27results about How to "Improve imaging resolution" patented technology

This invention discloses a high-definition lens, comprising a first lens, a first cemented lens group, an aperture stop, a fourth lens, and a fifth lens arranged sequentially from the object plane to the image plane; wherein the first lens and the fourth lens have negative optical power; the first cemented lens group and the fifth lens have positive optical power, and the fifth lens has a biconvex structure; the focal length of the lens is f, and the focal length of the first cemented lens group is f. U1 f U1 The following relationship exists between f and f: 0.35 < |f U1 / f|<0.90. The lens formed by this invention is not only compact and economical, but also ensures high imaging resolution, small aperture and low distortion, which can meet the needs of industrial applications and has great market prospects and economic value.

The application relates to a space target joint imaging and attitude inversion method based on a spaceborne platform, and relates to the field of inverse synthetic aperture radar imaging, in particular to a space target joint imaging and attitude inversion method based on a spaceborne platform. The application aims to solve the problems that in the existing space target imaging process of a spaceborne platform, three-dimensional high-order space-variable range migration and phase errors caused by complex relative motion between the target and the platform are difficult to realize high-precision imaging, and the existing attitude estimation algorithm needs to be completely compensated for the rectangular component segmentation and orbit error before the attitude inversion can be realized. The process is as follows: one, a narrowband tracking system of a radar obtains target slant range and a radar line-of-sight unit vector; two, a wedge-shaped transformed signal is obtained; three, spatial Doppler parameter distribution of a special point is obtained; four, an imaging result is obtained; and five, accurate estimation of target attitude parameters is completed through plane coefficient fitting.

The utility model discloses a thermal neutron imaging detector based on a TFT area array detector, comprising a housing, a TFT substrate and a scintillator layer, the TFT substrate and the scintillator layer are both arranged in the housing, the TFT substrate comprises a substrate layer and an optical adhesive layer, the scintillator layer is arranged on the optical adhesive layer, and the scintillator layer is arranged on the substrate layer. The optical adhesive layer is matched with the scintillator layer to optimize optical signal transmission and improve imaging resolution; according to the TFT area array detector, the optical adhesive layer is arranged on the surface of the substrate layer of the TFT area array detector, and the optical adhesive layer is combined with the scintillator layer, so that optical signal transmission is optimized, and the imaging resolution is improved.

This invention discloses a multi-frequency ultra-wideband ground-penetrating sonar device, method, storage medium, and program product. The device includes a host subsystem for generating a first multi-frequency ultra-wideband acoustic signal and generating an array element spatiotemporal control sequence based on the current operating mode; an air-coupled multi-frequency transceiver array subsystem for radiating a second multi-frequency ultra-wideband acoustic signal into the underground solid medium based on the array element spatiotemporal control sequence after receiving the first multi-frequency ultra-wideband acoustic signal, and receiving the echo signal radiated back into the air from the underground solid medium; wherein the second multi-frequency ultra-wideband acoustic signal is incident on the underground solid medium after passing through the air-solid interface in sequence, and the echo signal is a longitudinal wave formed at the surface by various elastic wave responses; a data processing subsystem is used to perform multi-frequency collaborative processing and spatial inversion on the echo signal to obtain a multi-dimensional image of the underground solid medium. Thus, the detection efficiency is improved while ensuring the detection depth.

A forward active noise reduction circuit for a gradient coil belongs to the technical field of MRI (magnetic resonance imaging) equipment and solves the problem of how to reduce electromagnetic noise in gradient coil current and improve imaging quality. An input end of an amplifier PA1 receives an input signal, an output end of the amplifier PA1 is connected with one end of a secondary side of a current transformer Tc1, and an output end of the current transformer Tc1 is connected with the other end of the secondary side of the current transformer Tc1; the other end of the secondary side of the current transformer Tc1 is connected with one end of the gradient coil, and the other end of the gradient coil is connected with the grounding end of the amplifier PA1; effective components in driving current output by the gradient power amplifier are eliminated through the subtracter, the current transformer is coupled to the gradient coil, noise components in the driving current are counteracted, electromagnetic noise generated when the gradient power amplifier drives a high load is eliminated, noise reduction and suppression are carried out on the gradient coil, and the signal purity is improved. Therefore, the imaging resolution and the system reliability are improved.

