70 results about "Optical refraction" patented technology

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.

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 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.

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.

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.

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.

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.

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.

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.

LIDAR device (100) for detecting an object having • a transmitting unit (101) with at least one laser (102, 102-A to 102-G) for emitting at least one laser beam (103-1); and • a receiving unit (104) for receiving laser light (201) reflected from the object; wherein the transmitting unit (101) continues • comprising at least one beam duplication unit (105) for duplicating the at least one laser beam (103-1) into at least two duplication beams (103-2), wherein • the beam multiplication unit (105) is configured to transmit; and • the beam multiplication unit is designed as a refractive optical element (600), characterized in that • at least one side of the optical refractive element (600) is designed as a planar surface (604); and that a side (605) of the refractive optical element opposite the planar surface (604) has at least two adjacent areas (601, 602, 603), wherein the at least two areas (601, 602, 603) have different slopes.

The invention discloses a controllable visual stimulation system for a magnetic resonance environment. The system comprises a controllable stimulation source module, a magnetic compatible display module, a magnetic resonance imaging module and a data processing module, the controllable stimulation source module generates dynamic visual stimulation patterns through the computer control system and the projector, the dynamic visual stimulation patterns are projected to the display screen made of non-magnetic materials, and then various visual stimulation modes including plane images, stereo images and unshielded binocular independent visual stimulation are achieved through the cylindrical lens grating by means of optical refraction and parallax principles. The magnetic resonance imaging module is used for synchronously collecting brain imaging data in the experiment process, and the visual stimulation signals and the imaging data are stored and analyzed in real time through the data processing module. According to the invention, the binocular vision principle of the cylindrical lens grating is utilized, accurate vision input in a complex vision stimulation scene is realized, meanwhile, the problem of magnetic field interference of traditional display equipment in a magnetic resonance environment is avoided, and the imaging quality and the experiment safety are ensured.

A non-linear optical crystal includes a nanostructured optical surface including distributed pillars and voids to provide anti-reflection and scatter control of light incident on an optical surface. The crystal with the anti-reflective structured optical surface may be a monolithic structure and thus need not include a coating of an anti-reflective (AR) material. The pillars and gaps may be randomly distributed on the optical surface to form a gradient optical index.

An apparatus for monitoring a plasma process may include an electro-optical (EO) sensor module and an optical guide, the EO sensor module may be arranged in a plasma chamber configured to perform a semiconductor process for processing a substrate using plasma, the EO sensor module may include a non-conductive material having an optical refractive index changed by an electric field formed in the plasma chamber, the optical guide may form at least one internal path of a light, which may have an optical characteristic changed by the changed optical refractive index, between the EO sensor module and the plasma chamber.

The application discloses a one-dimensional photonic crystal refractive index sensor and a refractive index detection method. The one-dimensional photonic crystal refractive index sensor comprises a vertical coupling incident grating, a plurality of micro resonant cavities and a vertical coupling output grating. The micro resonant cavities are realized based on a strip waveguide, an air slit structure and a silicon-based triangular synapse. The vertical coupling incident grating, the plurality of micro resonant cavities and the vertical coupling output grating jointly constitute a one-dimensional photonic crystal. After an input optical signal passes through a beam splitter, the input optical signal passes through a specially designed one-dimensional photonic crystal, interacts with a liquid substance to be detected in the one-dimensional photonic crystal, and is then output. The application realizes an optical refractive index sensor with a one-dimensional photonic crystal, a slit waveguide and a synapse structure, and has the advantages of small size, low preparation cost and large-scale integration. The optical refractive index sensor is a basic element of an optical sensing chip, a bio-lab-on-chip and the like, and has a wide market prospect.

