111 results about "Optical refraction" patented technology

The invention relates to the technical field of plant phenotype image processing, and particularly discloses a colloid culture plant root system three-dimensional characteristic quantification method and device, which are used for solving the problem that rapid and lossless three-dimensional observation and accurate analysis on a plant root system are difficult to realize by the existing traditional root system measurement tool and measurement method. The method comprises the following steps: culturing a plant root system under a colloid medium, acquiring a plant root system image, pre-processing the plant root system image, performing three-dimensional reconstruction on the plant root system based on SFM and NeRF algorithms, automatically extracting plant root system characteristics based on a three-dimensional reconstruction model, and integrating an optical calibration tank device into an imaging system. The optical refraction of the curved surface of the glass culture bottle can be effectively corrected, a three-dimensional point cloud is reconstructed in combination with a high-precision three-dimensional reconstruction algorithm, lossless in-situ measurement is realized, the dynamic growth process of a root system is captured, and the morphology and distribution characteristics of the root system are analyzed.

The invention relates to the technical field of image data processing, in particular to a water-soluble fertilizer dissolution rate visual measurement method and system, and the method comprises the steps: obtaining a sequence image of a dissolution process; performing multi-scale frequency domain analysis on the image, and calculating a scale convergence index by using the deviation between a local phase and a weighted average phase; a spectral sharpness factor is calculated according to the ratio of the high-frequency energy response to the low-frequency energy response; fusing the scale convergence index and the spectral sharpness factor to obtain a solid boundary probability; segmenting the particle region based on the probability and converting the particle region into physical mass, and differentiating a mass change sequence to obtain a dissolution rate. By fusing the phase consistency and the frequency domain energy distribution characteristics, the physical entity edge and the optical refraction halo are effectively distinguished, the refraction interference problem during high-concentration dissolution is solved, and the dissolution rate measurement accuracy is improved.

The utility model discloses a lens for correcting hyperopia defocus and providing local defocus optical signal stimulation, which comprises an annular focal plane substrate and a defocus signal stimulation area, the defocus signal stimulation area is positioned on the surface of the annular focal plane substrate, and an optical refraction area of the annular focal plane substrate comprises a central equal diopter area, a middle correction area and an edge foot correction area; the out-of-focus signal stimulation area is composed of micro-lens structures which are distributed in an annular mode. The utility model has the beneficial effects that the ring focus curved surface is adopted to correct the hyperopia defocus, the harm of the hyperopia defocus to the deepening of the myopia of human eyes is relieved, and meanwhile, the edge position of the lens is fully corrected, so that the observation of the human eyes is clearer; the out-of-focus signal stimulation area can provide positive or negative out-of-focus optical signal stimulation and is used for stimulating the forward or backward movement trend of the retina, four types of out-of-focus amounts are adapted according to human eye adjusting force, more people are adapted, and myopia can be managed more effectively.

An optical arrangement receives output light emanating from an object disposed within a fluid column that crosses an optical refraction boundary of the fluid column between the object and the optical arrangement. The optical arrangement modifies the output light such that the modified output light has an intensity that is more uniform than the output light.

The invention discloses a wafer cleaning liquid concentration dynamic monitoring system, and belongs to the technical field of semiconductor manufacturing. Aiming at the problems of large single parameter measurement error, poor equipment adaptability and frequent maintenance in the prior art, the invention provides a multi-physics field fusion detection scheme: acquiring ion concentration characteristics through a multi-frequency conductivity detection module (0.1 kHz to 10MHz), eliminating environmental interference in combination with a temperature-viscosity joint compensation module, and calculating the concentration of the ion in the multi-frequency conductivity detection module. An optical refractive index auxiliary verification module is used to realize cross verification, and a CNN-LSTM fusion model optimized by transfer learning is used to improve cross-device prediction precision. According to the innovativeness of the system, an anti-corrosion annular electrode array (titanium alloy iridium-plated) supports dynamic distance adjustment and pulse self-cleaning, an ultrasonic defoaming unit (1-3 MHz frequency self-adaption) restrains bubble interference, and a self-calibration module triggers online maintenance based on the conditions of the electrode impedance change rate (larger than or equal to 5%), temperature fluctuation and the like. Experiments show that the concentration measurement precision is improved to + / -0.5%, the HF / O3 rate ratio is controlled to be (1: 2.5 + / -0.3), the number of residual particles on the surface of the wafer is smaller than or equal to 5 per square inch, the service life of the electrode is prolonged to 8 months, and the yield is improved by 0.6%. The method is suitable for a wafer production line of 12 inches and above, and has the advantages of high precision, strong anti-interference and low maintenance cost.

