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153 results about "Opacity" patented technology

Opacity is the measure of impenetrability to electromagnetic or other kinds of radiation, especially visible light. In radiative transfer, it describes the absorption and scattering of radiation in a medium, such as a plasma, dielectric, shielding material, glass, etc. An opaque object is neither transparent (allowing all light to pass through) nor translucent (allowing some light to pass through). When light strikes an interface between two substances, in general some may be reflected, some absorbed, some scattered, and the rest transmitted (also see refraction). Reflection can be diffuse, for example light reflecting off a white wall, or specular, for example light reflecting off a mirror. An opaque substance transmits no light, and therefore reflects, scatters, or absorbs all of it. Both mirrors and carbon black are opaque. Opacity depends on the frequency of the light being considered. For instance, some kinds of glass, while transparent in the visual range, are largely opaque to ultraviolet light. More extreme frequency-dependence is visible in the absorption lines of cold gases. Opacity can be quantified in many ways; for example, see the article mathematical descriptions of opacity.

River water quality monitoring method based on multi-source remote sensing data

The invention provides a river water quality monitoring method based on multi-source remote sensing data, and belongs to the technical field of river water quality monitoring. The method comprises the following steps: establishing an inherent optical characteristic model of a river water body based on a Hybrid water body radiation transmission model, optimizing a calculation path by adopting a shortest path algorithm, and carrying out water body optical component inversion by adopting a quasi-analysis algorithm and a generalized inherent optical characteristic algorithm in combination with a multispectral characteristic enhancement model to obtain absorption coefficients of all components; and constructing a multi-band combination index to realize optical coupling effect decoupling, and applying the fine-tuned water quality parameter inversion basic model to a target river area to output a suspended matter concentration distribution diagram, a chlorophyll concentration distribution diagram and a transparency distribution diagram. The technical problem of low precision of remote sensing inversion of water quality parameters caused by mutual coupling of multiple optical active components in a river water body is solved.
Owner:SHANDONG MEASUREMENT SCI RES INST

Liquid medicine foreign matter detection method and system based on machine vision

The invention discloses a liquid medicine foreign matter detection method and system based on machine vision, and the method comprises the steps: obtaining multiband spectral data of a liquid medicine sample, and carrying out the normalization processing to generate a liquid medicine background standard spectral feature template; comparing the refractive index spectral characteristics of the template and the foreign matter-containing liquid medicine, and recording the surface roughness scattering mode and polarized light reflection angle change data of a foreign matter area; calculating a spectrum peak displacement quantized value according to the polarized light data, and extracting foreign matter edge spectrum gradient information in combination with a threshold value; calculating a transparency spectral attenuation coefficient based on the edge gradient information, and obtaining spectral contrast enhancement factors of different foreign matters in combination with the spectral response characteristic data; and if the enhancement factor does not reach the standard, adjusting the spectrum correction parameter and recalculating, fusing the scattering mode and the multi-angle incident spectrum response result to carry out consistency verification, and obtaining a final identification result containing the foreign matter material type and the danger level. The method can improve the drug detection accuracy and guarantee the drug quality safety.
Owner:WUXI TUCHUANG INTELLIGENT TECH CO LTD

Near-infrared assisted low-light scene three-dimensional reconstruction method based on 3D Gaussian splashing

The invention relates to the technical field of three-dimensional reconstruction, in particular to a near-infrared assisted low-light scene three-dimensional reconstruction method based on 3D Gaussian splashing, which is characterized in that generation of a Gaussian ellipsoid is dominated by a near-infrared image with a high signal-to-noise ratio, and a stable geometric basis is provided for a visible light information missing area; in the rendering stage, a near-infrared rendering image and a normal visible light rendering image are respectively generated through Gaussian ellipsoid shared geometric parameters and respective opacity and color attributes of two modes; through cross-modal structure similarity loss, a normal visible light image which is forcibly rendered is aligned with a near-infrared light image in structure, and clear near-infrared structure information is used to strictly constrain the recovery process of the color of the visible light image, so that the accuracy and authenticity of a recovery result are ensured.
Owner:ZHEJIANG UNIV

Transparent antenna for microwave energy transmission and preparation method and application thereof

