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60 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.

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

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

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

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

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

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

Space target three-dimensional reconstruction method for suppressing dark color interference through combination of brightness and transparency

PendingCN121999140Aquick estimateeffective estimateImage enhancementImage analysisPattern recognitionImaging quality
The invention belongs to the field of space target imaging, and discloses a space target three-dimensional reconstruction method for inhibiting dark color interference through combination of brightness and transparency, which is used for solving the problems of poor imaging quality and inaccurate pose estimation of a space target. According to the method, multiple requirements of improving the quality of an input image, adjusting a pose and training a three-dimensional model are jointly completed, and low-quality imaging of an incomplete imaging system is preprocessed based on lucky imaging; and then, dense feature points are extracted by using a pre-training network based on no detector, estimation of a three-dimensional initial point cloud and an initial pose of a camera is carried out, and pose joint adjustment is carried out by combining RANSAC and Bundle AdJustlement. During training, an MLP-based optimizer is used for calculating the deviation of pose adjustment, meanwhile, training of parameters of three-dimensional Gaussian primitives is carried out, and after various physical constraints are added, a one-stop assembly line can be implemented. According to the method, the good basic shape and the sharp edge of the model are kept, the good anti-noise capability is achieved, and meanwhile the real-time performance and the robustness are achieved.
Owner:GUANGDONG UNIV OF TECH

A device and system for improving underwater light conditions in a lake

ActiveCN116446355BBarrages/weirsCultivating equipmentsEutrophicationWater transparency
The present application relates to the field of eutrophication lake water ecological restoration, and discloses a device and system for improving underwater light conditions of a lake. Natural light on the water surface is introduced into the underwater area near the device through refraction and reflection by using a light path system, effectively improving the underwater light intensity. A wave dissipation system is arranged below the light path system to prevent disturbance of the water body and sediments by small waves, to a certain extent, reducing the influence of sediments and resuspension on water transparency, and further improving the underwater light conditions. The light path system, the wave dissipation system and the underwater fixing system are sequentially fixed and connected from top to bottom, and the height of the light path system and the wave dissipation system is adjusted through the underwater fixing system with the rise and fall of the water surface, improving the applicability of the device. The device has the characteristics of simple structure, convenient operation, good performance, easy installation and recycling, etc. It can effectively reduce the adverse effects of insufficient underwater light of the lake and wave disturbance on the growth of submerged plants.
Owner:WUHAN MUNICIPAL CONSTR GROUP

T-shaped ultra-wideband transparent antenna based on coplanar waveguide feed and design method thereof

The invention discloses a coplanar waveguide feed-based T-shaped ultra-wideband transparent antenna and a design method thereof, and belongs to the technical field of ultra-wideband transparent antennae, the coplanar waveguide feed-based T-shaped ultra-wideband transparent antenna comprises a transparent dielectric substrate, and a coplanar waveguide feed structure, a radiation unit and a grounding plate structure are integrated on the same surface of the transparent dielectric substrate; the radiation unit is a T-shaped composite radiation patch; the grounding plate structure comprises two L-shaped windows, and the L-shaped windows are formed in the large-area grounding plane; and the two L-shaped windows are symmetrically distributed about the central longitudinal axis of the antenna and form partial projection overlapping with the T-shaped composite radiation patch. Through the collaborative design of the specific T-shaped composite radiation patch and the symmetrical L-shaped window, a plurality of resonant modes are effectively excited and deeply fused, so that the bandwidth limitation of the transparent antenna is overcome, and a key component is provided for a transparent integrated communication terminal; the whole structure is compact, the transparency is high, and stable and efficient ultra-wideband work can be achieved within the frequency band ranging from 4.7 GHz to 7.45 GHz.
Owner:SOUTHWEST JIAOTONG UNIV

SENSOR WINDOW.

