258 results about "Optical density" patented technology

The invention discloses an edge spraying compensation control method based on intelligent visual feedback. The method comprises the following steps: performing space scanning on a to-be-sprayed workpiece to obtain spraying image data, and establishing a space corresponding relation between a spray gun motion coordinate and a workpiece surface coordinate; registering the real-time spraying image by using the corresponding relation, identifying a geometric boundary line, brightness gradient change and a coating adhesion area of the edge of the workpiece, and generating edge feature data; according to the difference between the edge feature data and the target spraying image, the spraying coverage deviation and the boundary overlapping error are calculated, the coating thickness change trend, the optical density change rate and the boundary direction offset are extracted, and the spraying gun posture adjustment amount, the spraying distance correction amount, the spraying pressure correction amount and the path speed correction amount are generated; the angle, the spraying distance, the pressure and the movement speed of the spray gun are dynamically adjusted according to the parameters; according to the method, real-time visual feedback and self-adaptive compensation control in the spraying process are achieved, and the uniformity and consistency of the coating on the edge of the workpiece are effectively improved.

The main object of the present invention is to provide an organic EL display that has excellent light emission characteristics to enable low voltage driving and has light emitting elements with high reliability, thereby serving to realize a desired current density. Provided is a display device including a substrate, a first electrode, a second electrode, a pixel separation layer, and an organic layer containing a light emitting layer, wherein the pixel separation layer contains a colorant (D-DL), has an optical density of 0.5 to 3.0 in the visible light wavelength range per μm of the thickness of the pixel separation layer, and has a plurality of pixel parts in a plan view. The detection intensity of the sulfur ion (S−), the detection intensity of the chlorine ion (Cl−), the detection intensity of the bromine ion (Br−), and the sum of the detection intensity of the chlorine ion (Cl−) and the detection intensity of the bromine ion (Br−), all measured by time-of-flight secondary ion mass spectrometry at a position 3 nm deep in each pixel part from the surface of the first electrode, the surface being in contact with the organic layer containing a light emitting layer, satisfy relationships represented by specific general formulas.

The invention discloses a simple test method for saturated light-emitting light density of low-basis-weight thermo-sensitive paper, and relates to the technical field of thermo-sensitive material detection.The simple test method comprises the steps that an undeveloped surface image of to-be-tested low-basis-weight thermo-sensitive paper is obtained, and the undeveloped surface image and initial heating parameters are input into a pre-trained generative adversarial network model; generating a predicted color developing light density distribution image corresponding to the saturated color developing state and associated initial heating parameters; and carrying out weighted normalization processing on the optical density distribution data based on thin-layer structure characteristics, and outputting a global saturated optical density value and a color rendering uniformity evaluation result. According to the method, the generative adversarial network and the multispectral imaging technology are combined, so that the optical density distribution in the saturated color development state is directly predicted from the undeveloped surface image, and the test efficiency and the measurement precision are remarkably improved.

A method and instrument for determining optical density of a solution is disclosed. A flow cell 1 having at least three light paths (4a, 4b, 4c) is provided (100), wherein each light path has a respective predetermined path length, l. Absorbance readings are taken (400), A, of the solution at the at least three light paths (4a, 4b, 4c). For each pair of light paths, a slope, αc, is calculated (500) by dividing a difference in absorbance reading, ΔA, with a difference in path length, Δl. The calculated slopes, αc, are compared (600), and a) if the calculated slopes, αc, are the same, the slope is used for determining (700) optical density of the solution, or b) if the calculated slopes, αc, are not the same, the steepest slope of the calculated slopes is used for determining (701a) optical density of the solution, or the slope of the calculated slopes being in the range of an absorbance reading of 0.01 to 2 is used for determining (701b) optical density of the solution.

The invention discloses a dual digital nucleic acid detection method based on non-uniform liquid drops, which comprises the following steps: adding a nucleic acid sample containing at least two target nucleic acids and a primer sample containing at least two corresponding specific primers into an amplification reaction system to obtain an amplification reagent; generating a non-uniform liquid drop for the amplification reagent; carrying out amplification on the liquid drops; injecting the amplified liquid drops into a micro-channel, and imaging the liquid drops in the micro-channel by using imaging equipment to obtain a liquid drop image; extracting the size of the liquid drop and the optical density value of the precipitate in the liquid drop image through an image analysis algorithm, and determining the type of the liquid drop in combination with the liquid drop characteristic curve of each type of liquid drop, the size of the liquid drop and the optical density value of the precipitate; and counting the proportion of each type of liquid drops in the total number of liquid drops, and calculating the concentrations of at least two target nucleic acids in all liquid drops according to the proportion of each type of liquid drops in the total number of liquid drops. According to the invention, label-free and multi-target digital nucleic acid detection can be realized.