The invention discloses a transparent antenna for microwave energy transmission and a preparation method and application thereof, and belongs to the technical field of antennas. The transparent antenna comprises a radiation patch, a radiation patch substrate, a dielectric substrate, a reflection backboard substrate and a reflection backboard which are arranged in sequence. Wherein the radiation patch and the reflection backboard are copper nets; the dielectric substrate is of a hollow frame-shaped structure. The preparation method is simple, the adopted materials and the preparation process are both existing mature technologies, large-scale industrial production is easy to achieve, metal copper is adopted to replace traditional transparent metal (ITO), the cost of raw materials is reduced, high-transparency PET and PDMS are adopted as the preparation materials, it is guaranteed that the antenna has high transmittance in the visible light wave band, and the antenna is suitable for large-scale industrial production. Through the combination of the optimized pattern design of the antenna radiation layer and the dielectric substrate with the frame-shaped structure, the energy transmission efficiency and radiation performance of the antenna are remarkably improved, and the dielectric loss of the antenna is reduced.
Owner:CHONGQING UNIV

Illumination variation-oriented asteroid global terrain three-dimensional reconstruction method

The invention relates to an asteroid global terrain three-dimensional reconstruction method for illumination variation, and the method comprises the following steps: inputting an asteroid optical image, estimating the pose of a camera, generating a sparse point cloud, and initializing a Gaussian radiation field; using the image segmentation large model to output a segmentation mask of the asteroid optical image, and pruning the Gaussian radiation field; identifying a shadow region on the surface of the asteroid by combining a # imgabs0 # mixed mask output by a Gaussian radiation field; the camera position, the spherical harmonic coefficient and the Hash code are combined with the angle of the incident light to be input into a neural network, and color values of Gaussian primitives of illumination and shadow areas are regressed; depth normal consistency loss and rotation variance and scale constraint loss are added, optimization of a Gaussian radiation field is jointly supervised in combination with luminosity loss, a Gaussian opacity field is calculated, and a three-dimensional model of the asteroid global terrain is extracted. According to the method, the shadow region on the asteroid can be identified, and the three-dimensional reconstruction precision of the asteroid with surface illumination variation is improved.
Owner:BEIHANG UNIV

Volume cloud rendering method and system based on three-dimensional Gaussian splashing

The invention discloses a volume cloud rendering method and system based on three-dimensional Gaussian splash, and the method comprises the steps: carrying out the feature matching and structure reconstruction of a volume cloud image through an SfM algorithm, obtaining a sparse point cloud in a scene, and representing the sparse point cloud as an anisotropic Gaussian ellipsoid; decomposing the illumination transmission process of the volume cloud into two parts of forward single scattering and internal multiple scattering based on a radiation transmission equation to obtain an illumination modeling formula embedded volume cloud rendering process; determining the contribution of each three-dimensional Gaussian ellipsoid to a rendering result according to the opacity index of the three-dimensional Gaussian ellipsoid, and dynamically cutting the low-contribution three-dimensional Gaussian ellipsoid by adopting a delay deletion strategy to reduce redundancy; a comprehensive loss function is constructed, so that the three-dimensional Gaussian model is focused on the volume cloud region and the structure detail reduction capability is enhanced; and outputting the optimized volume cloud rendering result and the three-dimensional Gaussian model. According to the method, the volume cloud rendering efficiency and quality are effectively improved on the premise of ensuring real-time rendering.
Owner:NANJING UNIV OF INFORMATION SCI & TECH

Layered densification Gaussian sputtering method based on visibility

The invention discloses a layered densification Gaussian sputtering method based on visibility, and relates to the technical field of artificial intelligence and computer vision. According to the scheme, an initial three-dimensional Gaussian primitive set is generated based on sparse multi-view observation data, and initial scene representation is established by extracting spatial distribution parameters, morphological parameters and radiation parameters; performing fusion analysis on the Gaussian primitives based on the multi-dimensional observability parameter set to obtain comprehensive observability index data; executing hierarchical clustering according to the index data, and constructing a multi-layer Gaussian structure of a significant layer, a transition layer and a background layer; performing density enhancement, geometric continuity constraint and parameter update processing on different levels of Gaussian structures, and generating a rendered image of a target view angle under a volume light traveling and transparency hybrid mechanism; according to the method, continuous reconstruction of a scene structure and accurate expression of radiation characteristics can be realized under the sparse view condition, and the geometric fidelity and rendering consistency of new view angle synthesis are improved.
Owner:HENAN JINSHU INTELLIGENT TECH CO LTD