ActiveMX435167BVisible spectral rangeRefractive index
A sensor window may include a substrate and a set of layers placed on the substrate. The set of layers may include a first subset of layers with a first refractive index and a second set of layers with a second refractive index different from the first. The set of layers may be associated with a threshold transmittance in a perceptible spectral range. The set of layers may be set to a particular color in a visible spectral range and may be associated with a threshold opacity in the visible spectral range.
Owner:VIAVI SOLUTIONS INC(US)

System for automatically measuring water transparency in light-limited scene and operation method

The invention belongs to the technical field of water body measurement, and particularly relates to an automatic water body transparency measuring system in a light-limited scene and an operation method.The measuring system comprises a saishi disc and a winch, the saishi disc is connected with the winch through a rope, a balancing weight is arranged on the saishi disc, the measuring system further comprises a fixing cylinder, and the fixing cylinder is connected with the winch through a rope. The saybolt disc and the winch are both arranged in a barrel cavity of the fixed barrel, a light source, a camera and ultrasonic detection equipment which are located above the saybolt disc are arranged in the barrel cavity, the barrel wall of the fixed barrel is hollowed out, and the camera and the ultrasonic detection equipment are in signal connection with a processor. The measuring system and method can supplement light to the surrounding environment of the water body, reduce the influence of light limitation on measured data, accurately and automatically measure the transparency of the water body in real time, and contribute to formulating a unified judgment standard for the measurement of the transparency of the water body.
Owner:JIANGSU WATER CONSERVANCY SCI RES INST

Multilayer structure with light transmittance and opacity, and method for manufacturing the same.

To provide a method for manufacturing a multilayer structure that is simple in its manufacturing process, low in cost, highly efficient, and exhibits good light transmission and display effects in a multilayer structure. [Solution] A method comprising the steps of: applying a transparent liquid coating to one side of a transparent carrier film; pressing a projection of a transfer mold onto the liquid coating and curing it, and then peeling off the transfer mold after curing to form a recess in the cured liquid coating that conforms to the shape of the projection, thereby obtaining a recessed transparent layer; printing a light-shielding layer on the surface other than the recess by a planar printing process, thereby having a first through-hole in the light-shielding layer at a position corresponding to the recess and communicating with the recess; and printing a decorative layer on the surface other than the first through-hole by a planar printing process, thereby having a second through-hole in the decorative layer at a position corresponding to the first through-hole and communicating with the first through-hole, the second through-hole communicating with the recess through the first through-hole to form a light-transmitting hole, thereby obtaining a multilayer structure.
Owner:深せん市億銘粤科技有限公司

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

The present application relates to the technical field of three-dimensional reconstruction, and in particular to a near-infrared assisted low-light scene three-dimensional reconstruction method based on 3D Gaussian splash, which uses near-infrared images with high signal-to-noise ratio to guide the generation of Gaussian ellipsoids, thereby providing a stable geometric basis for the area where visible light information is missing; in the rendering stage, near-infrared rendering images and normal visible light rendering images are respectively generated through the sharing of geometric parameters of Gaussian ellipsoids and the opacity and color attributes of the two modalities; through cross-modal structural similarity loss, the rendered normal visible light image is forced to be structurally aligned with the near-infrared light image, the recovery process of the color of the visible light image is strictly constrained by clear near-infrared structural information, and the accuracy and authenticity of the restoration result are ensured.
Owner:ZHEJIANG UNIV

Optical elastomer with tensile induced dual-mode response as well as preparation method and application of optical elastomer

The invention discloses a tensile induced dual-mode response optical elastomer and a preparation method and application thereof, and belongs to the technical field of optical anti-counterfeiting materials. The invention designs and prepares an optical elastomer compounded by CaF2: Ce < 3 + >, Tb < 3 + > hollow nanospheres and polydimethylsiloxane. Based on interface refractive index matching regulation and control of CaF2: Ce < 3 + >, Tb < 3 + > hollow nanospheres and a PDMS matrix, the optical elastomer shows synchronous transparency and photoluminescence intensity response performance in a mechanical deformation process. Through systematic experimental analysis, an optical signal regulation and control mechanism induced by mechanical deformation is clarified, and the regulation and control rule of structural parameters of the CaF2: Ce < 3 + >, Tb < 3 + > hollow nanospheres on optical signals is disclosed. Finally, by designing an optical anti-counterfeiting model, the application potential of the optical anti-counterfeiting model in the anti-counterfeiting field is proved.
Owner:GUANGZHOU UNIVERSITY

Substrate and processing method, system and equipment thereof, storage medium and program product

