178 results about "Polarizing filter" patented technology

The invention belongs to the technical field of welding quality detection, and particularly relates to a visual image-based welding seam defect detection method, which comprises the steps of image acquisition, image preprocessing, data analysis, data output, defect classification and decision making, system closed-loop optimization and the like. According to the method, by synchronously collecting two-dimensional images, three-dimensional shapes and heat distribution data of metal welding seams and adopting a polarization filter and annular LED light source combination scheme, multi-dimensional conjoint analysis of physical defects and thermodynamic characteristics is achieved, basic characteristic data are extracted through primary processing, quantifiable defect coefficient indexes are generated through secondary processing, and the detection accuracy is improved. And finally, generating a comprehensive defect index through a multi-modal fusion algorithm, constructing a well-arranged intelligent analysis decision chain, and establishing a self-evolution mechanism of data acquisition-analysis decision-model iteration through real-time interaction of a detection result and an algorithm model. The system can continuously optimize the detection threshold value and the characteristic weight parameter according to the actual working condition of the production line, and the continuous improvement of the detection sensitivity is kept.

The invention discloses a package defect elimination method based on visual inspection, and relates to the technical field of image processing and computer vision, and the method comprises the following steps: setting a polarized light source with a fixed angle on a package production line, and uniformly illuminating a target package area to enable the incident light polarization direction and the package surface reflection direction to form a deviation angle; an industrial camera provided with a polarization filter is used for carrying out image collection on a packaging target area, and the polarization direction of the filter is perpendicular to the polarization direction of a light source so as to restrain reflection interference to the maximum extent. Reflection interference is eliminated through polarized light, and the image quality is improved; by combining a neural network and feature fusion scoring, the defect recognition accuracy and adaptability are improved; a closed-loop elimination control and data tracing mechanism is introduced, the elimination precision is guaranteed, quality responsibility investigation is supported, and the intelligence and reliability of the packaging defect detection and elimination system are integrally improved.

This invention provides a system and method inspecting transparent or translucent features on a substrate of an object. A vision system camera, having an image sensor that provides image data to a vision system processor, receives light from a field of view that includes the object through a light-polarizing filter assembly. An illumination source projects polarized light onto the substrate within the field of view. A vision system process locates and registers the substrate, and locates thereon, based upon registration, the transparent or translucent features. A vision system process then performs inspection on the features using predetermined thresholds. The substrate can be a shipping box on a conveyor, having flaps sealed at a seam by transparent tape. Alternatively, a plurality of illuminators or cameras can project and receive polarized light oriented in a plurality of polarization angles, which generates a plurality of images that are combined into a result image.

The invention discloses a metal processing detection system and method based on computer vision, and relates to the technical field of defect detection.Rotatable polarization filters are installed in front of a lens of a vision sensor, the polarization filters are arranged at four angles respectively, and four sets of polarization images are collected; calculating the polarization degree of each pixel point on the surface during metal processing by using the gray values of the four groups of polarization images, setting a polarization region interval, and dividing a metal surface reflection region into a specular reflection region and a diffuse reflection region; acquiring images of different wavebands by using a multispectral vision sensor, and constructing a multispectral image set; for the same wave band, the images of different exposure times are synthesized to obtain an HDR high dynamic range image; setting a weight for the HDR image of each wave band, and combining the weighting of the HDR image and the suppression of the polarization degree to carry out multispectral image fusion so as to obtain a final image; and a gray threshold value and an area threshold value are respectively calculated through the average value and the standard deviation, and the metal processing defects are judged by using the two threshold values.

The invention provides an imaging method and system based on a polarization imaging lens and visual collaborative optimization, and a medium, and the method comprises the steps: integrating a four-way polarization filter array on the surface of an imaging sensor, and synchronously collecting a four-channel polarized light intensity image through single-frame exposure based on the imaging sensor; obtaining a three-channel RGB image, and inputting the four-channel polarized light intensity image and the three-channel RGB image into a polarization-RGB fusion neural network; polarization features and RGB features are extracted, heterogeneous information coupling optimization is carried out, and fusion features are obtained; constructing a polarization-color joint decoding network, carrying out polarization and RGB information collaborative decoding on the fusion features, training a polarization decoding process and a material classification task together based on an end-to-end joint optimization strategy, and outputting a material classification result; high-efficiency acquisition of original polarization information on a hardware level is guaranteed through the polarization filtering array; and an end-to-end joint training strategy is adopted to realize optimal decoupling and fusion of perception information.

