72 results about "Planar Imaging" patented technology

The invention discloses a calibration method of a polarization focal plane imaging system and an imaging system, relates to the field of photoelectric imaging and remote sensing detection imaging, and solves the problems of low correction efficiency and difficulty in correcting a system with a changed polarization state in the conventional polarization error correction technology. According to the calibration method, a plurality of coding patterns and corresponding polarization modulation matrixes are obtained based on the collected uniform light field and serve as calibration results. The polarization error correction method comprises the steps of obtaining an observation intensity vector based on a target scene; a corresponding polarization modulation matrix is obtained based on the coding pattern according to a coding polarization modulation matrix lookup table, and then a down-sampling Stokes vector after polarization error correction is obtained; and completing the correction of the polarization error through an imaging reconstruction method. A polarization focal plane imaging system comprises an imaging lens, a DMD digital micromirror array coding module, a focal plane DoFP polarization detector and an imaging reconstruction module. The method is suitable for the fields of remote sensing detection, target identification, environment monitoring and the like.

A device for light field microscopy, comprising: a two-dimensionally spatially resolving detector for detecting light radiated by a sample; a detection beam path having at least one microscope objective lens; and at least one multi-lens array for imaging the light radiated by the sample onto the detector, wherein the multi-lens array is arranged in a plane which is optically conjugated with respect to a rear focal plane of the microscope objective lens, or in the vicinity of such a plane; and a control and evaluation unit for activating the detector and for evaluating the measurement data from the detector. The device also includes an adjustable relay optical system in order to image the rear focal plane of the microscope objective lens into the plane in which the multi-lens array is arranged, or in the vicinity of this plane. A method for light field microscopy is also provided.

The aerosol visual detection system comprises a base, a light source cavity, a smoke diffusion cavity and a camera shooting cavity are formed in the base in sequence, a shading insertion plate is inserted between the light source cavity and the smoke diffusion cavity, a transparent smoke isolation insertion plate is inserted between the smoke diffusion cavity and the camera shooting cavity, and the light source cavity, the smoke diffusion cavity and the camera shooting cavity are communicated through the transparent smoke isolation insertion plate. A plane light source is arranged on one side of the base, a cover plate is arranged on the other side of the base, a camera is arranged on the side, facing the camera shooting cavity, of the cover plate, and a smoke exhaust pull plate is detachably arranged at the front end of the smoke diffusion cavity. According to the aerosol visual detection system and the characteristic parameter evaluation method, the camera can directly obtain the two-dimensional space distribution of the aerosol through plane imaging, and in combination with an image analysis technology, not only can the concentration information be inverted, but also multi-dimensional characteristics such as textures, contours and dynamic diffusion can be extracted; the defects of a traditional photoelectric method in spatial information and multi-feature analysis can be overcome, and a new technical path is provided for fine detection and feature evaluation of aerosol.

Example embodiments relate to phase difference detection systems and method for detecting phase difference. One embodiment includes a phase difference detection system for a single target location. The system includes a laser source to generate a laser beam. The system also includes a phase difference detector coupled to the laser source and having a multi-layer structure. The phase difference detector includes a planar waveguide for guiding the laser beam. The phase difference detector also includes a grating coupler to split the laser beam into a reference beam and a measurement beam. Additionally, the phase detector includes a planar imager array forming a second layer of the multi-layer structure. Further, the phase difference detector includes an optical system configured to focus the measurement beam output from the phase difference detector on the single target location and to focus signals reflected at the target location to the phase difference detector.

The invention provides a honeycomb sandwich structure defect detection system and method based on a two-dimensional phased array sensor, and belongs to the technical field of nondestructive testing, the honeycomb sandwich structure defect detection system comprises the two-dimensional phased array sensor, the two-dimensional phased array sensor is a two-dimensional matrix array formed by arranging M * N sub-array elements which can be independently triggered to generate wave sources; the phased array ultrasonic unit is used for transmitting and receiving ultrasonic signals and sequentially exciting part of sub-array elements in the two-dimensional phased array sensor to synthesize electronic scanning sound beams, so that the sequence information of each electronic scanning sound beam corresponds to the spatial position information; and the signal processing and display unit obtains the ultrasonic signal, carries out reverse deduction by combining the sequence information of the electronic scanning sound beam to obtain space position information, and judges whether defects exist or not. Real-time plane imaging detection can be achieved without depending on movement of a mechanical driving sensor, and the method is convenient to use in a narrow space, is particularly applied to a honeycomb structure, can obviously distinguish whether abnormity of ultrasonic signals is caused by changes of the honeycomb structure or defects, improves the defect detection rate and reduces the misjudgment rate.