A strip-loaded optical waveguide includes a slab layer, a strip layer, and a cladding region. The slab layer has a first optical refractive index and a first width measured in a transverse direction that is perpendicular to a light propagation direction through the strip-loaded optical waveguide. The strip layer is disposed above the slab layer. The strip layer has a second optical refractive index and a second width as measured the transverse direction. The second width is less than the first width of the slab layer. The second optical refractive index is less than the first optical refractive index of the slab layer. The cladding region is disposed above the slab layer and above the strip layer. The cladding region has a third optical refractive index that is less than the second optical refractive index of the strip layer.

The invention provides an optical anti-counterfeiting film with a three-dimensional dynamic display effect, the minimum function structure of the optical anti-counterfeiting film comprises a first Moire image layer, a transparent optical refraction layer and a second Moire image layer which generates a Moire effect with the first Moire image layer, one of two coherent Moire images is processed on the front surface of the transparent optical film, and the other of the two coherent Moire images is processed on the rear surface of the transparent optical refraction layer. And the other one of the two coherent Moire images is processed at the corresponding position of the rear surface, and the period of the Moire image has a strict mathematical relationship with the refractive index n of the optical transparent material and the thickness h of the optical transparent material, so that a three-dimensional dynamic pattern effect capable of being observed by naked eyes is realized. According to different processing methods, the manufacturing method of the optical anti-counterfeiting film and the product of the optical anti-counterfeiting film can be realized from the cost of common printing to the cost of high-precision micro-nano processing such as electron beam lithography, the market requirements of various grades can be met, and the anti-counterfeiting difficulty grade can be changed according to different image design and processing methods.

A camera module is provided. The camera module includes a lens assembly including at least one lens, an optical refractive member disposed at a path of light passing through at least a part of the at least one lens, an image sensor for converting the light received through the at least one lens and the optical refractive member into an electrical signal, a housing for accommodating the optical refractive member and the image sensor, a first driving unit for moving the image sensor within an internal space formed by the housing along a first direction in which a distance between the optical refractive member and the image sensor is changed, and a second driving unit for moving the image sensor along at least one of a second direction or a third direction which is different from the second direction with respect to the housing. The first driving unit may include a first carrier for transporting at least a part of the second driving unit which accommodates the image sensor along the first direction, and at least one first sphere interposed between the first carrier and the housing and disposed to move the first carrier along the first direction with respect to the housing.

An assembling space is formed in a body of the projection lamp, a driving assembly and a fixing base are arranged in the assembling space of the body, the driving assembly is connected with a lens assembly, a plurality of optical refraction structures which are adjacently arranged are formed on the inner wall of the lens assembly, and the fixing base can stretch into the lens assembly. A light-emitting element is arranged in the lens assembly, the light-emitting element can emit light rays and irradiate the light rays into the lens assembly, the light rays can be refracted through the optical refraction structures distributed on the inner wall of the lens assembly, and the lens assembly can be driven to rotate around the light-emitting element. Therefore, the relative angle between each optical refraction structure and the light-emitting element is continuously changed, and the refraction angle of the light is also changed, so that a plurality of strip-shaped light beams can be projected, and the light and shadow effect of infinite circulation movement can be achieved.