The utility model relates to an LCOS (Liquid Crystal On Silicon) projection device, which comprises a light source module capable of emitting red, green and blue light beams, a polarization filter and an imaging lens which are sequentially arranged along a projection light path, an LCOS chip capable of modulating the polarization state of incident light is arranged on a projection light path between the polarization filter and the imaging lens, and an imaging lens group capable of imaging the incident light onto the LCOS chip is arranged on a projection light path between the light source module and the polarization filter. And a polarization layer capable of transmitting P polarized light and reflecting S polarized light is arranged on the polarization filter. Compared with a polarizing prism applied to a traditional LCOS projection light path, the LCOS projection light path has the advantages that through the arrangement of the polarizing filter and the polarizing layer which is arranged on the polarizing filter and can transmit P polarized light and reflect S polarized light, the LCOS projection light path has higher polarization efficiency, stray light is reduced, and optical efficiency is improved.

The invention relates to a millimeter wave broadband circularly polarized filtering antenna, which belongs to the technical field of wireless energy transmission and comprises an upper dielectric substrate, a lower dielectric substrate, an upper metal floor, a middle metal floor, a lower metal floor, a top patch array, cavity columns and short circuit via holes. The bottom metal floor is arranged on the lower surface of the lower dielectric substrate; the middle-layer metal floor is arranged on the upper surface of the lower-layer dielectric substrate; the upper-layer metal floor is arranged on the lower surface of the upper-layer dielectric substrate; the top-layer patch array is arranged on the upper surface of the upper-layer dielectric substrate; the cavity column penetrates through the middle-layer metal floor, the lower-layer dielectric substrate and the bottom-layer metal floor to define an I-shaped SIW cavity; a feed hole is formed in the I-shaped SIW cavity; the short-circuit via hole penetrates through the top-layer patch array, the upper-layer dielectric substrate and the upper-layer metal floor; and two same rectangular coupling grooves are respectively etched in the middle parts of the upper-layer metal floor and the middle-layer metal floor.

The invention discloses a dual-polarization filtering integrated antenna and a manufacturing method, and relates to the technical field of communication, the dual-polarization filtering integrated antenna comprises an antenna assembly and a filtering assembly, the antenna assembly comprises a substrate, a grounding plate and two groups of radiation units, the grounding plate is arranged at the first end of the substrate, and the filtering assembly is arranged at the second end of the substrate; each radiation unit comprises an electric dipole, a magnetic dipole and a feed part, the magnetic dipole comprises two single walls, each single wall comprises a plurality of metal columns, the feed part is arranged at the second end of the substrate, the electric dipole is arranged in the horizontal direction and located between the first end and the second end, and the metal columns are arranged at intervals and form an electromagnetic shielding cavity; the filtering assembly is arranged between the electric dipole and the first end and is positioned in the electromagnetic shielding cavity; the filtering assembly comprises a filter, a vertical transmission line and an improved structure; the filter comprises a plurality of capacitors and inductors; according to the technical scheme provided by the invention, the limitation of contradiction between the structural integration level and the electromagnetic performance in the conventional filtering antenna design can be broken through.

A substrate processing apparatus includes a chamber, a substrate holder, an illuminator, a polarizing filter, a filter driver, a camera, and a controller. The illuminator irradiates an imaging region including a monitoring target in the chamber with illumination light. The filter driver rotates the polarizing filter to a rotation position corresponding to the monitoring target in the imaging region to reduce the unnecessary reflected light corresponding to the monitoring target using the polarizing filter. The camera captures an image of the imaging region through the polarizing filter to generate captured image data. The controller controls the filter driver, and monitors the monitoring target based on the captured image data generated by the camera.