Glass ceramic devices and methods with tunable infrared transmittance

Devices, apparatuses, and methods are disclosed that include a glass or glass ceramic substrate with a bleached region and an unbleached region. Examples include a substrate with a region that transmits IR wavelength light, and a region that is substantially opaque to IR light. Examples include additional opacity in some or all regions to visible wavelength light and / or UV wavelength light.
Owner:CORNING INC

Three-dimensional Gaussian splashing and rasterization pipeline fused view synthesis system and method

The invention discloses a three-dimensional Gaussian splashing and rasterization pipeline fused view synthesis system and method. The method comprises the following steps of: 1, acquiring two-dimensional Gaussian primitives; 2, converting the two-dimensional Gaussian primitive into two triangular grids, and converting the two triangular grids into a world coordinate system; 3, baking the spherical harmonic coefficient of the color and the opacity data in a texture form; 4, enabling each Gaussian primitive to correspond to a texture block on the texture image set, enabling a triangle to cover the texture block in a UV space, and obtaining a Gaussian weight; 5, based on the obtained Gaussian weight, simulating an alpha mixing behavior in the three-dimensional Gaussian splashing pipeline by using a time-based jitter anti-aliasing method; and 6, training a symbol vector field SDF branch while training, and mutually supervising and constraining the output of the symbol vector field and the output of the two-dimensional Gaussian. The three-dimensional Gaussian splash can be rendered in a traditional rasterization pipeline of the unreal engine 4, and the fidelity equivalent to that of a special training pipeline is kept.
Owner:XIDIAN UNIV +1

Infrared night vision AR intelligent glasses based on multispectral fusion

The invention discloses infrared night vision AR (Augmented Reality) intelligent glasses based on multispectral fusion, and relates to the technical field of infrared intelligent application. High-precision scene perception in a low-light / light-free environment is realized by fusing dual-channel data of low-light imaging and infrared thermal imaging and combining cross-modal feature matching and dynamic pose compensation; an environment detail structure is restored by a low-light image enhancement technology, thermal feature targets such as organisms are accurately recognized through thermal imaging target segmentation, and a three-dimensional environment model with space geometric information and target attributes is constructed through heterogeneous feature fusion; and dynamically adjusting the display transparency of the key target in the AR view field through a virtual information layer adaptive mixing mechanism driven by a hot target attribute, and finally outputting a virtual-real fused enhanced view, thereby breaking through the illumination limitation of the traditional AR glasses, and improving the visual effect of the AR glasses. And immersive augmented reality experience with panoramic detail perception and hot target accurate positioning is provided for the user in a dark environment.
Owner:CHANGSHA XINTAI INSTR CO LTD

Ultra-short-term prediction system and method based on image analysis

The invention relates to the technical field of photovoltaic power prediction, in particular to an ultra-short-term prediction system and method based on image analysis, and the system comprises an all-sky imaging data processing module, a cloud layer dynamic feature calculation module, a solar irradiance change prediction module, a photovoltaic power generation power calculation module and a prediction model optimization training module. According to the method, the cloud layer thickness, transparency, movement direction and coverage rate change are calculated, the cloud layer dynamic characteristic analysis precision is enhanced, and the radiation scattering coefficient is calculated in combination with the direct solar light shielding ratio, the cloud layer characteristics and the solar angle, so that the irradiance calculation is more accurate, the illumination change rate is analyzed, and the short-term irradiance trend is dynamically adjusted; the total power is calculated and the shielding influence is adjusted in combination with component arrangement, so that the power prediction is more practical, the input data is normalized, the time sequence sample is enhanced, the dynamic adjustment of the model parameters is optimized, and the adaptive capacity and the prediction stability are improved.
Owner:GUIZHOU QIANYUAN POWER CO LTD +1

Bimodal real-time three-dimensional imaging system and method based on LED light source

The invention discloses a bimodal real-time three-dimensional imaging method based on an LED light source, which is applied to a bimodal real-time three-dimensional imaging system based on the LED light source, and comprises the following steps: step 1, calibrating a calibration plate on an ultrasonic transducer, and obtaining a transformation matrix from a two-dimensional image coordinate system to a calibration plate coordinate system; step 2, moving an ultrasonic transducer to scan an imaging target, synchronously acquiring and reconstructing a two-dimensional ultrasonic image and a two-dimensional photoacoustic image, and tracking and recording pose information of the calibration plate in real time in an optical positioning mode, namely a transformation matrix from a calibration plate coordinate system to a camera coordinate system; step 3, based on the transformation matrix, mapping a two-dimensional ultrasonic imaging result and a two-dimensional photoacoustic imaging result obtained in real time to the same three-dimensional space through coordinate transformation; and 4, respectively adjusting the color and transparency parameters of the ultrasonic and opto-acoustic two modal images, fusing and rendering in real time, and displaying the bimodal three-dimensional image.
Owner:YIXING PEOPLES HOSPITAL +1