The utility model relates to the technical field of optical experiments, and discloses an optical experiment device which comprises an optical experiment frame, a shading protection cover plate is arranged on the outer side of the optical experiment frame, a positioning supporting rod and a distance adjusting ruler are arranged on the optical experiment frame, and a plurality of clamping adjusting seats are arranged on the positioning supporting rod. According to the utility model, the plurality of clamping adjusting seats are assembled at the positioning support rod, and the center of the device corresponds to each other, so that the experiment effect is stable, the light of the ray light source can be subjected to a visual light source angle refraction experiment by matching the optical refraction experiment board with the light refraction body, and the experiment is relatively convenient; a plurality of optical experiment convex lenses can be conveniently installed, different optical experiment convex lenses can be rapidly replaced by adjusting the adjusting control disc body, the experiment convenience is high, the device achieves the angle refraction experiment capacity, different lenses can be conveniently replaced to display spectrums, and the experiment selection range is wide.

1. Name of this design product: Photoelectric Pipeline Liquid Level Sensor (SEN‑GD06D). 2. Purpose of this product design: Used to detect whether there is liquid in the pipeline using the principle of optical refraction. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: Stereoscopic drawing 1.

The invention provides a refractive index sensor based on an MIM chiral meniscus structure array. A chiral metal nanostructure array of the refractive index sensor comprises a plurality of MIM meniscus units which are periodically arranged; each MIM meniscus unit comprises two metal meniscus structures with the same thickness and a medium meniscus structure arranged between the two metal meniscus structures; each single-layer meniscus structure has an asymmetric shape and has a chiral optical response. According to the invention, three metal / medium meniscus structures with the same size are longitudinally stacked to form an MIM chiral structure. According to the invention, a metal-insulator-metal configuration and a chiral structure are combined, and plasmon coupling in a z direction is introduced, so that a double-peak-shaped CD signal is realized. The optical refractive index sensor has the advantages of high sensitivity, high quality factor and the like, and the problems that a traditional optical refractive index sensor is generally large in size, limited in application range and the like are solved.

The present invention relates to a windshield (10) for a display system, comprising: an outer pane (1) having an exterior surface (I) and an interior surface (II); and an inner pane (2) having an exterior surface (III) and an interior surface (IV), wherein the interior surface (II) of the outer pane (1) and the exterior surface (III) of the inner pane (2) are connected to one another by a thermoplastic intermediate layer (3) which has at least one display region (A, B) and which is provided with a reflective coating (20) at least in the display region (A, B), the reflective coating being disposed on the interior surface (IV) of the inner pane (2), and wherein the reflective coating (20) comprises, in the indicated order proceeding from the inner pane (2): - a first dielectric high-optical-refraction layer (21) having a refractive index of greater than or equal to 1.9, - a first dielectric low-optical-refraction layer (22) having a refractive index of less than or equal to 1.6 and an optical thickness of 5 nm to 40 nm, - a second dielectric high-optical-refraction layer (23) having a refractive index of greater than or equal to 2.2, an optical thickness of 45 nm to 100 nm and a geometric thickness of at most 35 nm, - a reflection-increasing layer (24) which is based on a metal or semiconductor and which can optionally be partially or completely oxidized, - a second low-optical-refraction layer (25) having a refractive index of less than or equal to 1.6.

A vertical-cavity surface-emitting laser (VCSEL) emitter device includes a highly-doped cap layer; and a stacked structure comprising a top surface and an edge region. The highly-doped cap layer is arranged on the top surface. The stacked structure includes a bottom distributed Bragg reflector (DBR) mirror; a top DBR mirror; an active area arranged between the top DBR mirror and the bottom DBR mirror and configured to generate laser light; and at least one oxide layer, wherein an oxide aperture is formed through the at least one oxide layer for current confinement and optical index guiding. An isolation trench is arranged at the edge region, wherein the isolation trench extends through the highly-doped cap layer and into the stacked structure, including partially into the bottom DBR mirror, and wherein the isolation trench is configured to block current from spreading into the edge region via the highly-doped cap layer.

