch-resistant and impact-resistant photoelectric glass cover plate as well as a preparation method and application thereof. The high-temperature-resistant ceramic material is prepared from the following components in parts by weight: 55.0 to 63.0 parts of SiO2, 9.0 to 15.0 parts of Al2O3, 0.1 to 2.0 parts of CaO, 4.0 to 8.0 parts of MgO, 3.0 to 7.0 parts of K2O, 9.0 to 15.0 parts of Na2O, 0.5 to 2.0 parts of Li2O, 0.5 to 3.0 parts of ZrO2, 2.0 to 6.0 parts of B2O3, 30 to 3.0 parts of Bi2O3 and 0.1 to 1.0 part of CeO2. The cover plate glass provided by the invention not only has good performance in the aspects of scratch resistance and impact resistance, but also has excellent spectral transmittance, relatively low haze and good chemical stability, meanwhile, the cover plate glass can be endowed with the performance of eliminating stray light so as to avoid light leakage of a screen, and the processability is good.
Owner:CNBM PHOTONICS TECH CO LTD

Multi-junction solar cell anti-reflection film layer and preparation method thereof

The invention belongs to the technical field of solar cells, and particularly relates to a multi-junction solar cell anti-reflection film layer and a preparation method thereof. The multi-junction solar cell anti-reflection film layer provided by the invention comprises a low-refractive-index amorphous carbon layer, a medium-refractive-index amorphous carbon layer and a high-refractive-index amorphous carbon layer which are stacked in sequence, the refractive index of the low-refractive-index amorphous carbon layer is 1.7-1.9, the optical thickness is 1 / 4 of the wavelength of 500nm, and the layer thickness is 60-80nm; the refractive index of the medium-refractive-index amorphous carbon layer is 2.0-2.2, the optical thickness of the medium-refractive-index amorphous carbon layer is 1 / 4 of the wavelength of 700 nm, and the thickness of the medium-refractive-index amorphous carbon layer is 70-90 nm; the refractive index of the high-refractive-index amorphous carbon layer is 2.3-2.5, the optical thickness of the high-refractive-index amorphous carbon layer is 1 / 4 of the wavelength of 1100 nm, and the layer thickness is 110-120 nm. The anti-reflection film layer provided by the invention has the advantages of wide spectrum, high transmittance, excellent environmental stability and flexible refractive index adjustability.
Owner:WUXI HUAXING OPTOELECTRONICS RES CO LTD +1

Anti-blue light contact lens and preparation method thereof

ActiveCN116715800BImprove solubilityGood light and heat stabilityOptical elementsArylSpectral transmittance
The present invention provides an anti-blue light contact lens and a preparation method thereof. The anti-blue light contact lens of the present invention is formed by thermal polymerization of at least one reactive monomer, a cross-linking agent, an initiator and an anti-blue light agent (tetraaryl metal porphyrin compound containing olefin ester or tetra[4-(substituted acryloyloxy)phenyl]metal porphyrin). The lens has good light and thermal stability, and the light transmittance in the harmful blue light band of 385-445nm can be less than 80%, and the light transmittance in the beneficial blue light band of 446-505nm is higher than 90%; more preferably, the spectral transmittance in the harmful blue light band of 385-445nm can be less than 10%, and the spectral transmittance in the beneficial blue light band of 446-505nm is higher than 70%.
Owner:JIANGSU HORIEN CONTACT LENS +1

Micro-plastic infrared characteristic spectrum extraction and efficient and accurate identification method