Space scattering light field distribution measurement method

The invention discloses a space scattering light field distribution measurement method, which realizes measurement of space scattering light field distribution, and specifically comprises the following steps: S1, a tested sample or a reference sample close to ideal mirror reflection is not placed at a test position, a light source enters at a first angle, and a detector receives and measures light radiation from different angles to obtain light source light field distribution; s2, placing a tested sample at the test position, enabling the light source to enter at a second angle, receiving and measuring light radiation passing through the tested sample from different angles by the detector, and obtaining scattered light field distribution of the tested sample; and S3, decoupling the scattered light field distribution of the tested sample by using the light field distribution of the light source to obtain the corrected scattered light field distribution of the tested sample. According to the invention, the influence of the measurement system on the material scattering light field distribution test is eliminated, and the two-dimensional display detector is introduced for receiving, so that the measurement is more accurate. The method is especially obvious in effect on samples with higher specular reflection or higher transparency.
Owner:TSINGHUA UNIVERSITY +1

Chromium ion doped near-infrared scintillation crystal and preparation method and application thereof

The invention belongs to the technical field of scintillation materials, and particularly relates to a chromium ion doped near-infrared scintillation crystal and a preparation method and application thereof. The chromium ion-doped near-infrared scintillation crystal has a molecular formula of A3B2-xCrxC3O12, x is greater than or equal to 0.005 and less than or equal to 0.1, and after a chromium ion-doped ultraviolet-visible light inorganic scintillator is adopted, light is emitted at the wavelength of 650-950 nm and has good wavelength matching with a silicon photoelectric detector. Besides, single crystal growth is carried out by adopting a Czochralski method, the crystal growth process is optimized, the ion doping concentration is regulated and controlled, the scintillation performance of the chromium ion doped near-infrared scintillation crystal in the near-infrared band is improved, the requirement of the chromium ion doped near-infrared scintillation crystal in the radiation detection field is further met, and the problem that an existing scintillation crystal is low in transparency is solved.
Owner:SHANDONG UNIV

Water transparency measuring device based on optical sensing technology

The invention belongs to the technical field of water transparency measurement, and particularly relates to a water transparency measuring device based on an optical sensing technology, which comprises a saikowski disc, a first connecting block is fixedly connected to the center of the top of the saikowski disc, and a first connecting ball is rotatably mounted at the top of the first connecting block; the top of the first connecting ball is fixedly connected with a measuring rope, the end, away from the saybolt disc, of the measuring rope is connected with a handheld machine, and the bottom of the saybolt disc is provided with a conical first balancing weight. Dual detection of water transparency can be achieved through the pressure sensor and the light intensity sensor, compared with an existing manual measurement mode, errors in the manual detection process are reduced, meanwhile, the horizontal adjustment function of a second balancing weight and a third connecting ball on the light intensity sensor is matched, the measurement precision is improved, and the measurement accuracy is improved. Meanwhile, the convenience during detection is also improved, and the automation of water transparency detection is realized.
Owner:GUANGZHOU HYDROLOGY BRANCH OF GUANGDONG PROVINCIAL HYDROLOGICAL BUREAU

Volume rendering method and system based on WRF output data

The invention relates to the technical field of data three-dimensional visualization, and discloses a volume rendering method and system based on WRF output data, and the method comprises the steps: carrying out the interpolation processing of the WRF output data to improve the data resolution, and building a bounding box; the emergent point and the light direction when the light passes through the bounding box are solved, and the sampling step length is adjusted by using the light length and the resolution; at each sampling point, calculating a color value and an opacity value of the point by adopting a layered resampling method and applying different interpolation methods; and finally, calculating reflectivity and shadow parameters by combining the gray scale and gradient information of the sampling points so as to optimize a transmission function and calculate a final color value of the pixel point. The method provided by the invention can realize efficient and accurate meteorological data volume rendering, has relatively high rendering quality and performance optimization, is suitable for the fields of weather forecast, environmental perception and the like, and can provide powerful technical support for meteorological data analysis and environmental monitoring and prediction.
Owner:GUIZHOU POWER GRID CO LTD

