201 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.

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.

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

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.

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.

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.

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.

Imaging devices, imaging apparatus, and methods are provided to improve the development of image recording media. The imaging devices comprise at least a pressing member and at least a first deformable pressure-receiving member. The pressing member is provided with a step feature which is pressed against the first deformable pressure-receiving member. As an image recording medium moves through between the pressing member with the step feature and the deformable pressure- receiving member, a corresponding step difference is formed on the medium where a distinct shear mechanism was experienced. The efficiency of image development is significantly improved as evident by the significant increase in the fresh optical density observed immediately after development even with a reduced applied force.

The invention provides a method for testing the optical density of an absorption type laser goggles, and relates to the technical field of laser detection. The method for testing the optical density of the absorption type laser protective goggles comprises the following specific steps: S1, placing equipment: sequentially placing a laser light source, an attenuator, a polarization beam splitter prism, an aperture diaphragm I, a semi-transparent and semi-reflective prism, a photoelectric detector I, an aperture diaphragm II and a photoelectric detector II, other parts are arranged on the same straight line; s2, setting a light source: turning on a laser light source and preheating; and S3, releasing the light source: opening the aperture diaphragm I, and enabling the emergent light beam of the laser light source to enter the polarization beam splitter prism through the attenuator. A device for generating linear polarized light and monitoring the polarization state of a light beam entering the surface of the protective glass is introduced into a test light path, so that laser energy before and after a to-be-detected product is added does not generate large fluctuation, and the accuracy of an optical density detection result is further improved.

The present application provides a transcatheter repair system. The transcatheter repair system includes a sheath and an implant. The implant includes a flexible, slender member. The sheath includes a proximal portion and a distal portion. The flexible, slender member is movably mounted within the sheath. At least the developing intensity of the distal portion of the sheath is less than the developing intensity of the flexible, slender member. The optical density of the developing image of the distal portion of the sheath is configured to be 0.5-1.2. The optical density of the developing image of the flexible, slender member is configured to be 1.5-2.5. By simultaneously adjusting the optical density of the developing images of the sheath and the flexible, slender member, it is ensured that the flexible, slender member has the desired developing effect in the entire system.

A display panel and a manufacturing method thereof are provided. The display panel includes an upper display substrate and a lower display substrate. The upper display substrate includes: a base substrate; a light shielding pattern including an opening portion corresponding to a pixel area defined in the light shielding pattern; a color filter overlapping the pixel area; an encapsulation layer disposed on the lower side of the light shielding pattern and the lower side of the color filter; a partition wall disposed on the lower side of the encapsulation layer, overlapping the light shielding area, and including a partition wall opening portion corresponding to the pixel area defined in the partition wall; and a quantum dot layer disposed inside the partition wall opening portion. The partition wall includes a first layer and a second layer, the first layer being directly disposed on the bottom surface of the encapsulation layer, and the second layer being directly disposed on the lower side of the first layer and having a greater optical density than the first layer.

The application provides a display panel and a manufacturing method thereof. The display panel comprises a functional additional area, an array substrate, a light-emitting functional layer, a thin film packaging layer and a color film layer are arranged in the functional additional area in a stacked manner, the color film layer comprises a first black matrix and color resistance units between the first black matrix; wherein the first black matrix comprises a first main body part and first lap parts on both sides of the first main body part, the first lap parts and the color resistance units have overlapping parts, by making the thickness of the first main body part less than the thickness of the first lap parts, the optical density of the first black matrix in the fingerprint identification optical path is reduced, thereby increasing the optical transmittance of the functional additional area, and meanwhile, the first black matrix can also consider the screen color of the display panel.

An image is rendered based a neural radiance field (NeRF) volumetric representation of a scene, where the NeRF representation is based on captured frames of video data, each frame including a color image, a widefield IR image, and a plurality of depth IR images of the scene. Each depth IR image is captured when the scene is illuminated by a different pattern of points of IR light, and the illumination by the patterns occurs at different times. The NeRF representation provides a mapping between positions and viewing directions to a color and optical density at each position in the scene, where the color and optical density at each position enables a viewing of the scene from a new perspective, and the NeRF representation provides a mapping between positions and viewing directions to IR values for each of the different patterns of points of IR light from the new perspective.

The utility model discloses a kind of fluorescent electronic quality control card and quality control card system, fluorescent electronic quality control card includes attenuating sheet and light source, the light source is arranged towards the attenuating sheet, the attenuating sheet can make the light intensity of light passing through the attenuating sheet fixed proportion attenuation.Quality control card system includes multiple fluorescent electronic quality control cards, the light source of each fluorescent electronic quality control card is same, the optical density of the attenuating sheet of each fluorescent electronic quality control card is different from each other.Compared with prior art, quality control card system provided by the utility model emits same light by same light source, after attenuation by different attenuating sheets, different fixed light intensity signals are formed respectively, cover the detection range of dry immunization analyzer, can be used for the accurate calibration of equipment, reduce the measurement error between different equipment, improve the stability and reliability of detection result.

The utility model discloses a tester capable of automatically adjusting optical density and concentration, the overall appearance of the tester is in an elliptic cylinder shape, the tester is provided with a main body shell and an inner wall, the main body shell, an internal first-layer space and an internal second-layer space are sequentially arranged at the upper part from outside to inside, the internal first-layer space is arranged between the main body shell and the inner wall, and the internal second-layer space is arranged between the main body shell and the inner wall. The interior of the inner wall is an internal second-layer space; a central control panel is mounted on the main body shell, an external light source and a monochromator are arranged in a first layer space inside the main body shell, a second layer space inside the main body shell consists of four cuvettes and a liquid pool positioned in the center, and a vortex oscillator and an ultrasonic dispersion system are arranged at the lower part of the inner wall of the main body shell.

The present invention relates to a glass-ceramic material for coating a glass or glass-ceramic pane and to the pane coated with the material. The pane has high optical density, a high breaking strength and a high bending strength.