The invention belongs to the field of environmental protection and micro-plastic identification, and discloses a micro-plastic infrared characteristic spectrum extraction and efficient and accurate identification method, which comprises the following steps of: 1, acquiring infrared spectrum data of a micro-plastic sample, and constructing a micro-plastic spectrum database; 2, extracting a characteristic spectrum from the infrared spectrum data in the step 1 by adopting a progressive two-step method combining equal-interval sampling and a competitive self-adaptive reweighted sampling algorithm; step 3, performing standard normal transformation on the transmittance of the characteristic spectrum in the step 2; and 4, constructing a feature training set and a feature test set by taking the transmittance of the infrared spectrum transformed in the step 3 as input and the micro-plastic type as output. Training the artificial neural network model by adopting the feature training set, and optimizing hyper-parameters in the model through the feature test set by applying a genetic algorithm to form a final micro-plastic identification artificial neural network model; and step 5, for micro-plastics to be identified, obtaining the characteristic transmittance of the micro-plastics to be identified through the spectral data obtained in the step 1 and the characteristic wave number extracted in the step 2, performing standard normal transformation on the micro-plastics to be identified through the step 3, inputting the transformed infrared spectral transmittance into the micro-plastic identification artificial neural network model, and giving the type of the micro-plastics. And identification of the micro-plastic is realized. According to the method, traversal sampling of the whole spectrum data set is effectively avoided, the extraction efficiency of the characteristic spectrum is improved, hyper-parameter optimization is performed on the artificial neural network model by adopting the genetic algorithm, overfitting of the model is effectively prevented, and the generalization ability of the model is improved.
Owner:XUZHOU UNIV OF TECH

Fishing line

PCT designated stage expiredWO2024252629A1LinesSpectral transmittanceZoology
This fishing line contains a colorant and has a spectral transmittance of 13 to 40% in a wavelength range of 425 to 575 nm. Said fishing line can be expected to yield a favorable catch for various fish species.
Owner:DUEL

Multiple fluorescent dye quantification method and device

Provided are a method and a device for rapidly and stably quantifying the spectral intensity of fluorescent emissions by increasing the number of fluorescent dyes that can be used simultaneously. The device comprises a filter control unit 2, a filter (spectral modulator) 3, a sensor array 4, a storage unit 5, and a regression model 6. The filter control unit 2 controls the spectral modulator 3. The spectral modulator 3 modulates spectral transmittance, and includes a first polarizer 32a, a liquid crystal variable retarder 31, and a second polarizer 32b. The sensor array 4 observes an observed object 8 including a plurality of fluorescent dyes through the spectral modulator 3. The storage unit 5 stores the luminance values of camera pixels captured under N types of modulation, as N-dimensional feature vectors. The regression model 6 is trained using the feature vectors under the modulation of each fluorescent dye, and quantifies the fluorescent dyes to reconstruct the intensity image 9 of each fluorescence.
Owner:NARA INSTITUTE OF SCIENCE AND TECHNOLOGY +1

Filter and method for determining the filter taking into account the spectral transmittance of the ocular medium of the wearer's eye

The present invention relates to a method for determining at least one filter for a visual device intended to be placed in front of a user's eye, the at least one filter being capable of improving the user's visual comfort and / or visual performance, the method comprising the following steps: ‑ determining the spectral transmittance of the ocular medium of at least one eye of the user; and ‑ determining at least one filter based on the determined spectral transmittance of the user's ocular medium, such that the filter has a spectral transmittance distribution comprising: o a first portion having a maximum transmittance value between 380 nm and a predetermined wavelength threshold, o a second portion with decreasing transmittance values ​​between the predetermined wavelength threshold and 670 nm. The present invention also relates to a filter whose spectral transmittance is calculated based on the spectral transmittance of the user's ocular medium. The present invention further relates to a set of filters, wherein each filter in the set has a spectral transmittance based on the spectral transmittance of the ocular medium of users of different ages.
Owner:ESSILOR INTERNATIONAL(COMPAGNIE GENERALE D OPTIQUE)

Corrosion-resistant high-strength cover plate glass as well as preparation method and application thereof in extreme environment

The invention belongs to the technical field of special glass materials, and relates to corrosion-resistant high-strength cover plate glass as well as a preparation method and application thereof in an extreme environment. The corrosion-resistant and high-strength cover plate glass is prepared from SiO2, Al2O3, B2O3, K2O, Na2O, CaO, MgO, CeO2, Bi2O3, 0 to 3.0 parts of Sb2O3, SnO2 and Li2O. The invention further discloses a preparation method of the corrosion-resistant and high-strength cover plate glass. The cover plate glass provided by the invention has excellent performance, has good anti-halation and anti-crosstalk performance after reduction and chemical strengthening in the aspects of spectrum transmittance and chemical stability, has relatively high mechanical strength, impact resistance and falling resistance, has good processability, and is suitable for large-scale production. The cover plate glass can be applied to various extreme environments.
Owner:CNBM PHOTONICS TECH CO LTD