133 results about "Polarizing filter" patented technology

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.

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 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.

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 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.

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.

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.

The invention discloses a visual identification and positioning method for processing a glass fiber plate part, which comprises the following steps of: arranging three cameras to shoot the glass fiber plate part in real time to obtain a positioning image group, carrying out overexposure point identification and edge point detection on images in the positioning image group, evaluating the image quality, generating an image overexposure signal or a normal positioning signal, and outputting the image overexposure signal or the normal positioning signal. If normal positioning signals are received, angular points are screened and matched, position coordinates of the angular points are calculated, glass fiber plate parts are recognized, geometric information of the glass fiber plate parts is obtained, the glass fiber plate parts are positioned, and if image overexposure signals are received, position information of the glass fiber plate parts on historical positioning nodes is obtained; calculating estimated position information of the glass fiber plate part, simulating three cameras to shoot the glass fiber plate part to obtain a simulated image, comparing the simulated image with the positioning image group, judging the accuracy of the estimated position information, if the estimated position information is not accurate, generating a temporary positioning-free signal, installing a polarizer for the cameras, and calculating the adjustment angle of the polarizer.

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 invention discloses a broadband circularly polarized filter patch antenna, comprising upper and lower dielectric substrates. The upper dielectric substrate is printed with a main radiating patch, a vertical rectangular parasitic patch, a horizontal rectangular parasitic patch, and an L-shaped patch. The main radiating patch is loaded with a rectangular slot. The vertical rectangular parasitic patch is placed along the y-direction of the upper dielectric substrate, the horizontal rectangular parasitic patch is placed along the x-direction, and the L-shaped patch is placed along the negative 45° diagonal of the main radiating patch. The lower dielectric substrate is printed with a floor and a microstrip feeder. A U-shaped slot is etched in the lower middle portion of the floor. Signals enter from a port, pass through the microstrip feeder, and are coupled to the main radiating patch through the U-shaped slot. The main radiating patch then couples and excites the surrounding parasitic patches. The broadband circularly polarized filter patch antenna provided by the present invention integrates circular polarization characteristics and bandpass filtering characteristics, achieving good impedance bandwidth and circular polarization bandwidth, and solving problems such as gain reduction and large size caused by the introduction of filtering circuits.

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.