An optical member includes aperture regions, a lens device, and an imaging apparatus. A lens device includes: an imaging optical system; a first polarizing part that polarizes at least a part of rays transmitted through the imaging optical system; and a filter unit that is disposed at a pupil position of the imaging optical system or near the pupil position, and includes aperture regions transmitting the rays of the imaging optical system and including a first aperture region and a second aperture region, wavelength selective filters disposed in the first aperture region and the second aperture region and transmitting pieces of light of which at least a part of wavelength ranges are different from each other, and a second polarizing filter including polarizing filters disposed in the first aperture region and the second aperture region and having polarization directions different from each other.

The invention provides a multi-mode polarization snapshot imaging system and method, and relates to the technical field of multi-spectral polarization imaging, and the imaging system comprises a polarization module which is used for carrying out the polarization separation of an original light beam, so as to form a plurality of polarized light beams in preset polarization directions and a plurality of non-polarized intensity light beams; the light filtering module is used for carrying out spectrum filtering treatment on the intensity light beam and the polarized light beam to form a corresponding intensity filtering light beam and a corresponding polarized filtering light beam; the lens module is used for respectively focusing the intensity filtering light beam and the polarization filtering light beam; and the sensor module is used for respectively imaging the focused intensity filtering light beam and the polarized filtering light beam to generate a multi-modal polarized image, and the multi-modal polarized image comprises a plurality of intensity images and a plurality of polarized images corresponding to the original light beam. The method has the advantages of flexible parameter configuration, mature and feasible process, high integration level and relatively low cost.

The invention relates to the technical field of textile double-sided printing, in particular to a high-permeability and double-sided positioning printing method for all-cotton towel products, which comprises the following steps: pre-treating all-cotton towel gray cloth, including desizing, scouring and bleaching procedures; padding the treated gray cloth in slurry containing urea, sodium bicarbonate, anhydrous sodium sulphate and a penetrant, and then drying and sizing; printing on the front surface of the towel by adopting a digital printing machine, and spraying a penetrating agent with the surface tension of 25-35mN / m to a printing area through an independent jet printing channel, so as to promote the dye to fully permeate to the back surface of the fabric and form a clear pattern outline; according to the invention, an image acquisition system composed of an industrial camera, an annular LED coaxial light source and a polarization filter captures fabric back pattern contour features in real time, and generates a translation, rotation and zooming transformation matrix based on an image registration algorithm; in combination with closed-loop feedback control of the digital printing machine, the positioning precision is improved by more than 75% compared with a traditional method.

The invention discloses a compact circularly polarized filtering patch antenna which comprises an upper dielectric substrate and a lower dielectric substrate, a positive 45-degree main radiation patch, a pair of inclined rectangular parasitic patches which are arranged in a positive 45-degree direction and are parallel to the main radiation patch, and a pair of L-shaped parasitic patches which are arranged in a diagonal line in the positive 45-degree direction are printed on the upper dielectric substrate; a pair of vertical rectangular parasitic patches which are arranged diagonally at minus 45 degrees are printed on the lower surface of the upper-layer dielectric substrate; a floor is printed on the upper surface of the lower dielectric substrate, a middle rectangular groove is etched in the middle lower portion of the floor, four edge rectangular grooves are etched in the edge of the floor, a microstrip feeder line and a branch knot are printed on the lower dielectric substrate, and signals enter from a port and are coupled to the main radiation patch through the middle rectangular groove in the floor via the microstrip feeder line. And the main radiation patch is coupled and excited to the peripheral parasitic patches. By using the compact circularly polarized filtering patch antenna provided by the invention, the circularly polarized radiation performance with a compact structure and good band-pass filtering response is realized.

The invention discloses a disease prediction system and a disease prediction method based on urine image recognition, which are used for analyzing the physical properties of a urine sample by measuring the optical properties (such as reflectivity, polarization state and the like) of the urine sample by using a polarized light technology so as to realize the prediction and early detection of diseases. The light source module achieves time-sharing excitation through LED sets arranged in an annular array, mirror reflection components are separated in real time based on a polarization filter in a reflection suppression mode, a light source is directly driven to close a decision, a real-time closed loop from optical perception to light source control is formed, and dynamic liquid level reflection noise is eliminated from the source. The image acquisition module is combined with an ambient light differential compensation mechanism, and the angle of a polarization filter and a light source is cooperatively calibrated, so that the system stably works under a non-camera obscura condition; the control module dynamically adjusts the detection frequency based on the liquid level curvature change rate, the urine image color fidelity and the disease prediction accuracy are improved, meanwhile, user operation inclination tolerance is compatible, and the use reliability is improved.