An example apparatus disclosed herein queries a neural network for optical densities at sample points along training rays associated with training the neural network to provide a neural representation of the video frame. The disclosed example apparatus also generates the occupancy grid for the video frame based on the optical density at sample points along the training ray, the occupancy grid including voxels for indicating whether a respective portion of a three-dimensional (3D) volume associated with the neural representation is occupied by a geometry.

An object of the present disclosure is to implement a coloring pattern with a high optical density on an electrode substrate to improve display reliability and lifetime of a display as well as vivid colors. That is, the present disclosure relates to a composition and a method that can form the pattern of a pixel defining layer that can improve visibility and contrast by satisfying the optical density of 0.80 / μm to 1.5 / μm in the panel after post-baking treatment.

The invention relates to the technical field of workpiece alignment, in particular to a machined workpiece automatic alignment method and system based on image measurement, and the method comprises the following steps: collecting a workpiece image, analyzing a local curvature change rate, adjusting sampling density, reconstructing surface features, generating micro-topography data, calculating a stability score, and outputting an attitude correction parameter. And tracking a time sequence deviation derivation instruction response deviation track, fitting a deviation curve to invert delay mapping to generate an error correction table, and mapping a control signal to adjust a step length to generate an adaptive driving instruction. According to the method, the morphological stability score is calculated through the ratio of the boundary curvature continuity to the area compactness of the equal-optical-density region, accurate judgment on the boundary contour under different image conditions is achieved, the response offset function is constructed with the help of the least square method, the execution error correction table is mapped, the response precision and execution consistency of the alignment instruction are improved, and the accuracy of the alignment instruction is improved. And the alignment efficiency and the posture stability of the workpiece under the complex morphology condition are improved.

A panel for a display device, a display system for a vehicle, and a manufacturing method are disclosed. The panel comprises a decorative layer with a color and luminance pattern, the decorative layer having a first and a second surface; and on the side of the second surface, means for displaying a pattern that is essentially the inverse pattern of the color and luminance pattern of the decorative layer. The inverse pattern is essentially ineffective against the color and luminance pattern of the decorative layer when the first surface is viewed in reflected light. In transmitted light, the inverse pattern effectively cancels out the color and luminance pattern of the decorative layer, resulting in a panel with homogeneous color and luminance balance.

The invention discloses a hand motion FNIRS signal classification method based on t distribution optimization feature extraction, and the method specifically comprises the steps: employing a portable functional near-infrared collection device to collect an optical density signal of a forehead cortex brain region during the motion execution period during the operation of the device; after pretreatment, the concentration of oxyhemoglobin HBO and the concentration of deoxidized hemoglobin HBR are calculated according to the corrected Beer-Lambert law; according to motion execution and resting state segmentation data, time domain features and time-frequency domain features of oxyhemoglobin concentration data signals of each channel of each experiment test are extracted, and a first feature matrix is formed; performing kernel density estimation and kurtosis and skewness test on the first feature matrix to obtain a second feature matrix, performing t distribution on each corresponding feature satisfying normal distribution in the second feature matrix of the motion execution and resting states, and optimizing feature selection on the basis to obtain an optimized third feature matrix; the optimized third feature matrix is used as classifier input, a brain-computer interface system model training result is obtained, and effective feature selection and extraction are achieved; according to the method, the brain-computer interface system feature extraction of the hand motion FNIRS signals can be optimized, so that the classification performance is improved.

To prepare a pixel define layer capable of improving the hue, impact resistance, reliability, and lifespan of an organic light-emitting display device.SOLUTION: A method for preparing a pixel defining layer comprises the steps for application and coating of a photosensitive composition, which is then subjected to pre-baking, light exposure, development, and post-baking. After the post-baking, the coating film has an optical density of 0.80 to 1.5 / μm, a plastic hardness of 350 to 470 N / mm2, and a modulus of 5,200 to 6,800 Mpa.SELECTED DRAWING: Figure 1