High-temperature high-density plasma generation and radiation opacity measurement method

The invention discloses a high-temperature high-density plasma generation and radiation opacity measurement method, which comprises the following steps: clamping a target material by using low-density low-Z-element foam to form a sandwich structure sample, and synchronously and directly driving the sandwich sample from two sides by using multiple beams of smooth nanosecond laser, the preparation temperature reaches 1,000,000 DEG C, and the electron density reaches 1 * 1023 pieces per cubic centimeter; then generating an X-ray source through the action of one or more nanosecond laser beams and the high-Z material, measuring the absorption spectrum of the X-ray source penetrating through the target plasma, the backlight spectrum of the X-ray source not penetrating through the target plasma and the self-emission spectrum of the target plasma through a spectrograph, and finally realizing the measurement of the radiation opacity of the high-temperature and high-density plasma. The high-temperature and high-density plasma radiation opaqueness measurement device has the beneficial effects that the high-temperature and high-density plasma radiation opaqueness measurement of which the temperature reaches 1,000,000 DEG C and the electron density reaches 1 * 1023 per cubic centimeter is realized on a million-joule nanosecond laser device.
Owner:LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS

Water resource information acquisition method based on remote sensing image

The invention discloses a water resource information acquisition method based on a remote sensing image, which belongs to the technical field of image recognition, and specifically comprises the following steps: firstly, acquiring remote sensing image data of a target water area, and constructing a dynamic substrate spectrum template library by acquiring actually measured spectrum reflection curves of different substrate types in a water-free state; secondly, for each spatial position in the image, matching exposed substrate types of adjacent areas according to geographic coordinates, and extracting corresponding spectral features from a template library as basic reflection reference; establishing a light propagation path separation model, simulating a process that sunlight penetrates through a water layer and returns to a sensor through substrate reflection, and generating a substrate reflection contribution component in combination with basic reflection reference; and finally, deducting the contribution component from the spectral reflectivity to obtain a pure water optical response value, and outputting a water transparency parameter distribution diagram of each spatial position of the target water area according to a physical correlation model of the pure water optical response value and the water transparency. According to the invention, reliable remote sensing acquisition of shallow water transparency is realized.
Owner:SUZHOU BRANCH OF JIANGSU PROVINCIAL BUREAU OF HYDROLOGY & WATER RESOURCES SURVEY

High-gain vehicle-mounted optical transparent antenna with improved directional diagram

This invention discloses a high-gain vehicle-mounted optically transparent antenna with improved radiation pattern, operating in the 0.74-0.87 GHz range. The invention includes a substrate, an antenna body, and a system ground plane. The substrate comprises a PET film layer, an OCA adhesive layer, and a PC dielectric substrate. The antenna body consists of two trapezoidal radiating patches, a reverse cancellation strip, a feed line, and a system ground plane located on the same layer as the antenna. The two trapezoidal radiating patches are connected by the reverse cancellation strip, which links their longer base edges. Its transparency is primarily achieved through the use of a transparent substrate material and a metal mesh structure composed of thin and fine metal wires. The cascaded trapezoidal radiating patches and the connected reverse radiation strip achieve performance improvements such as high gain, wide bandwidth, and improved horizontal radiation pattern nulls. This invention can achieve optical transparency of over 70%, radiation efficiency of over 65%, and radiation pattern null improvement of over 3 dB in the operating frequency band.
Owner:HANGZHOU FANLI TECHNOLOGY CO LTD

Performance of ray-traced shadow creation within a scene

A ray (e.g., a traced path of light, etc.) is generated from an originating pixel within a scene being rendered. Additionally, one or more shadow map lookups are performed for the originating pixel to estimate an intersection of the ray with alpha-tested geometry within the scene. A shadow map stores the distance of geometry as seen from the point of view of the light, and alpha-tested geometry includes objects within the scene being rendered that have a determined texture and opacity. Further, the one or more shadow map lookups are performed to determine a visibility value for the pixel (e.g., that identifies whether the originating pixel is in a shadow) and a distance value for the pixel (e.g., that identifies how far the pixel is from the light). Further still, the visibility value and the distance value for the pixel are passed to a denoiser.
Owner:NVIDIA CORP