Methods and apparatus for transmission of volumetric images in the MPI format. According to an example embodiment, texture and alpha layers of multiplane images are packed, as tiles, into a sequence of video frames. The sequence of video frames is then compressed to generate a video bitstream, which is transmitted together with a metadata bitstream specifying at least the parameters of the packing arrangement for the tiles in the sequence of video frames. Example packing arrangements include various selectable spatial and temporal arrangements for texture layers, alpha layers, and camera views. In some examples, the metadata bitstream is implemented using a SEI message and includes parameters selected from the group consisting of a size of the reference view, the number of layers in the multiplane image, the number of simultaneous views, one or more characteristics of the packing arrangement, layer merging information, dynamic range adjustment information, and reference view information.

An eye tracking system operable to image an eye of a user includes an illumination source operable to illuminate the eye and an optical system including a first imaging surface, an aperture stop, and a second imaging surface. The optical system is operable to image an object plane corresponding to the eye. The eye tracking system also includes an image sensor having an image plane parallel to the first imaging surface, the second imaging surface, and the object plane.

The invention relates to the technical field of dental instrument manufacturing, and discloses a small-angle calibration method, system and equipment for an orthodontic bending machine. According to the method, a reverse calibration path of macroscopic feedback and microcosmic calibration is adopted, specifically, a steel wire is continuously bent for multiple times at the same target angle C, and single-time angle deviation is amplified and accumulated into macroscopic geometrical characteristic quantity; calculating a theoretical value E1 of the characteristic quantity, and comparing the theoretical value E1 with a measured value E1; and iteratively adjusting the target angle C until the theoretical value is matched with the measured value, thereby establishing an accurate mapping relation between the target angle C and the calibration angle D to compensate nonlinear errors such as material springback and the like. The invention further provides a special optical measuring device, the transparent substrate is combined with the ruler module with the deep-color scales and uniform backlight, so that the outline of the steel wire and the scale marks both present deep-color silhouettes with consistent optical characteristics in an image, and system errors caused by coplanar imaging of heterogeneous materials are fundamentally eliminated. The integral forming precision of small-angle bending is remarkably improved, and the technical problem of error accumulation in long-span component manufacturing is solved.

The invention discloses a measuring device and a related method for simultaneous shooting of TDLAS, PIV and PLIF in a reflection mode, and relates to the field of optical measurement, and the device comprises a first dichroscope which is arranged between a first camera in a PIV and PLIF measuring mechanism and a first measuring window of a to-be-measured flow field bearing mechanism; the second dichroscope is arranged between a second camera in the PIV and PLIF measuring mechanism and a second measuring window of the to-be-measured flow field bearing mechanism; during measurement, an infrared laser of the TDLAS measuring mechanism emits infrared laser to the first dichroscope, the first dichroscope reflects the infrared laser and irradiates the infrared laser into a flow field to be measured, and the infrared laser penetrating through the flow field to be measured enters the second dichroscope and then is reflected into a detector of the TDLAS measuring mechanism. According to the invention, simultaneous shooting of TDLAS, PIV and PLIF can be realized, and a plane image and a TDLAS absorption spectrum can be obtained at the same time in a to-be-measured flow field.

By performing full-circumference inspections and multi-surface inspections, which require multiple imaging means, with a single image processing unit, the inspection system can be made more compact and equipment costs reduced. [Solution] A multi-plane imaging system comprising an imaging section 1 having an illumination means 15 for illuminating an imaging object W and a plurality of imaging units 10 arranged at a distance around the imaging object, an imaging unit control section 22 for controlling the imaging units, an imaging control section 2 having an image synthesis section 21 for synthesizing a plurality of image signals from the imaging object acquired by the plurality of imaging units to create a single synthetic image, and communication means 3 for connecting the imaging section and the imaging control section. The imaging unit comprises imaging means, a plane mirror arranged on the optical axis of the imaging means and rotatable about the optical axis, and an imaging means holding section for holding the imaging means and the plane mirror.