The invention relates to a microalgae biomass optical density detection method which comprises the following steps: taking a certain volume of algae liquid obtained under different batches or different culture conditions, repeatedly filtering the algae liquid by using a filter screen dried to constant weight, drying the algae body and the filter screen to constant weight, representing the dry weight of microalgae biomass by using a difference value before and after drying, and calculating the optical density of the microalgae biomass according to a calculation result. Taking a certain volume of algae solutions obtained in different batches or under different culture conditions, and fixing the volume to the same dry weight to obtain an algae solution to be detected; carrying out full-wavelength scanning on the algae liquid to be detected to obtain full-spectrum characteristics; performing variable coefficient analysis on the full-spectrum characteristics to obtain a screening scanning wave band; and selecting the wavelength corresponding to the minimum variable coefficient from the screening scanning wavebands as the final detection wavelength. By performing variable coefficient analysis on the absorption spectrum of the microalgae liquid, an optimal wavelength interval for detecting the optical density of the biomass can be selected, the influence of photosynthetic pigment composition of the microalgae on the optical density value is avoided to a great extent, and the real biomass condition is better reflected.

Described is an ophthalmic device that contains visible light filters. The ophthalmic device is a free radical reaction product of a reactive mixture comprising: one or more monomers suitable for making the ophthalmic device; a first visible light filtering compound, the first visible light filtering compound having a visible light absorption maximum between 430 and 480 nm and a full width half maximum (FWHM) at the visible light absorption maximum of at least 35 nm and up to 150 nanometers, wherein the compound is photostable, and wherein the compound has a molar extinction coefficient of at least 7740 L·mol−1·cm−1; and a second visible light filtering compound. The devices may provide one or more benefits to wearers, including enhanced macular pigment optical density (MPOD), as well as improved color perception and color enhancement.

Disclosed techniques evaluate the visual field of a patient's eye using deep learning techniques. A computer system obtains a plurality of cross-sectional scan images of a retina captured by an optical coherence tomography (OCT) device. The retina has an inner retinal layer. A retinal optical texture analysis (ROTA) map of the inner retinal layer is generated from the plurality of cross-sectional scan images. The ROTA map includes a plurality of pixels, and each pixel of the ROTA map corresponds to a respective optical texture signature value S providing information about tissue composition and optical density of the inner retinal layer at a respective retinal location. The computer system applies a machine learning model to process the ROTA map of the inner retinal layer to determine visual field sensitivity of the retina.

Described is an ophthalmic device that contains visible light filters. The invention provides an ophthalmic device that is a free radical reaction product of a reactive mixture comprising: one or more monomers suitable for making the ophthalmic device; a first visible light filtering compound, the first visible light filtering compound having a visible light absorption maximum between 430 and 480 nm and a full width half maximum at the visible light absorption maximum of at least 35 nm and up to 150 nanometers, wherein the first visible light filtering compound is photostable, and wherein the first visible light filtering compound has a molar extinction coefficient of at least 7740 L·mol−1·cm−1; and a second visible light filtering compound having a visible light absorption maximum between 480 and 530 nm and a full width half maximum of at least 50 nanometers and up to 150 nanometers. The reactive monomer mixture may also contain a third visible light filtering compound. The devices may provide one or more vision benefits, including enhanced macular pigment optical density as well as improved color perception and color enhancement and diminished visual artifacts.

An AI image processing system is provided. The system is configured to receive latent parameters defining representations of attributes of an object in an image. The latent parameters include subsets of latent parameters, and each latent parameter subset corresponds to one attribute. The system is configured to produce a joint encoding of the latent parameters and produce an implicit 3D model of the object based on the joint encoding. The implicit 3D model defines a volumetric representation for each 3D location in the scene with respect to an input viewing direction. The volumetric representation defines a signed distance value and / or an optical density, and a color and / or a feature vector. The system is configured to render a 2D image of the scene including the object viewed from the input viewing direction based on the produced volumetric representations for different 3D locations in the scene.

The invention relates to the technical field of microorganism co-culture fermentation, and discloses a method for producing L-carnitine soybean meal by applying a neural network to optimize fermentation conditions, and the method comprises the following steps: establishing a double-bacterium single-culture control group, collecting a double-bacterium dual-wavelength response data set, and constructing a two-dimensional geometric feature space to obtain a strain feature fingerprint slope; establishing a double-bacterium co-culture fermentation group, decomposing the real-time mixed optical density value to obtain double-bacterium estimated concentration, and constructing an enhanced input data set; then building a bimodal prediction model to output a predicted value of the L-carnitine content; and finally, setting an optimization objective function containing a yield deviation item, a phase regression item and a control smoothing item, and solving to obtain an optimal control input sequence. According to the invention, precise decoupling of the growth state of double bacteria and metabolic phase cooperative regulation and control are realized, information dimension limitation of traditional mixed optical density signals is broken through, and time sequence matching and yield stability of L-carnitine synthesis are guaranteed.