Optical window pollution self-immunization water body transparency detector

ActiveCN121347388BSolve the core pain points of the industryGuaranteed accuracyTransmissivity measurementsBeam splitterPhotovoltaic detectors
The application discloses the technical fields of environmental monitoring and water analysis and relates to a water transparency detector with self-immunization of optical window pollution, which comprises a light source, a first reflector, a beam splitter, a sample cell, a second reflector and a third reflector. The first reflector reflects the light of the light source to the beam splitter, and the beam splitter divides the light into transmitted light and reflected light. The transmitted light transmits through the sample cell and is converged by the second reflector to a transmitted end photoelectric detector. The reflected light is converged by the third reflector to a reference end photoelectric detector. The water transparency can be calculated according to the light intensity of the transmitted end photoelectric detector and the reference end photoelectric detector. The application dynamically offsets the error caused by the optical window pollution, light source fluctuation and detector drift through a double-light-path signal and a clean and polluted window pollution error double-ratio real-time compensation algorithm, so that the measurement accuracy can be ensured without a physical cleaning device. In addition, the application can monitor the change trend of the light intensity ratio and actively sense the degree of optical window pollution.
Owner:TONGJI UNIV

Optical window pollution self-immune water transparency detector and detection method

The invention discloses an optical window pollution self-immune water transparency detector and a detection method in the technical field of environmental monitoring and water analysis. The optical window pollution self-immune water transparency detector comprises a light source, a first reflecting mirror, a spectroscope, a sample pool, a second reflecting mirror and a third reflecting mirror, the first reflector reflects light of the light source to the spectroscope, and the spectroscope divides the light into transmission light and reflected light. Transmission light penetrates through the sample cell and is converged to a transmission end photoelectric detector by a second reflector; the reflected light is converged to a reference end photoelectric detector by the third reflector; and the water transparency can be calculated according to the light intensity of the transmission end photoelectric detector and the reference end photoelectric detector. According to the invention, errors caused by optical window pollution, light source fluctuation and detector drift are dynamically counteracted through a double-optical-path signal and a pollution error double-ratio real-time compensation algorithm of a clean and polluted window, the measurement accuracy can be ensured without a physical cleaning device, the change trend of a light intensity ratio can be monitored, and the measurement accuracy is improved. And the pollution degree of the optical window is actively sensed.
Owner:TONGJI UNIV

A water body transparency measurement system, method, device, medium, and program product

The embodiment of the application provides a kind of water transparency measurement system, method, equipment, medium and program product, it is related to water quality detection technical field, the system includes: measuring equipment and electronic equipment;Measuring equipment is obtained by gathering in the process of sinking from water surface into the water to be measured water data sequence including multiple groups of water data, each group of water data includes the light intensity data and water depth data collected at the same time;Electronic equipment inputs water data sequence into water transparency calculation model, obtains the water transparency that water transparency calculation model is based on water data sequence output.In the above system, water transparency is obtained by the light intensity data and water depth data of objective measurement, and is calculated by water transparency calculation model, and does not need to rely on the subjective visual observation of measurement personnel, to ensure the objectivity and consistency of measurement process, and obtain accurate water transparency measurement result.
Owner:SHANGHAI WANJIANG ENVIRONMENTAL TECH CO LTD

Edge-lens-array-based transparent tomographic imaging method and sensing device

The present application relates to the field of optical sensing technology, and provides a transparent tomographic imaging method based on an edge convex lens array, which receives an incident light source at a first end face to generate a first light signal, and the first light signal is transmitted along the first end face to a circumferential side face. The first light signal is encoded by a convex lens array structure arranged at the circumferential side face, and at least one group of second light signals is obtained after encoding. The second light signal is sensed by at least one optical detection module. The optical detection module transmits the second light signal to a signal reconstruction module for tomographic reconstruction to obtain a third light signal. The present application also discloses a sensing device. The method and the sensing device can transfer the sampling and encoding process of the light signal from a plane to an edge region of an imaging plane, realize angle-related optical encoding of the in-plane propagating light signal, and obtain an imaging result through tomographic reconstruction. Thus, the technical problems of limited transparency and limited resolution in the existing transparent imaging scheme are overcome.
Owner:MACAU LIPUL INFORMATION TECHNOLOGY CO LTD

Asteroid global terrain three-dimensional reconstruction method for illumination change