The invention discloses a fluid inclusion automatic identification and grading method based on multi-focal plane imaging. The method comprises the following steps: acquiring a plurality of local high-definition digital images covering the whole surface of a rock sample slice; inputting the plurality of local high-definition digital images into an optimized target detection model for identification to obtain a bounding box position and a phase state category of each fluid inclusion; calculating the actual physical size of each inclusion on the basis of the pixel size obtained by the bounding box position and in combination with calibration parameters of a microscope system, and grading the actual physical sizes by adopting a clustering algorithm; and synthesizing the plurality of local high-definition digital images into a slice panorama marked with the bounding box position of each fluid inclusion, and generating a statistical report containing the phase state category, the actual physical size and the grading information of each inclusion. According to the invention, efficient and automatic positioning, classification, grading and data statistics of the fluid inclusion in the rock sample slice are realized.

Methods and apparatus for multi-plane imaging (MPI) video streaming. According to an example embodiment, a method for streaming MPI video includes generating a sequence of video frames, each of the video frames including a respective plurality of tiles representing a texture layer and a transparency layer of one or more multi-plane images of the MPI video; and applying video compression to the sequence of video frames to generate a video substream. The method further includes generating a representation sequence of atlas frames corresponding to the sequence of video frames to specify at least a packed arrangement of tiles, and applying a compression to the representation sequence to generate an atlas substream. The method further includes multiplexing the video substream and the atlas substream to generate a first encoded bitstream encoding at least a portion of the MPI video.

The utility model relates to the technical field of printed circuit board nondestructive testing, in particular to multilayer blind buried hole PCB testing equipment which comprises a base, a testing frame is connected to the top of the base, a moving motor is installed in the testing frame, a first lead screw is rotationally connected to the middle of the testing frame, an output shaft of the moving motor is connected with the first lead screw, and a second lead screw is installed in the testing frame. The detection frame is slidably connected with an installation frame, the installation frame is in threaded connection with the first lead screw, an X-ray scanner is installed at the bottom of the installation frame, and a clamping assembly used for clamping and rotating the multiple layers of PCBs is arranged in the base. Through synchronous scanning and data fusion of an X-ray scanner and a visual scanner, the highlight saturation effect of a copper plating area in single plane imaging is avoided, geometrical characteristics of openings of through holes and blind holes are accurately recognized, copper plating interference signals are stripped, buried hole density characteristics are extracted, accurate classification and positioning of the blind holes and the buried holes are achieved, and finally the hole type misjudgment rate is reduced.

The application relates to a calibration method of a polarization defocus plane imaging system and the imaging system, and relates to the fields of photoelectric imaging and remote sensing detection imaging. The application solves the problems of low correction efficiency and difficulty in correcting the system for polarization state changes in the existing polarization error correction technology. The calibration method is based on collected uniform light fields to obtain a plurality of encoding patterns and corresponding polarization modulation matrices as calibration results. The polarization error correction method is based on a target scene to obtain an observation intensity vector; based on the encoding pattern, a corresponding polarization modulation matrix is obtained according to an encoding polarization modulation matrix lookup table, and then a down-sampling Stokes vector after correction of the polarization error is obtained; and the correction of the polarization error is completed through an imaging reconstruction method. A polarization defocus plane imaging system comprises an imaging lens, a DMD (digital micro-mirror array) encoding module, a defocus plane DoFP polarization detector and an imaging reconstruction module. The application is suitable for the fields of remote sensing detection, target identification and environment monitoring.

Methods and apparatus for multi-plane image (MPI) video streaming. According to an example embodiment, a method for video streaming includes providing to a client device a media presentation description of MPI streaming content stored in a storage container accessible by a server device, and a corresponding initialization segment from the storage container. The respective initialization segment is configured to inform a client device of a selection of a perspective of the MPI streaming content for which a media segment for rendering is requested. The method also includes receiving a request from a client device, the request identifying the selection and indicating respective recommended values for at least one of bit rate, resolution, codec type, and frame rate; and transmitting, to the client device, one or more bitstreams carrying media segments selected in the storage container based on the identified selection and further based on one or more of the respective recommended values.