The invention relates to an ultra-low concentration NO detection method based on an ultraviolet differential optical absorption spectrum technology, and belongs to the field of gas detection. According to the method, on the basis of the classic DOAS technology, the process of calculating the differential absorption cross section of the detected gas is omitted, and a mathematical model of the differential optical density and concentration of the detected gas is constructed; when the gas is measured, the difference optical density of the gas to be measured only needs to be calculated and is substituted into the mathematical model, and the concentration value of the gas to be measured is calculated; and correcting the calculated gas concentration by using a temperature compensation method so as to obtain the accurate concentration of the gas to be detected. According to the invention, the detection of pollution gas in ultra-low emission flue gas is realized, and the requirements of new ultra-low emission on a monitoring system are met.

This invention discloses an infrared narrow-band passband and wide-cutoff-band high-optical-density filter based on a CaF2 substrate. It comprises a front film system and a back film system designed on both sides of the CaF2 substrate, with each film system consisting of alternating deposits of Ge and ZnS. The front film system is: 0.762(0.5HL0.5H)^M1 + 1.246(0.5LH.5L)^M2; the back film system is: 0.56(0.5HL0.5H)^M3 + 0.39(0.5HL0.5H)^M4 + 0.28(0.5HL0.5H)^M5 + 0.2(0.5HL0.5H)^M6L. The resulting filter, when tested with a spectrometer, achieves a cutoff bandwidth of 1000nm-7100nm and 8500nm-20000nm, with an average cutoff optical density reaching OD4; the transmission band of 7669±120nm has an average transmittance of 98.85%, and a half-wavelength of 470nm±30nm.

Embodiments of a deadfront article are provided. The deadfront article includes a substrate having a first surface and a second surface. The deadfront article also includes a semi-transparent layer disposed onto the second surface of the substrate. The semi-transparent layer has a region of a solid color or of a design of two or more colors, and the semi-transparent layer has a first optical density. Further, the deadfront article includes a contrast layer disposed onto the region. The contrast layer is configured to enhance visibility of the color(s) of the semi-transparent layer.

Provided is a method to prevent interference between electrodes that causes pixel defects in a pixel defining layer, thereby lowering the touch defect rate of the panel, and implementing a coloring pattern with high optical density on the electrode substrate to not only make the colors vivid but also increase the reliability and lifespan of the display, particularly a composition and a method for forming a pixel defining layer pattern, which comprises a colorant, and the coating film formed by treating at high temperature during post-baking treatment has a high optical density (OD) per thickness, has a low permittivity of 5.0 or less even with changes in measured Hz, and can improve visibility and contrast.

Provided is a light-shielding film for obtaining a light-shielding member capable of visually distinguishing the front and back surfaces while suppressing the occurrence of glare and ghosting. (A) is the glossiness with respect to light at an incidence angle of 60 degrees, (B) is the reflectance with respect to light at a wavelength of 550 nm, (C) is the L value in a CIELAB color system based on the SCE method, and (D) is the optical density (OD). In this case, the light-shielding film (100) is a light-shielding film for obtaining a light-shielding member for an optical device, and has at least a first light-shielding layer (21) and a second light-shielding layer (31). The outermost surfaces (A), (B), (C), and (D) of the surfaces on which the first light-shielding layer (21) and the second light-shielding layer (31) are formed are 2% or less, 4.5% or less, 26 or less, and 1.0 or more, respectively. The difference (B) and the difference (C) between the outermost surface of the surface on which the first light-shielding layer (21) is formed and the outermost surface of the surface on which the second light-shielding layer (31) is formed are 2% or less and 4 or more, respectively.

The present disclosure related to a multilayer protective film that may include a structural PET layer, a first removable adhesive layer underlying the structural PET layer, a first peelable adhesive layer overlying the structural PET layer, a first flame retardant PET layer overlying the first peelable adhesive layer, a second peelable adhesive layer overlying the first flame retardant PET layer, and a second flame retardant PET layer overlying the second peelable adhesive layer. The multilayer protective film may have a lateral flame spread of at least about 20 KW / m2, a specific optical density (Ds) of not greater than about 300, and a cumulative specific optical density (VOF4) of not greater than about 600.

The invention provides a light source device and a projector, which have a rectangle extending in one direction and generate illumination light with suppressed optical density. This light source device is provided with: a light source unit that emits light including a first light beam; a light amplification optical system that generates amplified light obtained by amplifying light along a first axis; an overlapping optical system that overlaps the amplified light emitted from the light amplifying optical system with a region to be illuminated; and a light scanning unit that scans the amplified light incident from the light amplification optical system in a direction along a second axis orthogonal to the first axis in the region to be illuminated, a cross-section of the first light beam based on a surface orthogonal to the optical axis of the light amplification optical system having a shape having a long side and a short side, the short side of the first light beam being along the first axis.