Disclosed herein are systems and methods for non-invasive identification of biomarkers. The disclosed embodiments include a portable electronic device for biosignal acquisition. The disclosed embodiments include a housing having a chamber configured to receive a sample. The disclosed embodiments include a light source array disposed adjacent to the chamber. The disclosed embodiments include a plurality of sensors configured to detect a plurality of signals from the sample. The disclosed embodiments include a tunable filter array comprising a plurality of polarizing filters. The disclosed embodiments include a communications module configured to transmit the plurality of signals.

This invention relates to the field of water radiance measurement technology, and particularly to an enhanced water radiance sensor based on a polarizing filter. The sensor comprises a polarizing filter, a Kohler illumination system, a shaping fiber bundle, a spectrometer, and a host computer, arranged sequentially. The polarizing filter is positioned at a preset position at the front end of the optical path of the Kohler illumination system, which converts natural light from the water surface into a uniform and controllable light source. The incident end of the shaping fiber bundle is connected to the Kohler illumination system, and the exit end is connected to the spectrometer. The spectrometer is connected to the host computer. The water radiance passes sequentially through the polarizing filter, the Kohler illumination system, and the shaping fiber bundle before entering the spectrometer. The spectrometer converts the received optical signal into an electrical signal and transmits it to the host computer. The advantage of this invention is that by employing the Kohler illumination system, the field of view of the enhanced water radiance sensor is reduced to ±2°, solving the problem of poor glare suppression under large field of view in traditional sensors.

Disclosed is an imaging system with an image sensor and processor(s). The image sensor has a plurality of photo-sensitive cells arranged on a photo-sensitive surface of the image sensor; a colour filter array with colour filters of at least three different colours; and a polarisation mask with polarisation filters arranged on an optical path of at most a first predefined percent of the colour filters. The processor(s) is / are configured to: read out image data from the image sensor; and process the image data to generate at least one of: a full-resolution colour image, a full-resolution polarisation image, a high-dynamic range (HDR) image.

An information processing apparatus 100 includes one or more processors configured to: acquire a first image including a region of interest which is irradiated with first illumination light and imaged by an imaging element via a polarizing filter 31, and a second image including the region of interest which is irradiated with second illumination light and imaged by the imaging element without using the polarizing filter 31, and cause a display device 10 to switch between the first image and the second image in a state in which a position of the region of interest in the first image and a position of the region of interest in the second image substantially coincide with each other.

An image reading device (100) that reads an image of a read object (M) and detects a transparent sheet in contact with the read object M includes: light guides (2A and 2B) that irradiate the read object M, which is transported in a sub-scanning direction perpendicular to the main scanning direction, with light extending in the main scanning direction; a polarizing filter (13) that aligns the vibration direction of the light irradiated by the light guides (2A and 2B); a lens (8) that forms an image of light from the read object M and the transparent sheet using the light whose vibration direction has been aligned by the polarizing filters (13A and 13B); a UV-cut polarizing filter (12) that aligns the vibration direction of the light imaged by the lens (8); a sensor chip (11) that converts the light whose vibration direction has been aligned by the UV-cut polarizing filter (12) and imaged by the lens (8) into an electrical signal and outputs it; and a signal processing device (15) that detects the transparent sheet on the read object (M) based on the electrical signal output by the sensor chip (11).

A substrate processing apparatus includes a chamber, a substrate holder, an illuminator, a polarizing filter, a filter driver, a camera, and a controller. The illuminator irradiates an imaging region including a monitoring target in the chamber with illumination light. The filter driver rotates the polarizing filter to a rotation position corresponding to the monitoring target in the imaging region to reduce the unnecessary reflected light corresponding to the monitoring target using the polarizing filter. The camera captures an image of the imaging region through the polarizing filter to generate captured image data. The controller controls the filter driver, and monitors the monitoring target based on the captured image data generated by the camera.