The present application relates to a kind of asteroid global terrain three-dimensional reconstruction method for illumination change, comprising the following steps: input asteroid optical image, estimate camera pose and generate sparse point cloud, initialize Gaussian radiation field;Using image segmentation large model outputs the segmentation mask of asteroid optical image, prunes Gaussian radiation field;In combination with the mixed mask output by Gaussian radiation field, identify the shadow area of asteroid surface;The camera position, spherical harmonic coefficient and hash coding are combined into incident light angle, input into neural network, and the color value of Gaussian cell of illumination and shadow area is regressed;Add depth normal consistency loss and rotation variance and scale constraint loss, combine photometric loss to jointly supervise the optimization of Gaussian radiation field, calculate Gaussian opacity field, extract the three-dimensional model of asteroid global terrain.The present application can identify the shadow area on asteroid, improve the three-dimensional reconstruction precision of asteroid with surface illumination change.
Owner:BEIHANG UNIV

High-load transparent rare earth complex organic glass scintillator and preparation method and application thereof

The invention discloses a high-load transparent rare earth complex organic glass scintillator as well as a preparation method and application thereof. The scintillator comprises a polymer matrix and an ionic rare earth complex dispersed in the polymer matrix, the rare earth complex comprises coordination anions and ionic liquid cations, the coordination anions comprise rare earth ions and organic ligands, and the loading capacity of the rare earth complex in the polymer matrix can reach 80-90 wt%. According to the scintillator, an ionic liquid is introduced to construct an ionic supramolecular structure, effective isolation of a luminescence center is realized by utilizing steric hindrance and a charge shielding effect, concentration quenching is inhibited, and compatibility with a matrix is enhanced, so that the material still keeps transparency of 90% or above under an ultrahigh load. The maximum radiation luminous intensity of the scintillator is 23.9 times that of commercial LYSO, the lower detection limit is as low as 56nGy / s, and the scintillator is suitable for the fields of high-energy particle detection, X-ray imaging and the like.
Owner:XIAMEN UNIV

User device incorporating multi-sensing sensor device

To perform, for example, biometric authentication and heart rate determination using a single sensor device.SOLUTION: A user device 210 includes a sensor window 410. The sensor window includes a substrate 420 and a layer set disposed on the substrate. The layer set includes a first layer subset having a first refractive index and a second layer set having a second refractive index different from the first refractive index, and has a threshold transmittance in a sensing spectral range and is configured to be a particular color in a visible spectral range, and has a threshold opacity in the visible spectral range. The device also includes a spectral sensor device 220 including at least one sensor element array 430 that is aligned with the sensor window and is configured to receive light in the sensing spectral range to provide a plurality of sensing functions based on at least one measurement of the light in the sensing spectral range.SELECTED DRAWING: Figure 4
Owner:VIAVI SOLUTIONS INC(US)

Organic glass scintillator material and preparation method and application thereof

The invention discloses an organic glass scintillator material as well as a preparation method and application thereof. The material comprises a dynamic covalent cross-linked polymer network formed by reaction of an epoxy monomer containing a halogenated conjugated group, a polyfunctional carboxylic acid curing agent or a polyfunctional anhydride curing agent and a transesterification catalyst. According to the invention, through molecular structure design, the cross-linked network unit has the characteristic of intrinsic radiation luminescence, a luminescent object does not need to be physically doped, and the bottlenecks of easy precipitation, easy phase separation, low optical transparency and the like of the traditional doped scintillator are fundamentally solved. The obtained material has efficient radiation luminescence and high transparency, and the imaging spatial resolution is remarkably improved. Meanwhile, the topological rearrangement characteristic of the dynamic ester bond is utilized, the defect that the thermosetting scintillator cannot be recycled is overcome, and self-repairing, morphology customization and cyclic remodeling of the device are achieved. The method is simple in preparation process and has important significance in the fields of X-ray imaging, nondestructive testing and the like.
Owner:XIAMEN UNIV

Transparent display screen with variable opacity

A transparent display screen is disclosed, and may include a transparent substrate, a pixel layer, a full-area opacity layer, and a plurality of electrodes. The transparent substrate may define a display plane and a display direction perpendicular to the display plane. The pixel layer may be supported on the transparent substrate and may have a plurality of opaque light-emitting diodes arranged at a distance from one another in the display plane. The full-area opacity layer may be formed in the transparent substrate and may be arranged behind the display plane with respect to the display direction and extending parallel to the display plane. The plurality of electrodes may be arranged in the full-area opacity layer and behind the opaque light-emitting diodes with respect to the display direction.
Owner:AUDI AG