The invention relates to a substrate and a processing method and system thereof, computer equipment, a computer readable storage medium and a computer program product. The method is applied to a substrate processing system, the substrate processing system comprises an optical multi-focus generator, a focus lens and a processing platform, the processing platform is used for placing a to-be-processed substrate, and the transparency of the to-be-processed substrate is greater than a preset transparency threshold; the method comprises the steps that a light beam emitted by a laser is received through an optical multi-focus generator, the light beam is separated at different diffraction orders based on a preset focus slope, and the focus slope is used for adjusting the vertical axial position of a focusing light spot; according to the method, light beams of different diffraction orders are converged through a focusing lens based on a preset focusing lens focal length, focusing light spots are formed on a focusing processing area of a to-be-processed substrate, the focusing light spots are used for processing the to-be-processed substrate, and the focusing lens focal length is used for adjusting the axial position of the focusing light spots. By adopting the method, the processing yield can be improved.
Owner:HANS CNC SCI & TECH

High transparency, high haze nanostructured structures

The invention relates generally to optically high transparency and high haze structures and, more particularly, to plastic, e.g., polymer, and glass structures having a sub-wavelength texture formed on a surface thereof, which is effective to impart the optical properties of high transparency and high haze to the structures. The texture is in a grass-like or needle-like form. Additionally, the optically high transparency and high haze structures may include a transparent conductor. Furthermore, the glass structures may exhibit a self-cleaning function.
Owner:UNIV OF PITTSBURGH OF THE COMMONWEALTH SYST OF HIGHER EDUCATION +1

Method and measuring device for checking at least one component made of an at least partially transparent material

The invention relates to a method and to a device for checking a component (10) made of an at least partially transparent material for defects (11) present in or on the component, in which method the component (10) is transilluminated from one side by means of light emitted from an IR light source (1) in such a way that the light exiting the component (10) on the opposite side is recorded in the form of an image by an IR camera (2), the image information from which is analyzed by an electronic analysis unit (4) via image processing with respect to defects (11) which differ from the immediate image environment with respect to shape, size, and / or degree of transparency.
Owner:ROBERT BOSCH GMBH

A volumetric cloud rendering method and system based on 3D Gaussian splashing

ActiveCN121280588BBiological models3D-image renderingPoint cloudRadiative transfer
This invention discloses a volumetric cloud rendering method and system based on 3D Gaussian splashing. The method includes: using the SfM algorithm to perform feature matching and structure reconstruction on the volumetric cloud image to obtain sparse point clouds in the scene, represented as anisotropic Gaussian ellipsoids; decomposing the illumination transmission process of the volumetric cloud into two parts, forward single scattering and internal multiple scattering, based on the radiative transfer equation, and embedding the illumination modeling formula into the volumetric cloud rendering process; determining the contribution of each 3D Gaussian ellipsoid to the rendering result based on its opacity index, and using a delayed deletion strategy to dynamically prune low-contribution 3D Gaussian ellipsoids to reduce redundancy; constructing a comprehensive loss function to focus the 3D Gaussian model on the volumetric cloud region and enhance the ability to restore structural details; and outputting the optimized volumetric cloud rendering result and the 3D Gaussian model. This invention effectively improves the efficiency and quality of volumetric cloud rendering while ensuring real-time rendering.
Owner:NANJING UNIV OF INFORMATION SCI & TECH

Water transparency monitoring method and equipment based on turbidity measurement

PendingCN121933439ATransmissivity measurementsWater transparencyContinuous monitoring
The invention provides a water transparency monitoring method and equipment based on turbidity measurement, belongs to the technical field of water environment monitoring, and aims to solve the problems of poor accuracy and stability of a monitoring result caused by poor fitting degree of a conversion model and neglect of environment illumination interference in the prior art. The method comprises the following steps: collecting an original turbidity value of a water body, water surface incident illumination intensity, a weather type and a water body type; compensating and correcting the original turbidity value based on the collected parameters to obtain a compensated turbidity value; and substituting the compensated turbidity value into a preset power exponent relational expression, and calculating to obtain the transparency of the water body. The equipment comprises an acquisition module and a processing module and is used for executing the method. According to the invention, through a strategy of first compensation and then conversion, the ambient light interference is effectively offset, the monitoring precision and stability of the full turbidity interval are improved, and low-cost and automatic continuous monitoring can be realized.
Owner:上海宏波工程咨询管理有限公司

