74 results about "Polarizing filter" patented technology

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.

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.

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 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.

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.

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.

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.

A polarizing film inspection device includes a jig on which a display device including a polarizing film and a display panel is seated, a polarizing filter disposed on an upper portion of an edge of the polarizing film and having a polarization angle different from a polarization angle of the polarizing film, a transmission lighting disposed on a lower portion of the edge of the polarizing film and emitting light toward the edge of the polarizing film, a camera disposed on an upper portion of the polarizing filter, and a control unit which determines whether the polarizing film is defective by analyzing an image captured by the camera.

Display system for a motor vehicle, comprising: - a windscreen (2) of the motor vehicle with a second polarizing filter (4); - a display device (10) for outputting an image-bearing display light, - a reflective surface (R) provided on the windscreen (2) or a separate combiner screen to reflect the image-carrying display light into an eye area (9) of a vehicle occupant; - a sun visor arrangement (20, 20') for mounting on a roof liner (13) of the motor vehicle, comprising: ◯ an adjustable sun visor leaf (21, 21') which is arranged on the headliner of the motor vehicle via a first hinge (23), ◯ a transparent screen (22, 22') with a first polarizing filter (26), and ◯ an adjustment device (23, 24, 25) arranged on or in the sun visor blade (21) to adjust the shade (22, 22') between a parking position and a use position; wherein in the parking position the shade (22, 22') is arranged outside the field of vision of a vehicle occupant and in the use position the shade (22, 22') is arranged between a surface of the windscreen (2) and an eye area (9) of the vehicle occupant.

Provided is a lens device, an optical filter unit, and an imaging device that can suppress the generation of ghost images. The lens device includes an optical filter unit in an optical path. The optical filter unit includes a plurality of openings including a first opening and a second opening, at least the first opening and the second opening include a band-pass filter, and at least one of an object side and an image side of the band-pass filter includes an optical element. The optical element includes a polarizing filter and a wave plate that converts linearly polarized light into circularly polarized light or elliptically polarized light, and the first opening and the second opening pass light of mutually different wavelength regions and polarization directions.

Image sensors and devices for phase-detection auto focus processes are provided. A symmetric polarization filter includes a first polarizer defining a first plurality of apertures and a second polarizer adjacent with the first polarizer defining a second plurality of apertures. The first plurality of apertures can be mirror symmetrical with the second plurality of apertures about a lateral axis of the symmetric polarization filter between the first polarizer and the second polarizer. The lateral axis can be defined as an axis of symmetry of the symmetric polarization filter in plane with the first polarizer and the second polarizer.

The present disclosure concerns a method for characterizing a photovoltaic module, by means of a device for characterizing a photovoltaic module, the characterizing device comprising a light source so as to illuminate an object, a spectrometer comprising an optical acquisition axis and a polarizing filter comprising a polarization axis and arranged in front of the spectrometer, the light reflected by the object passing through the polarizing filter to be subsequently captured by the spectrometer, and a processing unit.

This inspection system (100) comprises: a first illumination unit (31) in which a first polarizing filter (31a) is disposed and that irradiates a resin molded article (200) with illumination light; a first imaging unit (32) in which a second polarizing filter (32a) having a polarization axis angle deviated from that of the first polarizing filter (31a) is disposed and that images the resin molded article (200); and a control unit (41) that performs control to detect, on the basis of a first inspection image (71) of the resin molded article (200) captured using the first illumination unit (31) and the first imaging unit (32), a silver defect (61) that occurs as a silver-colored defect on the resin molded article (200) due to an abnormality during resin molding.

An optical filter including a superposition of: at least first and second resonant cavities; and at least a first polarizing filter.