The invention discloses low-radiation anti-reflection coated glass for an automobile skylight and a preparation method of the low-radiation anti-reflection coated glass, and belongs to the technical field of vacuum magnetron sputtering coated glass. The coated glass comprises a glass substrate layer and five coating layers sequentially deposited on the surface of the glass substrate layer through a vacuum magnetron sputtering method, wherein the five coating layers sequentially comprise a first silicon nitride film layer, a second silicon oxide film layer, a third indium tin oxide film layer, a fourth silicon oxide film layer and a fifth zirconium oxide film layer from inside to outside; wherein the outer surface of the coating layer is in a 25 [mu] m < 2 > measurement area, the surface average roughness Ra is greater than 1.5 nm, and the root-mean-square roughness Rq is greater than 1.5 nm. The high-hardness and high-toughness zirconium oxide film layer is combined with the compact and stable silicon oxide film layer, and the optical refractive index of each film layer material is optimized, so that the reflection and transmission characteristics of visible light are effectively regulated and controlled, the wear resistance and chemical stability of the film layers are improved, and meanwhile, low radiation, low reflection and good temperable performance are considered.

The invention provides a method and a system for compositely manufacturing a micro-fluidic chip based on embedded direct writing and volume printing. The method comprises the following steps: preparing a photosensitive resin matrix with shear thinning characteristic and sacrificial ink; carrying out embedded direct-writing forming to construct a three-dimensional flow channel framework; calculating and modulating a light field, and generating the light field by adopting different algorithms according to the optical refractive index difference between the ink and the resin; performing photocuring on the chromatography volume to form a chip entity; and removing the sacrificial layer to obtain the micro-fluidic chip. The system integrates direct writing and volume printing modules and is coordinated by a control unit. According to the method, flow channel blockage is avoided through sacrificial ink, the inner wall smoothness is guaranteed through volume printing, multiple material systems are compatible through light field calculation, and the manufacturing quality efficiency is improved; the system realizes composite manufacturing and provides support for large-scale production and application of micro-fluidic chips.

An optical refractive index sensor based on a pea-shaped metasurface and a method for fabricating the same relate to the field of optical sensing technology, specifically to an optical refractive index sensor based on a pea-shaped metasurface and a method for fabricating the same. The sensor comprises a dielectric substrate and a metastructure, wherein the dielectric substrate comprises a plurality of square substrates, and the metastructure comprises a plurality of superstructure units. The superstructure units are arranged corresponding to the square substrates and constitute microstructure units. The microstructure units form a matrix distribution and are periodically arranged in the X and Y directions. By employing metasurface materials with different refractive indices to break symmetry, the sensor can generate two sharp Fano resonances within the sensor's operating wavelength range, achieving a high quality factor.

A display device includes a substrate having a light emission area, a light emitting element layer including a light emitting element on the light emission area, and an sensing layer on the light emitting element layer and including a sensing electrode having a first opening overlapping the light emission area, a first refraction layer directly on the sensing electrode and having a second opening overlapping the light emission area, and a second refraction layer on the light emitting element layer and the first refraction layer, a first optical refractive index of the first refraction layer being less than a second optical refraction index of the second refraction layer.

The invention discloses a urea solution concentration automatic adjustment and control system, and the system comprises a multi-mode concentration detection module which detects the concentration of a urea solution in real time, and comprises an ultrasonic phase difference detection sub-module, an optical refraction detection sub-module, and a multi-mode information fusion and processing unit which is used for carrying out the fusion processing of the detection results of the ultrasonic phase difference detection sub-module and the optical refraction detection sub-module; the dynamic proportioning execution module is used for accurately preparing a urea solution according to the control instruction; the intelligent control unit is in signal connection with the multi-mode concentration detection module and the dynamic proportioning execution module; and a man-machine interaction and remote monitoring module. Through the multi-mode concentration detection module, two detection technologies of ultrasonic phase difference and optical refractive index are fused, and confidence evaluation and an adaptive weighted fusion algorithm are combined, so that the measurement deviation of a single sensor under a complex working condition is effectively overcome, and full-range, fuzzy-free and high-reliability concentration detection is realized.