This invention discloses an antimony-based focal plane array imaging chip with an electron injection structure, belonging to the field of semiconductor photodetector technology. The chip includes a detector chip, a readout circuit chip, and an indium pillar structure interconnecting the two. The detector chip is fabricated by molecular beam epitaxy (MBE) to grow a specific structure epitaxial wafer, followed by double-mesa etching to form nanopillar units containing the electron injection structure, and then by passivation opening, metal electrodes, and indium pillars. After the readout circuit chip completes the UBM metal layer and indium pillar fabrication, it is flip-chip bonded to the detector chip. The finished product is obtained through substrate thinning, dicing and packaging, and testing. This chip utilizes the nano-lateral confinement effect to shorten carrier transit time and reduce dark current, and combines photonic crystal characteristics to enhance light absorption, solving problems such as crosstalk and slow response in traditional technologies. It achieves an optical gain of 4264 and a response time of <10ns, making it suitable for extremely weak light and ultra-high frame rate short-wave infrared imaging scenarios.

The invention discloses a single-plane micro free-form surface array aerial imaging device and a design method and application thereof, and relates to the technical field of optical imaging. The device adopts a single substrate plane, N * M micro free-form surface unit arrays are divided on the single substrate plane, each unit defines a surface type under a global coordinate system taking the center of the substrate as an original point, an object plane is imaged to a specific image plane, and a preset amplification factor beta is kept. C1 continuity between adjacent units is ensured through strict boundary constraint conditions, and seamlessly-integrated high-image-quality aerial imaging is achieved. The design method comprises the steps of parameter setting, mapping relation establishment, ray tracing equation construction, curved surface differential equation solving, continuity optimization and the like. The invention has the advantages of compact structure, high imaging quality, convenience in processing and the like, and is suitable for various application scenes such as suspension display, augmented reality and the like.

The invention relates to the technical field of biomorphological analysis, in particular to a pine wood nematode morphological intelligent detection system based on visual identification, which comprises the following modules: a microscopic imaging module used for collecting a multi-focal plane pine wood nematode image sequence and marking focal length and time information; the body fluid refraction response acquisition module is used for acquiring reflection and refraction spectrum information of nematode body fluid in the image sequence and generating body fluid spectrum data; and the contour distortion compensation module is used for establishing a refractive index dynamic model based on the body fluid spectral data, performing dynamic correction on nonlinear contour distortion generated by body fluid refraction in the image sequence data, and generating image data after contour compensation. According to the method, a dynamic body fluid refractive index model is established, and a dynamic contour distortion compensation algorithm is introduced, so that frame-by-frame dynamic correction on nonlinear contour distortion caused by non-uniform distribution of body fluid refraction under the microscopic multi-focal plane imaging condition is realized.

The invention discloses a speed measurement method and device, and the method comprises the steps: obtaining a frame of image generated by a plane imaging device for an object to be subjected to speed measurement, and the image comprises the object to be subjected to speed measurement; and determining the speed of the object to be subjected to speed measurement in any one-dimensional or multi-dimensional direction based on the deformation quantity of the marker in the image, the deformation quantity of the marker being determined based on the original shape of the marker and the imaging shape of the marker in the image. According to the method, the speed of the to-be-measured object in any one-dimensional direction in the three-dimensional direction can be determined based on the deformation quantity of the marker in the single-frame image, and measurement through multiple frames is not needed, so that the real-time performance of speed measurement is improved.

An observation apparatus comprises an irradiation optical system 22, a scanning unit 3, an image-forming optical system 4, and an imaging device 5. The irradiation optical system 22 irradiates an observation object B with planar light L1. The scanning unit 3 moves the observation object B at a constant speed in a direction crossing the planar light L1, and allows the observation object B to pass through the irradiation surface La of the planar light L1. The image-forming optical system 4 has an observation axis P1 crossing the irradiation surface La, and forms an image from observation light L2 generated at the observation object B by irradiation with the planar light L1. Every time the observation object B moves by a prescribed distance, the imaging device 5 acquires image data D1 including an optical image of the observation light L2. The scanning unit 3 outputs, on the basis of the moving distance of a moving stage 33, position information S for determining the exposure start timing when the imaging device 5 acquires the image data D1.