Disclosed are a method and a device for the marker-free detection of an analyte in a fluid. At least one dielectric microsensor is used, which comprises a microresonator and an adsorbate layer for binding an analyte, which adsorbate layer is applied to the microresonator. The microresonator consists of a particle which comprises a dielectric material and a fluorescent marker. Furthermore, the microresonator has an optical refractive index that is higher than the optical refractive index of a fluid to be analyzed. The microresonator is suitable for allowing more than one resonance mode to form in the interior thereof when the fluorescent marker is excited. The optical thickness of the adsorbate layer of the microsensor is determined from spectral positions of at least two detected optical resonance modes of the microsensor and used to determine the extent to which an analyte has bonded to the at least one microsensor.

A display device is provided, including: a substrate having a light emitting region; a light emitting element layer including a light emitting element in the light emitting region; and a sensing layer on the light emitting element layer and including a sensing electrode, a first refractive layer, and a second refractive layer, the sensing electrode having a first opening superposed with the light emitting region, the first refractive layer directly on the sensing electrode and having a second opening superposed with the light emitting region, the second refractive layer on the light emitting element layer and the first refractive layer, a first optical refractive index of the first refractive layer being smaller than a second optical refractive index of the second refractive layer.

The invention relates to an optical waveguide sensor for detecting heavy metal ions in an aqueous solution and a manufacturing method thereof. An optical waveguide sensor includes a substrate surface having a uniform thin layer of ligands coupled thereto with a tin catalyst to form a functionalized substrate surface, where the optical waveguide sensor is configured to interact with an optical wave at an input of the optical waveguide sensor and an aqueous solution in contact with the functionalized substrate surface, the method further includes determining the concentration of the heavy metal ions in the aqueous solution, whereby the heavy metal ions in the aqueous solution form a coordination complex upon contact with a plurality of binding sites available on the functionalized substrate surface, thereby altering the material optical refractive index of the functionalized substrate surface, the alteration corresponding to the concentration of the heavy metal ions. Treating the surface of the substrate to enable the treated surface to couple to the ligand; coupling the treated substrate surface with the ligand to form a uniform thin layer of ligand on the substrate surface, thereby forming a functionalized substrate surface; and cleaning the functionalized substrate surface with dilute nitric acid wherein the coupling of the treated substrate surface with a ligand is carried out with a tin catalyst, the selection of the ligand varying depending on the type of substrate surface and the type of heavy metal ion to be detected.

A rare-earth doped optical fiber (active optical fiber) is presented that exhibits a thermal coefficient of optical refraction (dn / dT) of the core region that is reduced relative to the thermal coefficient of optical refraction (dn / dT) of the surrounding cladding. The reduction of the dn / dT of the core region has been found to reduce the impact of transverse mode instability (TMI) in the presence of high levels of pump power (or other conditions that can also increase the thermal load present in the core region). Specifically, it has been found that reducing the dn / dT of the core region relative to the dn / dT of the cladding by at least 10% is sufficient to extend the temperature range in which the active optical fiber is maintained in single mode operation. The reduction of the dn / dT can be provided by modifying the dopants introduced into the core region, where, for example, it is known to introduce boron into ytterbium doped optical fibers to reduce the dn / dT of the core region.

The invention provides bio-based optical resin containing an isosorbide structure as well as a preparation method and application of the bio-based optical resin. The bio-based optical resin contains a repeating unit with a structure as shown in a formula (I). The bio-based optical resin has good comprehensive performance and high optical refractive index and thermal stability, the refractive index of the obtained bio-based optical resin containing the isosorbide structure reaches 1.565-1.636, and the bio-based optical resin can meet the performance requirement of the optical resin in optical components. The preparation method disclosed by the invention is simple, mild in reaction condition, small in catalyst dosage, low in equipment requirement and convenient for large-scale production, and is an efficient and environment-friendly bio-based optical resin preparation process.