An imaging lens assembly module includes a lens barrel, a catadioptric lens assembly, an imaging lens assembly, a first fixing element and a second fixing element. The lens barrel has a first relying surface and a second relying surface, which face towards an object side of the imaging lens assembly module. The catadioptric lens assembly relies on the first relying surface. The imaging lens assembly is disposed on an image side of the catadioptric lens assembly, and relies on the second relying surface. The first fixing element is for fixing the catadioptric lens assembly to the lens barrel. The second fixing element is for fixing the imaging lens assembly to the lens barrel. The catadioptric lens assembly is for processing at least twice internal reflections of an image light in the imaging lens assembly module, and for providing optical refractive power.

The invention relates to the field of eye protection table lamps, in particular to a 3D stereoscopic optical refraction eye protection table lamp structure which comprises a base, a bendable support is fixedly connected to the top end of the base, a polygonal lampshade is fixedly connected to the top end of the support, the front portion of the polygonal lampshade is wide, the rear portion of the polygonal lampshade is narrow, and a lamp body is arranged in the lampshade. The number of the trapezoid reflectors is matched with that of the edges of the polygonal lampshade, the trapezoid reflectors are parallel to the corresponding edges of the polygonal lampshade, and the ends of the trapezoid reflectors are rotationally connected to the inner side wall of the polygonal lampshade. A distance sensor and a plurality of trapezoidal reflectors are arranged, the distance parameters between the polygonal lampshade and an irradiation area are measured through the laser distance sensor, the overturning driving assembly drives the trapezoidal reflectors to overturn according to the distance parameters measured by the laser distance sensor, and the refraction angles of the trapezoidal reflectors are adjusted; light beams are prevented from being excessively concentrated or dispersed, so that eye fatigue can be reduced.

The invention provides a display panel and a display device.The display panel comprises an array substrate, an opposite substrate opposite to the array substrate and a liquid crystal layer located between the array substrate and the opposite substrate; at least one shielding structure is arranged in the array substrate and the opposite substrate, each shielding structure comprises a stacked film layer, and each stacked film layer comprises a first metal layer, a first dielectric layer, a second metal layer and a second dielectric layer which are arranged in a stacked mode. The optical refractive index of the first dielectric layer and the second dielectric layer is a first refractive index, the optical refractive index of the first metal layer and the second metal layer is a second refractive index greater than the first refractive index, and the thickness difference between the first metal layer and the second metal layer is greater than a preset value.

The invention provides a micro-defocus eyeball movement optical refraction adjusting device, and relates to the technical field of myopia correction. The micro-defocusing eyeball movement optical refraction adjusting device comprises a shell, side baffles are fixedly connected to the inner walls of the two sides of the shell, a spectroscope assembly is jointly and fixedly connected between the two side baffles, an adjustable concave mirror is arranged on the back face of the spectroscope assembly, a defocusing piece assembly is arranged above the spectroscope assembly, and the defocusing piece assembly is fixedly connected with the shell. The adjustable concave mirror and the out-of-focus sheet assembly are respectively provided with a two-dimensional fine tuning assembly. Through a dynamic optical compensation technology, the problem of visual fatigue caused by long-time close-range eye use can be effectively relieved. The cooperative adjustment mechanism of the defocus piece and the concave mirror can ensure that the eyeballs of the user are always in the optimal optical action range in the reading or writing process, so that the continuous tension state of ciliary muscles is relieved, and more comfortable eye use experience is brought to the user.

Optical structure with: Light sensors (630) arranged on a front side of a semiconductor substrate (510); an optical refractive layer (734) arranged on a back side of the semiconductor substrate (510), having a first refractive index and having planar distal surface parts and non-planar distal surface parts with random protrusions; a lattice structure (740) arranged on and in contact with the planar distal surface parts and having openings arranged over the non-planar distal surface parts; an optically transparent layer (770) extending vertically through the openings in the lattice structure (740), contacting the non-planar distal surface parts and having a second refractive index different from the first, thereby providing a refractive interface with the non-planar distal surface parts that refracts incident light in random directions; and an arrangement of masking structures (750) which are arranged outside of areas of the non-planar distal surface parts of the optical refractive layer (734) and have sidewalls which are arranged over and contact a respective part of a top surface of the grating structure (740), wherein the optically transparent layer (770) is arranged over the arrangement of masking structures (750).