The invention discloses a three-dimensional reconstruction method, device and equipment and a storage medium, and relates to the technical field of industrial visual inspection, and the method comprises the steps: obtaining polarization images, synchronously collected by a plurality of line scanning TDI imaging regions, of a target element in different polarization directions, and calculating the polarization parameters of pixel points based on the polarization images; determining the relative depth of the pixel points based on the polarization parameters of the pixel points; converting the relative depth of the pixel point into a corresponding absolute depth based on the mapping relation between the relative depth and the absolute depth obtained through calibration; and performing three-dimensional reconstruction based on the relative depth of the pixel points and the absolute depth of the pixel points to obtain a three-dimensional model of the target element. Absolute depth reconstruction is realized by using the polarization filter and standard object calibration, no additional light source or complex equipment is needed, high-speed and high-precision detection is realized by using multi-angle polarization information synchronous acquisition and depth optimization, multiple targets with different depths can be processed at the same time, and the adaptability in a multi-target scene is improved.

A method for producing printed wood veneer sheets comprises capturing high-resolution digital images of source wood veneer using polarized lighting and a digital camera with a polarizing filter; digitally processing and aligning the images to create a seamless composite image with enhanced color and grain detail; and printing the composite image directly onto a natural wood veneer substrate using a large-format UV flatbed printer with UV-curable inks. The method enables replication of rare, endangered, or extinct wood species on sustainable substrates while preserving the tactile qualities of natural wood and achieving superior visual fidelity. The printed veneer sheets may be used in furniture, cabinetry, architectural millwork, and other applications.

In a first aspect, the invention relates to an optical arrangement (1, 12) for a diffractive display. Said display has, in sequence along a direction of extent, a first reflective diffraction grating (15), a polarisation modulator (16), a second reflective diffraction grating (17) and a polarisation filter (18) for the first polarisation, the second polarisation being a transmission polarisation. The polarisation modulator (16) is configured to convert, at least in part, a portion of light having a first linear polarisation and a portion of light having a second polarisation, perpendicular to the first polarisation, into one another, the portions depending on the angle of incidence of the light on the polarisation modulator (16). The second reflective diffraction grating (17) is configured to diffract light with a first angle of incidence on the diffraction grating at least partially in the direction of the first reflective diffraction grating (15) with a first angle of emergence, and the first reflective diffraction grating (15) is configured to diffract diffracted light from the second reflective diffraction grating (17) at least partially with a second angle of emergence in the direction of the polarisation filter (18). The portion of the light which is converted by the polarisation modulator (16) from the first polarisation to the second polarisation or, conversely, from the second polarisation to the first polarisation is not the same for the second angle of emergence as for the first angle of emergence. Further aspects of the invention relate to a display device having the optical arrangement.

This invention relates to an image reading device. An image reading device (100) for reading an image of an object M and detecting a transparent sheet in contact with the object M includes: light guides (2A and 2B) that irradiate the object M, which is transported in a sub-scanning direction orthogonal to the main scanning direction, with light extending along the main scanning direction; polarizing filters (13) that align the vibration direction of the light irradiated by the light guides (2A and 2B); a lens (8) that images the light from the object M and the transparent sheet based on the light whose vibration direction is aligned by the polarizing filters (13A and 13B); a UV-cutoff 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 is aligned by the UV-cutoff 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 object M based on the electrical signal output by the sensor chip (11).

The invention relates to the technical field of high-speed line production in the iron and steel industry, and discloses a machine vision and edge feature analysis-based real-time detection method for square billet bent steel. Comprising the steps of (1) equipment deployment and edge feature special calibration, (2) square billet dynamic triggering and synchronous image acquisition, (3) edge enhancement preprocessing, (4) edge detection and dynamic verification, (5) edge coordinate segmentation fitting and bent steel calculation and (6) bent steel judgment, intelligent output and edge quality feedback. The edge extraction environment is thoroughly improved through the combination optimization of camera inclined installation, double-path inclined light supplement and polarization filter, the camera is installed at the angle of 15 degrees towards the center line of a roller way, square billet surface light reflection during vertical shooting is avoided, and the edge light reflection fuzzy rate is reduced to 5% or below from 20% of an original scheme; the double-path pulse light supplementing group reinforces the edge through light and shade contrast, original direct light supplementing is replaced, and the problem that the edge is covered by light spots is reduced by 90%.