The invention belongs to the technical field of laser treatment of corneal tissues, and particularly relates to a method for adjusting optical and mechanical properties of corneal tissues through photosensitizer-assisted femtosecond laser linkage. The method comprises the following steps: introducing an exogenous photosensitizer into cornea tissues, and pretreating the cornea tissues; a femtosecond laser direct writing system is adopted to focus a laser beam in the cornea tissue; the femtosecond laser is subjected to three-dimensional fine customized crosslinking in the cornea tissue by adjusting various parameters of a laser beam of a light path of the femtosecond laser direct writing system; the femtosecond pulse laser generates a two-photon effect at a light focus, low-density plasma is induced under the assistance of a photosensitizer, collagen tissue in cornea tissue generates oxygen free radicals, then the oxygen free radicals react with surrounding protein to form crosslinking, and synergistic change of the refractive index and the mechanical property of the cornea tissue is initiated. The method can effectively inhibit generation of bubbles in the laser treatment process, and enables the optical refractive index of the treated cornea tissue to be increased; the optical light transmittance is kept in a normal interval; and the mechanical strength is improved in linkage.

This invention provides a display panel and a display device. The display panel includes a first optical refractive layer and a second optical refractive layer. The first optical refractive layer includes multiple openings, and the second optical refractive layer fills the multiple openings. The refractive index of the second optical refractive layer is greater than that of the first optical refractive layer. Nanoparticles are also disposed within the second optical refractive layer. When light passes through, the first and second optical refractive layers effectively increase the light transmittance. Simultaneously, the nanoparticles further act on the light, thereby effectively improving the light extraction rate of the display panel and enhancing its display effect.

Disclosed herein are apparatus and methods for acoustic imaging. The disclosed embodiments include a plurality of ultrasonic transducers configured to generate ultrasound signals. The disclosed embodiments include an optical sensor array comprising a first optical sensor. The first optical sensor may include an acoustic stack. The acoustic stack may include a backing layer that supports an optical layer. The optical layer may include an optical waveguide and a tuning device configured to tune the optical length of the optical waveguide. The optical waveguide may include a core region and one or more cladding regions. The one or more cladding regions may have optical refractive index less than the core region.

Disclosed herein are apparatus and methods for acoustic imaging. The disclosed embodiments include a plurality of ultrasonic transducers configured to generate ultrasound signals. The disclosed embodiments include an optical sensor array comprising a first optical sensor. The first optical sensor may include an acoustic stack. The acoustic stack may include a backing layer that supports an optical layer. The optical layer may include an optical waveguide and a tuning device configured to tune the optical length of the optical waveguide. The optical waveguide may include a core region and one or more cladding regions. The one or more cladding regions may have optical refractive index less than the core region.

The present invention discloses a method for image distortion correction and a computer-readable storage medium. The method comprises: obtaining an original image and a distorted image; decomposing the distorted image to obtain multiple sub-images each containing only a single distorted line segment; obtaining the distorted line segment in each sub-image and the feature points of each distorted line segment; generating a correction curve based on the feature points of the distorted line segment and the original line segment corresponding to the distorted line segment; generating a corrected image based on the correction curve corresponding to each original line segment; and projecting the corrected image. The present invention can offset the distortion caused by optical refraction and present a corrected image.

A reflector is applied to an illumination device and includes a reflection layer and a homogenization layer. The reflection layer is used to reflect an illumination beam passing into the reflector. The homogenization layer is disposed on the reflection layer. The homogenization layer includes packaging material and a plurality of homogenization particles. The plurality of homogenization particles is distributed inside the packaging material, and can be made of at least one of transparent material and opaque material. An illumination range of the illumination beam is enlarged by optical refraction and optical reflection provided by the plurality of homogenization particles of the homogenization layer.