The utility model provides a kind of plane imaging experimental device, it is related to experimental appliance technical field, bearing table, bearing table outer wall is equipped with mounting piece, and mounting piece is equipped with acrylic plate in it, bearing table upper surface is divided into two experimental areas with acrylic plate as boundary;Folding ruler, two experimental areas are equipped with folding ruler, folding ruler includes main ruler and vice ruler, and rotationally connected between main ruler and vice ruler, vice ruler outside is equipped with magnetic attraction plate, and light source piece is magnetically attracted and installed on magnetic attraction plate, the angle change of detection vice ruler, the angle change of vice ruler can be known by observing digital display screen during experiment, compared with artificial observation ordinary protractor to adjust angle, using the digital display screen in the present scheme is more accurate, cancel traditional protractor, angle adjustment between main ruler and vice ruler is not easy to wear.

Techniques are provided for performing echo planar imaging (EPI) data correction. This includes obtaining positive and negative readout gradient calibration data of an imaging target through non-accelerated EPI acquisitions; respectively adopting first and second DPG kernels to be fitted and respectively used to eliminate phase errors of positive and negative readout gradients to fit the positive and negative readout gradient calibration data of the imaging target, with the fitting targets being positive and negative readout gradient data, respectively, in ghost-free target ACS data, and obtaining, after the fitting, a first and a second DPG kernel for final use; obtaining imaging data of the imaging target through an EPI acquisition; adopting the first and second DPG kernels to correct the phase errors of the imaging data to obtain phase-error-free imaging data.

High-resolution microscopy method for the three-dimensional position determination of objects, in particular individual fluorophores, preferably for spatially high-resolution luminescence microscopy of a sample (7) which is labelled with labeling molecules (1) which can be activated or switched with a signal such that they can only be excited to emit certain luminescence radiation in the activated state, wherein the method comprises the following steps: a) Introducing the signal onto the sample (7) such that only a subset of the labeling molecules (1) present in the sample (7) are activated, wherein the sample (7) contains subregions in which activated labeling molecules (1) are at least as far apart from the nearest neighboring activated labeling molecules (1) as is greater than or equal to a length which results from a predetermined optical resolution, b) Excitation of the activated molecules (1) to emit luminescence radiation, c) Detection of the luminescence radiation with the predetermined optical resolution, and d) Generating a single image from the luminescence radiation recorded in step c), wherein the geometric locations of the luminescence-emitting labeling molecules are determined with a spatial resolution increased above the predetermined optical resolution, where the steps are repeated several times and the resulting individual images are combined to form a complete image, characterized by the fact that an object is imaged via an imaging system (OB, TL) with a microscope objective (15, OB) onto an area detector (5, CCD) consisting of individual detector elements, wherein at least one microlens arrangement (ML, ZL), which is partially located in front of the detector elements, images a different object plane (OE1) onto the detector elements in the direction of light behind the microlenses than onto detector elements in front of which there are no microlenses.

This application relates to the field of medical device testing technology, specifically a phantom and method for coronal plane reflection detection in a three-dimensional imaging device. The phantom includes: a top panel and a sealed space inside the acoustic window filled with a background tissue-like material; target lines embedded in the background tissue-like material; an acoustic window, a window for ultrasonic wave transmission, simulating the acoustic characteristics of human epidermal tissue; the background tissue-like material is a water-based polymer gel-based composite material; target lines, with their upper ends fixed in openings in the top panel and their lower ends free; used for quantitative measurement of imaging parameters in the coronal plane, where the coronal plane is a plane parallel to the horizontal plane when the human body is prone on the three-dimensional ultrasound imaging device; the imaging parameters include the lateral linearity, longitudinal linearity, axial image resolution, and lateral image resolution of the reflected image in the coronal plane; the center-to-center distance between two adjacent target lines is a predetermined distance; the predetermined distance is determined by the resolution of the three-dimensional ultrasound imaging device at the corresponding position in the coronal plane.

A STEM educational building set (i.e., apparatus) consists of a double-side multiplane imaging display device that provides two simultaneous and distinct 2D / 3D scenes. Viewers with polarized goggles can observe 3D multiplane scenes (i.e., a 3D scene for each axial plane) by displaying two laterally separated images of the same scene with different polarization. The building set teaches users optics, exposing them to refraction law, lateral magnification, optical two-dimensional projection, and three-dimensional imaging.