This invention relates to the field of printing machinery manufacturing technology and discloses a printing roller rounding machine with machine vision flaw detection. The machine includes a base with a groove on its top. A movable seat is slidably connected to the inner side of the groove. A flaw detection mechanism is located on the top right side of the movable seat. The flaw detection mechanism includes a bracket, which is fixedly connected to the rear end of the top right side of the movable seat. A hydraulic rod is fixedly connected to the inner side of the bracket, and a connecting rod is rotatably connected to the top of the hydraulic rod. An arc-shaped plate is rotatably connected to the front side of the bracket. This invention uses a motor to drive a lead screw to rotate, which in turn moves the movable seat, enabling the flaw detection mechanism and the rounding mechanism to move freely along the printing roller axis. It can perform full-coverage scanning of printing rollers of different lengths and specifications, and uses a polarizing filter in conjunction with a lamp inside a hollow plate to supplement lighting, eliminating specular high-gloss reflections on the surface of the metal printing roller.

The invention relates to a system (1) for improved reference pattern recognition comprising an optical sensor (K), wherein at least two polarization filters (P1, P2) are arranged one behind the other in the direction of the image axis of the optical sensor, wherein the at least two polarization filters (P1, P2) are adjustable relative to each other, wherein at least one of the polarization filters (P1, P2) is electrically controllable for the purposes of adjustment, wherein the system further comprises a processing unit (uC) which, depending on an image captured by the optical sensor (K) and at least one further setting of the optical sensor (K), controls the at least one electrically controllable polarization filter (P1, P2) such that the polarization planes of the at least two polarization filters (P1, P2) are adjusted relative to each other when no reference pattern is recognized in the captured image.

Disclosed are an optical multiplexer (100, 100 ', 200, 200'), an optical demultiplexer, an optical transmitter comprising the optical multiplexer (100, 100 ', 200, 200'), an optical module comprising the optical transmitter and the optical demultiplexer, and methods of using the same. An optical multiplexer (100, 100 ', 200, 200') includes first and second beam combiners (110, 120), a polarized beam combiner (130), and an optical isolator (140). The first and second beam combiners (110, 120) each comprise a reflective surface and at least one optical filter for combining individual optical signals having the same polarization state into a multi-channel polarized optical signal. However, the two independent multi-channel polarized light signals have different polarization states. The polarized light beam combiner (130) comprises one or more reflecting surfaces and one or more polarization filters, and is used for combining the multi-channel polarized light signals into multi-channel output signals. The structure of the optical demultiplexer is similar to that of the optical multiplexer (100, 100 ', 200, 200'), but provides complementary or opposite functions. According to the multiplexer and the demultiplexer, the four-wave mixing effect is reduced.

The invention relates to the technical field of machine vision, in particular to a circuit board production detection method and system based on machine vision and a medium. The method comprises the following steps: shooting a multi-angle image of a to-be-detected circuit board by using a preset shooting lens; determining a board reflection area according to the gray gradient difference condition of the multi-angle image; identifying a reflection interference region and a corresponding polarization direction based on the gray level distribution condition of the plate surface reflection region; adjusting the angle of a polarization filter at the front end of a shooting lens according to the polarization direction so as to recollect a full image of the circuit board; optimizing a corresponding board surface reflection area in the multi-angle image by using the full-width image of the circuit board to obtain a multi-angle optimized image; performing color layering on the multi-angle optimized image, and determining surface feature points of the circuit board; and comparing the surface feature points of the circuit board by using the standard circuit board feature library to generate a circuit board detection report. According to the invention, the detection efficiency and the automation level can be improved, and false detection and missing detection can be reduced.

The invention discloses a UHPC appearance quality detection system based on an image sensor and a method thereof, and relates to the technical field of UHPC appearance quality detection.According to the method, reflection interference is inhibited through a polarization filter to obtain a basic image, three-dimensional space characteristics of pits and holes are extracted through structured light stripe distortion detection, illumination balance is achieved in combination with self-adaptive light supplement, and the detection accuracy is improved. The contrast ratio of the crack and the hole is enhanced through the atomized water film, so that a high-quality image data set is constructed; based on the image set, calculating a crack index, analyzing a surface pore area proportion to calculate a surface pore index, obtaining a color difference index of the defects and a reference region through a color space, and performing threshold judgment and strategy generation on the three types of defects; when any two types of indexes exceed thresholds, a defect linkage evaluation mechanism is started; when the three types of indexes exceed thresholds at the same time, a composite defect risk judgment mechanism is triggered, and high-risk component classification, factory freezing, process correction and same-batch rigorous reinspection are achieved.