Device for visually indicating excess temperature and method for manufacturing same

The invention relates to devices for visually recording the fact of excess of temperature, namely to devices for recording the fact of excess of temperature above at least one threshold value, the operating principle of which is to change the microstructure of a heat-sensitive material at given threshold temperature values, accompanied by an irreversible visual effect, as well as variants of the method for manufacturing this device. The device for visually recording the excess of temperature above at least one threshold value, having a layered structure including: —a base that is non-transparent to at least part of visible light, on the front surface of which inscriptions are applied indicating at least one numerical threshold temperature value; —at least one temperature-sensitive material that is non-transparent to at least part of visible light, applied to individual sections of the base, the microstructure of which includes particles of solid organic substance and voids filled with the gas phase; —a transparent protective layer that partially or completely covers the front surface of the device. In this case, the device is designed with the ability to irreversibly change its appearance upon reaching at least one threshold temperature indicated on it due to the destruction of the microstructure of the corresponding heat-sensitive material, accompanied by the fusion of particles of solid organic substance, a decrease in the fraction of voids and an increase in its transparency with the development of the color of the base. Variants of a method for manufacturing the device for visually recording the excess of temperature above at least one threshold value are also disclosed. The group of inventions provides for an increase in the reliability and accuracy of visually recording the fact that the temperature has exceeded at least one threshold value, the impossibility of returning the heat-sensitive material to its original state, an increase in the operating speed of the heat-sensitive material, including under conditions of short-term peak loads of controlled equipment elements or emergency operating modes, as well as an increase in the safety of operation of both the controlled equipment and the recording device itself throughout its entire service life.
Owner:LLC TERMOELEKTRICA

Method for evaluating transparency of skin

The present invention relates to a method for evaluating the transparency of skin, the method comprising irradiating evaluation skin with irradiation light and quantifying, by simulation, the amount of irradiation light that has reached a specific penetration depth. The simulation is based on the intensity of reflected light and uses the attenuation coefficient of the skin and the albedo of the skin.
Owner:ROHTO PHARM CO LTD +1

Design method of mid-wave infrared multispectral polarizer array of si-based metasurface structure

This invention discloses a design method for a mid-wave infrared multispectral polarizer array based on a Si-based metasurface structure, belonging to the fields of micro-nano optics, multispectral, and polarization imaging technology. This invention achieves linear polarization-selective response by designing a nanoscale metasurface structure and utilizing it to modulate the spectrum, enabling the integration of a photodetector with a high linear polarization extinction ratio at key wavelengths. This achieves spectral manipulation without the need for traditional filters, offering advantages such as simple optical path, high integration density, and device miniaturization. This invention integrates a Si wire-grating metasurface, which exhibits ultra-wide absorption spectrum characteristics with full transmission in the TM polarization direction and wavelength-selective opacity in the TE polarization direction, with a photodetector, solving the problem of low absorptivity in photodetectors. By changing the dimensional parameters of the Si wire-grating metasurface structure, this invention modulates the absorption spectrum of the photodetector, achieving multispectral narrowband detection with a high linear polarization extinction ratio in the mid-wave infrared, which is beneficial for improving the spectral selectivity of infrared polarization detectors.
Owner:BEIJING INST OF TECH

Optically transparent linearly polarized millimeter wave reflectarray based on low-loss dielectric substrate

The application discloses a light-transparent linear polarization millimeter wave reflectarray based on a low-loss dielectric substrate and belongs to the field of wireless communication system electronic devices. The reflectarray antenna unit adopts a two-dimensional triangular periodic arrangement, and the array sparsification and sidelobe suppression requirements are considered. The application adopts a metal grid with reduced metal area and full-transparent dielectric material to improve the light transparency of the antenna. While the electromagnetic performance is ensured, the antenna transparency is improved. In the design process, full-planarization design is adopted, all metal structures transfer energy through electromagnetic coupling, the processing complexity is effectively reduced, and problems such as transparency reduction caused by metal via holes are avoided. The light-transparent reflectarray antenna has good transparency and is easy to integrate, and has a wide application prospect in the field of satellite communication.
Owner:SOUTHEAST UNIV