The present invention provides a distance calculation device that can calculate distance information relating to the distance a workpiece travels. [Solution] The system comprises a light source 10 that emits light, a first optical system 20 that converts the light from the light source into elliptical polarization and emits it toward a workpiece W1 that is transparent and moving in a specific direction, a second optical system 30 that converts the light from the workpiece into linear polarization and emits it, and an optical sensor 40 that acquires optical information of the workpiece based on the light from the second optical system. The first optical system includes a first polarizing filter 22 that converts to linear polarization and a first waveplate 23 that converts the linear polarization from the first polarizing filter into elliptical polarization. The second optical system 30 includes a second waveplate 31 that converts the light from the workpiece and a second polarizing filter 32 that is placed between the second waveplate and the optical sensor 40 and converts the light from the second waveplate into linear polarization.

The invention relates to the technical field of optical imaging, in particular to a simulation system for imaging various scenes through atmospheric turbulence and a construction method, and the system comprises a silicon-based AMOLED micro display, a collimator, a polarization filter, a spatial light modulator, an imaging assembly and an image recording device. The image recording device reads and stores picture data or video data of a real scene, the picture data or the video data are loaded and displayed through the silicon-based AMOLED micro display, optical characteristics of the real scene are simulated, and the collimator collimates divergent light rays displayed and emitted by the silicon-based AMOLED micro display and converts the divergent light rays into parallel light rays; the polarization filter performs polarization processing on the parallel light, so that polarization light waves are matched with polarization characteristics of the spatial light modulator; the spatial light modulator modulates the phase of the polarized light wave and simulates a wavefront distortion effect caused by atmospheric turbulence; the imaging assembly images the phase-changed degraded image, which is stored by the image recording device.

The invention discloses an intelligent material scanning device and method based on multi-angle polarized illumination, and the device comprises a box body, and a camera assembly, a polarization filter, an illumination assembly and a rotating table which are sequentially distributed in the box body from top to bottom, and the polarization filter is rotatably connected to the front end of an objective lens of the camera assembly. The lighting assembly is provided with a plurality of light sources distributed on the hemispherical surface in a longitude and latitude mode. The camera assembly obtains image data on the rotating table through the polarization filter. The objective of the invention is to design an intelligent material scanning device which is low in cost, high in precision and ecologically open, and based on the combination of a physical polarization means and a photometric stereo method, the generated material is real and uniform under different environment illumination.

Provided are a photography aid tool and a skin photographing device used for photographing skin. A main body is used for photographing skin with a portable device having a photographing device and an illumination device, and is composed of a front plate, a rear plate and a plurality of side plates. The main body has an insertion opening, a partition plate with two openings, and a portable device holder for holding the portable device. A polarizing filter is provided at the opening of the partition plate. The portable device is held by the portable device holder, and the skin photographing window of the front plate is in contact with the skin. The skin surface is photographed using only the light from the illumination device of the portable device while light outside the main body is blocked.

This foreign matter detection system is provided with: an imaging device (9) that acquires an image within a target region (A); transmissive sections (7, 8), the outside of which can be seen from the inside of the target region (A); and polarizing filters (10a, 10b) on the light path from the transmission sections (7, 8) to the imaging device (9). A polarizing filter (10a) on the front side with respect to the imaging device (9) and a polarizing filter (10b) on the rear side with respect to the imaging device (9) are provided so that the polarization directions intersect each other. On the basis of the image acquired by the imaging device (9), the foreign matter (F) in the target region (A) is detected.

Provided are an optical member having a plurality of opening regions, a lens device, and an imaging device. The lens device (100) includes: an imaging optical system (100A); a first polarization unit (101) that polarizes at least a portion of light that passes through the imaging optical system (100A); and a filter unit (130) that is disposed closer to an image side than the first polarization unit (101) and is disposed at or near a pupil position of the imaging optical system, the filter unit (130) including: a plurality of opening regions that allow light of the imaging optical system (100A) to pass therethrough and including a first opening region and a second opening region; a plurality of wavelength selection filters that are disposed in the first opening region and the second opening region and allow at least a portion of light of different wavelength bands to pass therethrough, respectively; and a second polarization filter that is disposed in the first opening region and the second opening region and has a plurality of polarization filters having different polarization directions from each other.