Device (100) for demonstrating the visual impression for a wearer (170) of spectacles (400) with polarizing lenses (410a, 410b) comprising: a) a memory (152) for providing a first image (114, 210, 310) with a motif and an associated first polarization direction; b) a memory (152) for providing a second image (116, 220, 320) with the same motif and an associated second polarization direction different from the first polarization direction; c) a display device (110) for displaying the first image (114, 210, 310) with light polarized in the first polarization direction and the second image (116, 220, 320) with light polarized in the second polarization direction in a superimposed, namely composite, representation (118, 230, 330), such that the motif of the first image (114, 210, 310) and the motif of the second image (116, 220, 320) coincide in form identically, where (cl) the first image (114, 210,310) is a photograph taken by a camera with a polarizing filter in front of it, having a first polarization axis, and the second image (116, 220, 320) is a photograph taken by a camera with a polarizing filter in front of it, having a second polarization axis different from the first polarization axis, or (c2) the first image (114, 210, 310) is a photograph taken by a camera with a polarizing filter in front of it, having a first polarization axis, and the second image (116, 220, 320) is a computer-generated modification of the first image (114, 210, 310), such that the second image (116, 220, 320) corresponds to a photograph taken by a camera with a polarizing filter in front of it, having a second polarization axis different from the first polarization axis.

The invention discloses a polarizing film inspection apparatus, a polarizing film inspection method, and an electronic device. The polarizing film inspection apparatus includes: a jig on which a display device including a polarizing film and a display panel is placed; a polarizing filter disposed at an upper portion of an edge of the polarizing film and having a polarization angle different from a polarization angle of the polarizing film; a transmissive illumination part disposed at a lower portion of an edge of the polarizing film and emitting light toward the edge of the polarizing film; the camera is arranged at the upper part of the polarization filter; and a control unit that determines whether or not the polarizing film is defective by analyzing the image captured by the camera.

The utility model relates to the technical field of agriculture, in particular to an angle-adjustable mounting structure for an anti-dazzle touch screen of agricultural machinery, which comprises a supporting main rod, an adjusting component is arranged at the top of the supporting main rod, a splicing component is arranged at the bottom of the supporting main rod, and the adjusting component comprises a fixed base. The fixing base is fixedly connected to the top of the supporting main rod, and a fixing penetrating hole is formed in the fixing base. According to the angle-adjustable mounting structure for the anti-dazzle touch screen of the agricultural machine, the supporting main rod can serve as a main support of the structure by mounting the adjusting assembly, a user can mount the fixing bottom plate on the fixing base at the top of the supporting main rod through the fixing through hole and the fixing long bolt, and then a display screen of the agricultural machine is mounted on the screen mounting base; in this way, during use, the upper embedded frame can be adjusted to a proper position, so that the agricultural machine display screen can be watched through the polarized light filter, and the problem of misoperation caused by field strong light reflection is solved.

This invention discloses a novel foldable backlight system suitable for head-up display (HUD) systems, comprising: a lamp panel assembly; a collimating lens for collimating white light emitted from LED beads; a spherical reflector for reflecting and shaping the collimated light; a beam expander for diffusing and homogenizing transmitted light; and an S-polarizing filter for filtering P-polarized light within the backlight. The light path is as follows: white light emitted from the lamp panel assembly passes through the collimating lens, is projected onto the spherical reflector, reflected by the beam expander, transmitted through the S-polarizing filter, and finally illuminates a 4.1-inch TFT screen. This invention also discloses a motor vehicle incorporating the above-described novel foldable backlight system, and a backlight display method. The HUD backlight system of this invention has the advantages of reducing surface heat of the TFT screen and minimizing the size of the PGU (Power Gear Unit).