The application discloses a kind of single-photon laser active-passive imaging detection radars, comprising: laser emission module, laser ranging receiving module, focal plane imaging detection receiving module, timing control and ranging signal processing module, active-passive imaging data separation module, data processing module;Laser ranging acceptance module accepts the laser echo signal of target reflection, and target distance calculation is completed by the timing control and signal processing module;The focal plane imaging detection receiving module is based on the periodic pulse string gate signal that the timing control and signal processing module emit, in the mth measurement period, active reception and processing of echo signal are completed, and passive reception and processing of n-1 measurement periods are completed;The active-passive imaging data separation module realizes the separation of active imaging detection data and passive imaging detection data;And by data processing module, according to preset data processing algorithm processing, corresponding target active imaging and target passive imaging are obtained.

A method for performing magnetic resonance imaging of an examination region using an echo-planar sequence, including: generating a theoretical model which represents an oscillating structure of a magnetic field generation unit, wherein as a result of an oscillation of the oscillating structure, eddy currents are induced in the oscillating structure and produce a gradient-type interference magnetic field in the examination region; determining the gradient-type interference magnetic field based on the theoretical model; applying the echo-planar sequence; receiving magnetic resonance signals from the examination region, wherein magnetic resonance raw data is generated based on the magnetic resonance signals; determining corrected magnetic resonance raw data based on the magnetic resonance raw data and based on the determined gradient-type interference magnetic field in the examination region; and reconstructing magnetic resonance image data based on the corrected magnetic resonance raw data.

Localization microscope comprising an imaging device for imaging a sample light-emitting sample (2) from a focal plane (3) into an image plane (9), - wherein the imaging device has an optical manipulation device (18) which is designed to influence a point image blurring function of the imaging in a depth-dependent manner and influences the point image blurring function of the imaging such that a point emitter in the image plane is mapped into a point emitter image (30, 32) which is rotationally asymmetrically distorted, - wherein a shape and / or orientation of the rotationally asymmetric distortion of the point emitter image (30, 32) depends on the position of the point emitter relative to the focal plane (3) and a wavelength of the sample light and - wherein the optical manipulation device (18) has a first and a second anisotropy element (22, 24), each of which anisotropically influences the point image blurring function of the imaging in order to generate the rotational asymmetry of the point emitter image (30, 32), and each of which has an anisotropy axis (23, 25), characterized in that - the two anisotropy elements (22, 24) are arranged one behind the other in the direction of the image and their anisotropy axes (23, 25) are at an angle to each other - and both anisotropy elements (22, 24) each have a neutral wavelength (λ1, λ2) at which they do not anisotropically influence the point image blurring function of the imaging, - where the neutral wavelengths (λ1, λ2) are different.

A segmented planar imaging system based on a beam splitter includes a lens array comprising lens columns. Microlenses within each lens column are paired to form baselines. These baselines are formed by the interference of light rays from two microlenses as a set of interference beams. Each microlens has two baseline formation methods. The imaging system also includes a photonic integrated circuit and an image processing module. The photonic integrated circuit includes an integrated beam splitter, an arrayed waveguide grating, waveguide transmission lines, and multiple balanced quadrature detectors. Each lens column is connected to one photonic integrated circuit. In this segmented planar imaging system, each microlens participates in forming two baselines via a beam splitter, and individual interferometer arms employ complementary baseline pairing methods. This increases the acquisition of spatial frequency information lacking in traditional systems, further improving the imaging quality of the system.

Methods and apparatus for transmission of volumetric images in the MPI format. According to an example embodiment, texture and alpha layers of multiplane images are packed, as tiles, into a sequence of video frames. The sequence of video frames is then compressed to generate a video bitstream, which is transmitted together with a metadata bitstream specifying at least the parameters of the packing arrangement for the tiles in the sequence of video frames. Example packing arrangements include various selectable spatial and temporal arrangements for texture layers, alpha layers, and camera views. In some examples, the metadata bitstream is implemented using a SEI message and includes parameters selected from the group consisting of a size of the reference view, the number of layers in the multiplane image, the number of simultaneous views, one or more characteristics of the packing arrangement, layer merging information, dynamic range adjustment information, and reference view information.