The invention discloses a visual positioning method for laser marking software, and particularly relates to the technical field of laser marking, which comprises the following steps: irradiating an object to be marked through adjustable multi-light-source illumination, performing multi-angle imaging on the object to be marked through a camera based on a polarization filter, and marking the object to be marked. The method comprises the following steps: acquiring an image, evaluating positioning accuracy and image quality under different illumination conditions, processing images acquired under different illumination conditions by adopting a self-adaptive image processing algorithm, acquiring an artifact-free image by applying an image fusion technology, decomposing an image processing task by adopting a distributed system architecture, and distributing the decomposed image processing task to a plurality of computing nodes for parallel processing. According to the method, the complexity and the maintainability are evaluated, the upper limit of the speed of laser marking is determined according to the evaluation result in combination with the precision and the quality of visual positioning, the speed of laser marking is monitored and managed, the computing power requirement of the precise visual positioning requirement is effectively reduced through a distributed framework, and the effectiveness of speed supervision and control of laser marking is ensured.

A dynamic 3D light scattering particle size distribution measurement device includes a polarization splitter for generating an s laser beam with perpendicular polarization and a p laser beam with parallel polarization that travels parallel to and spaced apart from the s laser beam. A lens is used to focus the s laser beam and the p laser beam onto a common focus area inside a sample holder holding a sample whose particle size is to be measured. An s light intensity detector measures a time-resolved s light intensity from s backscattered light from the focus area. An s-polarisation filter allows perpendicularly polarized light to pass, resulting in s measuring light, and includes a light detector for time-resolved intensity measurements of the s measuring light. A p light intensity detector measures a time-resolved p light intensity detects p backscattered light from the focus area, and includes a p polarization filter that allows parallel polarized light to pass. A light detector provides for time-resolved intensity measurement of the p measuring light, and an evaluation unit automatically calculates the particle size distribution from the time-resolved p light intensity and the time-resolved s light intensity.

On-board camera device (1) comprising: a plurality of cameras (10L, 10R), each configured to include an imaging element (11) and a lens system (12) a polarizing filter (13) attached to each of the plurality of cameras (10L, 10R); a camera cover (30) that accommodates the plurality of cameras (10L, 10R); and an awning (31) extending in a field of view direction of the plurality of cameras (10L, 10R), wherein the awning (31) is an element common to the plurality of cameras (10L, 10R) and has a single flat portion extending in the field of view direction of the plurality of cameras (10L, 10R), wherein the multiple cameras (10L, 10R) are stereo cameras containing a right camera (10R) and a left camera (10L), the right camera (10R) images a left side with respect to a central axis of the stereo cameras (10L, 10R), the left camera (10L) images a right side with respect to the center axis of the stereo cameras (10L, 10R), the right camera (10R) and the left camera (10L) have a monocular field of view and a stereo field of view by overlapping part of the fields of view of the right camera and the left camera, and when a side of the awning (31) in contact with the camera cover (30) is a bottom side and a side facing the bottom side is a top side, the awning (31) has a shape in which the top side is shorter than the bottom side and longer than a distance between a left end of the field of view of the right camera at a position of the top side and a right end of the field of view of the left camera at a position of the top side.

Apparatus are described herein related to augmenting human vision by means of adaptive polarization filter grids. A preferred embodiment is described as smart sunglasses, realized as see through head mountable device (HMD) configured to reduce glare originating from polarized light. Each eyeglass of the HMD is associated with a grid comprising a plurality of dynamically configurable polarization filters placed in the path of the light. A polarization analyzer module analyzes the polarization characteristics of a field of view and performs an optimization calculation. The polarization analyzer controls the said grid via a controller module in such a way that the filter state of each grid element can be addressed separately. The grid of polarization filters causes the polarization characteristics of the incident light to be adapted in such a way as to reduce glare and / or to provide a user of the said head mountable device with an enhanced visual perception of the field of view. The user of the described head mountable device has the option of selection between a plurality of polarization enhancement modes, such as horizontal or vertical polarization filtering only or a hybrid mode combining both horizontal and vertical polarization filtering on an individual basis for each grid element. Additionally smart window and smart mirror embodiments of the described adaptive polarization filter grids are introduced.