A 0.1nm-3nm ultra-fine beam control and lithography method based on transverse light field, surface ultra-thin light shielding slit and close-to-light-emitting

This invention discloses a 0.1nm–3nm ultra-fine beam control and lithography method, relating to the fields of ultra-fine beam directional transmission and ultra-fine lithography. This invention filters stray light through radial feature separation of the light source, employs transverse light transmission along the surface of a transparent medium, and combines this with an ultra-thin surface-shielding slit confinement, abandoning the traditional deep longitudinal channel. The 0.1nm-level slit is achieved using atomic-level natural gaps combined with ALD modification, with the slit's light-emitting end face closely attached to the target surface (0.1nm–1nm spacing). Combined with high-frequency surface acoustic wave stabilization and AFM-grating joint alignment, beam offset and drift are reduced by at least 90%, and alignment accuracy is improved by at least 80%. The core innovation is "full-domain low-loss opacity constraint," breaking existing technological biases and differing from traditional near-field lithography logic. It utilizes mature processes for large-scale mass production, and the core technology can be extended to multiple fields, solving existing technological pain points.
Owner:常乐

Ionic rare earth complex scintillator glass as well as low-temperature melting preparation method and application thereof

The invention relates to the technical field of photoelectric materials and scintillators, and particularly discloses ionic rare earth complex scintillator glass as well as a low-temperature melting preparation method and application thereof. According to the invention, a low-temperature melting and quenching process is developed, the crystalline ionic europium complex is directly melted and rapidly cooled under a solvent-free condition, and direct preparation of the ionic rare earth complex transparent scintillator glass is realized. The prepared glass scintillator material has high transparency, high luminous efficiency, high rare earth content and excellent machinability, light scattering caused by particle aggregation and phase separation in a traditional composite film is fundamentally eliminated, and the concentration quenching limitation is broken through. The glass scintillator material shows excellent luminescence performance under X-ray excitation, and the imaging resolution and the detection sensitivity can be remarkably improved. The invention provides a feasible technical path for the development of a novel rare earth scintillator material, and has important application prospects in the fields of medical imaging, nondestructive testing, high-energy radiation detection and the like.
Owner:XIAMEN UNIV

Wind field three-dimensional visualization rendering method and device, equipment and medium

The invention discloses a wind field three-dimensional visualization rendering method, device and equipment and a medium, and the method comprises the steps: generating a one-dimensional texture array according to pre-collected wind field data and a preset three-dimensional grid; simulating that a plurality of light rays penetrate through a preset three-dimensional wind field bounding box, traversing each light ray according to the one-dimensional texture array and a preset one-dimensional transmission function lookup table, and sampling each stepping point along the direction of each light ray, stopping sampling in the direction of the corresponding light and outputting the color and opacity of the corresponding light until it is detected that the opaque object shields the corresponding light or the corresponding light meets a preset light stepping condition; and when the color and opacity of each light ray are obtained, realizing three-dimensional visual rendering of the wind field according to the corresponding color and opacity of each light ray. According to the method, the rendering efficiency and the scene fusion degree of wind field three-dimensional visual rendering can be improved.
Owner:GUANGZHOU FRONTOP DIGITAL ORIGINALITY TECH CO LTD

Infrared optical superposition monocular telescope based on optical waveguide

The utility model provides an infrared optical superposition monocular telescope based on an optical waveguide. The telescope comprises an optical waveguide, an infrared lens, a light sensing window, a projection lens, a mode knob, a beam combiner, a focal length knob, a relay lens, a common eyepiece and the like. The telescope adopts a monocular design, the superposition effect of infrared and visible light images can be observed through the common eyepiece, and the observation convenience and accuracy are remarkably improved; the light sensing window can automatically adjust the display brightness of the infrared image according to the ambient light intensity, and it is ensured that clear and comfortable observation pictures can be provided under different illumination conditions. The mode knob supports rapid switching of a white heat mode, a highlighting mode and a contour mode, and observation requirements in different scenes are met; the focal length knob can adjust the focal length to meet the imaging requirements of targets with different distances. According to the utility model, the high transparency of the optical waveguide is utilized, images of two different wave bands can be superposed together, and the problems of complexity in image switching and the like of the existing infrared binocular telescope are solved.
Owner:ZHEJIANG IMAGE QUALITY TECH CO LTD