The present invention provides a pressure measurement sheet set capable of measuring pressure distribution even when used in high-temperature environments. The pressure measurement sheet set comprises: a first sheet having a first layer containing microcapsules containing a coloring agent and a matrix component; and a second sheet having a second layer containing a coloring agent. The pressure measurement sheet set has a color density of 0.30 or less as determined by the following color density measurement 1. Color density measurement 1 involves laminating the first and second sheets so that the first layer of the first sheet and the second layer of the second sheet face each other to obtain a laminate. After pressurizing the laminate at 220°C and 4.5 MPa for 2 minutes, the optical density of the first sheet is measured as the color density.

The invention relates to the technical field of optical density testing of cable combustion, in particular to electric wire and cable vertical combustion test equipment which comprises a shading test box, a sample holder arranged in the shading test box and an igniter arranged on one side of the sample holder. The reflecting mirror is arranged in the light-shielding test box in a limited space, multiple times of reflection are performed in smoke in the light-shielding test box in the limited space to form an extended light-transmitting light path, the driving part drives the uppermost reflecting mirror to turn over and rotate at a fixed angle to form an alternately-changed light-transmitting light path, and the scraping plate can be driven to timely clean the surface of each reflecting mirror. Under the cooperation of the driving part and the transmission part, a negative pressure environment is formed in the upper area of the inner cavity of the shading test box to simulate the combustion condition of the wire cable under the actual installation condition, and the upward suction effect similar to a chimney is formed on smoke in the shading test box under the negative pressure environment; and the authenticity of the tested test data is ensured.

An optical filter has an average optical transmission of greater than about 50% in a visible wavelength range (e.g., wavelengths from about 420 nm to about 550 nm) and an optical density greater than about 1.5 in an infrared wavelength range (e.g., wavelengths from about 650 nm to about 800 nm). The optical filter can have a sharp band edge between the visible and infrared ranges. For example, a change in percent transmission of at least about 30% can occur over a wavelength range not greater than about 10 nm wide and / or the slope of the band edge can be greater than about 5% / nm. An optical system includes the optical filter disposed between an emissive display and an optical sensor.

The utility model relates to the technical field of linear laser generating devices, in particular to a U-shaped homogenizing generating device for linear laser energy. Comprising a laser diode, a focus lens, a Powell prism and a plano-convex cylindrical lens, wherein the focus lens, the Powell prism and the plano-convex cylindrical lens are all arranged on an emergent light path of the laser diode; one end, far away from the laser diode, of the focusing lens is an aspheric surface, the focusing lens is used for focusing light beams emitted by the laser diode, and the Powell prism and the plano-convex cylindrical lens are used for dispersing the focused light beams into uniform U-shaped homogenized line laser. Through the arrangement, the Powell prism and the plano-convex cylindrical lens in the embodiment can generate U-shaped homogenized line laser with uniform optical density, good stability and good linearity, the structure is simple, and industrial mass production can be realized.

According to the blood vessel blood oxygen saturation degree calculation method based on the multispectral eye fundus image, blood vessel skeleton extraction and blood vessel topological graph construction are introduced in the method, and refined description of a blood vessel structure is achieved. The blood vessel radius self-adaptive calculation is carried out based on the blood vessel topological graph, the blood vessel positioning precision is improved, and a more accurate pixel value basis is provided for subsequent blood vessel internal and external pixel value calculation. According to the method, a light intensity ratio compensation mechanism is introduced, in 548nm light density calculation, a 605nm extravascular pixel value is converted into equivalent 548nm incident light intensity through a pre-calibrated light intensity ratio, the difference of reflection characteristics of tissues to different wavelengths is eliminated, the accuracy of a light density calculation result is improved, and then the accuracy of a blood oxygen saturation degree calculation result is improved.

This document describes systems and techniques designed to compensate for uneven luminance in curved-edge OLED displays. In this document, a computing device is configured with a curved-edge display (222) and a luminance manager (106) to receive a luminance input that is displayed, or intended to be displayed, by pixels of the curved-edge display. Based on the received luminance input, the luminance manager (106) determines a luminance change for the pixels of the curved-edge display (222). Based on this determined luminance change, the luminance manager (106) modifies the displayed luminance, or the intended luminance to be displayed by the curved-edge display (222), to effectively compensate for the uneven luminance.