The invention relates to a lighting device (4) having a lighting beam path, comprising: a cylindrical lens (1); first, second, third and fourth optical elements (5.1 to 6.4) for shaping the illumination radiation in each case in a direction orthogonal to the optical axis (oA); and at least a first optical lens (7) and a second optical lens (8), each having a fixed focal length. The cylindrical lens (1) has an optical refractive effect (effective direction aR) in exactly one direction, whereby the illumination radiation is shaped in one direction perpendicular to the effective direction. Each optical element either has an optical refractive effect or influences the wavefront of the illumination radiation in exactly one direction (effective direction aR), whereby the illumination radiation is shaped in one direction perpendicular to the effective direction. The four optical elements are arranged behind the cylindrical lens, wherein the effective direction of the cylindrical lens and the effective direction of the successive optical elements are oriented orthogonally to each other. The invention also relates to a corresponding method.

Disclosed is an optical microscope (200) comprising: a light source (201) that emits illumination light (202); an optical device comprising a microscope objective (205); a resonator (212) disposed between the optical device and a sample and comprising, in order in a direction of an optical axis of the microscope objective, a first layer having a first optical refractive index, a spacer layer having a second optical refractive index, and a waveguide layer having a third optical refractive index, a resonator having a second optical refractive index smaller than the first and third optical refractive indexes, the resonator having a retaining surface opposite the optical device, the retaining surface being intended to receive a sample; an optical detector (206); the optical device is configured to collect light emitted from the resonator; the emergent light includes light (204) scattered by the sample and a reflective portion (215) of the illumination light that is not scattered.

The invention relates to the technical field of gypsum dehydration, in particular to a material level detector of a gypsum dehydrator. Comprising a shell, a throwing cylinder is connected in the shell through a driving unit, a cover plate is detachably and fixedly connected to the upper end of the shell, an electric turntable is mounted at the lower end of the cover plate, and a material level detection assembly is mounted at the lower end of the electric turntable. The upper range finder penetrates through a high-turbidity liquid layer along with the gravity of the measuring rod to directly reach the solid-phase surface of gypsum, so that optical refraction interference is eliminated; the lower range finder continuously monitors the liquid phase height, and the interface recognition reliability is guaranteed through double-data-source cross validation. The stop lever and the rotating plate are mechanically interlocked to control the release time of the measuring rod, it is ensured that the measuring rod penetrates through a liquid layer only in the solid phase measuring stage, the proximity sensor is linked with the band-type brake servo motor to achieve automatic recovery of the measuring rod, and gypsum adhesion is avoided.

The invention relates to the technical field of optical communication, in particular to a vertical and horizontal hybrid packaged double-in-one TO optical assembly and an optical module, which comprises a TO seat, a TO cap, a plurality of optical chips and a light refraction unit, the plurality of optical chips and the light refraction unit are fixedly arranged on the TO seat; the TO seat is provided with at least one mounting column, the mounting column is fixedly connected with the TO seat, each mounting column is fixedly provided with an optical chip, the surface of the TO seat is provided with an optical chip, and the light refraction unit is used for transmitting an optical signal into each optical chip; one of a spherical lens and a flat window mirror is arranged in the center of the top of the TO cap, the spherical lens is used for transmitting converged light to the light refraction unit, and the flat window mirror is used for transmitting parallel light to the light refraction unit.

This application discloses an underwater vehicle positioning method, apparatus, system, and underwater vehicle. The method includes: acquiring a target event stream collected by an event camera; determining an event point cloud whose event trigger frequencies match the target frequency based on the target event stream, and determining sub-pixel-level center coordinates based on the pixel coordinates corresponding to the event point cloud, wherein the target frequency is the flashing frequency of the guide light source set on the docking target corresponding to the underwater vehicle; mapping the sub-pixel-level center coordinates to a three-dimensional line-of-sight vector by performing refraction distortion correction processing on the sub-pixel-level center coordinates; and determining the target pose of the underwater vehicle based on the three-dimensional line-of-sight vector and the preset spatial coordinates corresponding to the guide light source on the docking target. This application solves the technical problem of low visual positioning accuracy caused by motion blur, overexposure, and optical refraction distortion in traditional frame cameras under underwater dynamic interference environments in related technologies.