This invention belongs to the field of image transmission fiber technology and discloses a bend-insensitive high-resolution image transmission fiber and its fabrication method. The image transmission fiber provided by this invention comprises several image transmission cores and a co-cladding layer between the image transmission cores; each image transmission core includes, from the inside out, a core layer, a recessed layer, an inner cladding layer, and a light-absorbing layer; the light-absorbing layer is quartz glass containing absorber ions and fluorine. The fabrication method of the image transmission fiber provided by this invention includes preparing a light-absorbing core rod, drawing the light-absorbing core rod to obtain a light-absorbing capillary rod, stacking several light-absorbing capillary rods in a pure quartz glass sleeve to obtain an image transmission fiber preform, and drawing the image transmission fiber preform to obtain a bend-insensitive high-resolution image transmission fiber. This invention can improve the imaging resolution of the image transmission fiber, and the fabrication method has the advantages of simple and convenient process and strong production stability.

This invention discloses an AI-based multi-source, multi-receiver inter-well seismic data acquisition, processing, and interpretation system and method, relating to the interdisciplinary field of artificial intelligence and geophysical exploration. The system includes: multiple downhole artificial seismic sources, multiple inter-well seismic signal receiving devices, a distributed acquisition and control network, and an AI processing and interpretation platform. This invention supports four stereoscopic acquisition modes: single-well excitation of adjacent well reception, single-well excitation of multiple well reception, multiple-well excitation of single-well reception, and multiple-well excitation of multiple well reception. Through deep learning models, it achieves intelligent denoising, automatic first arrival picking, intelligent wavefield separation, AI-driven full-waveform inversion velocity modeling, intelligent amplitude-preserving migration imaging, and reservoir fluid prediction. Finally, it combines reinforcement learning to optimize development well deployment. This invention realizes intelligent management of the entire process of inter-well seismic data acquisition, processing, and interpretation, significantly improving the acquisition efficiency, imaging resolution, and reservoir description accuracy of inter-well seismic data.

The invention discloses an in-cabin looking-around confocal lens and a camera device and a driving tool with the same, the lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from an object side to an image side, and the following conditions are met: 13.14 lt; fOV / Ym / 2lt; 24.36, FOV is the angle of view of the lens, and Ym is the image height of the lens corresponding to the FOV. According to the invention, large-view-field coverage is realized, and the consistency of visible light and infrared imaging is considered at the same time; it is ensured that the lens can shoot high-definition pictures at the high temperature of + 125 DEG C and the low temperature of-40 DEG C; the imaging resolution is high, the MTF level is kept excellent in a full-view-field range, and center and edge imaging is balanced; the aberration correction capability is outstanding, the chromatic aberration control is excellent, the chromatic aberration is stably controlled within 2pixel, and the purple edge inhibition effect is remarkable; and when the field angle is 80 degrees, the relative illumination is higher than 50%, and the image brightness distribution is uniform.

The invention discloses a low-light-level lens, which comprises a first lens group with positive focal power or negative focal power and a second lens group with positive focal power, and is characterized in that the first lens group comprises a first lens with negative focal power, a second lens with negative focal power and a third lens with positive focal power; the second lens group comprises a fourth lens with positive focal power, a fifth lens with negative focal power, a sixth lens with positive focal power, a seventh lens with positive focal power, an eighth lens with negative focal power and a ninth lens with positive focal power; the combined focal power of the fourth lens, the fifth lens and the sixth lens is phi 456, the combined focal power of the seventh lens, the eighth lens and the ninth lens is phi 789, and the focal power of the low-light-level lens is phi; wherein phi 456 / phi is larger than 0.05 and smaller than or equal to 0.245, and phi 789 / phi is larger than or equal to 0.415 and smaller than or equal to 0.565. According to the technical scheme, the number of the lens groups, the number of the lenses, the focal power matching mode of the lens groups, the focal power matching mode of the lenses and specific values in the low-light-level lens are reasonably set, so that the design of the low-light-level lens with a large aperture can be realized.

The application relates to a miniature spectral imaging chip and a miniature imaging spectrometer, and belongs to the technical field of spectral imaging. The chip comprises, from top to bottom, an optical filtering layer, an image sensing layer and a signal processing layer. The optical filtering layer is composed of a transparent medium substrate and a plurality of different micro-nano structure units, each of which comprises a plurality of micro-nano structure arrays. The micro-nano structure arrays are single-layer or multi-layer structures. Each micro-nano structure unit covers a single or multiple photosensitive pixel units on a photodetector array layer. The area of the photodetector array layer covered by the micro-nano structure unit is a spectral chip area. The image sensing layer comprises the photodetector array layer and a metal circuit layer arranged on the photodetector array layer. The application realizes high spectral resolution and high image resolution in a very small volume.

The application discloses a cavity inner wall optical detection system. The cavity inner wall optical detection system comprises a reflection module and a refraction module arranged in sequence from an object plane to an image plane; the reflection module comprises a mirror; the refraction module comprises an objective lens group and an eyepiece group arranged in sequence from one side of the object plane to the image plane, the objective lens group comprises a first lens with negative optical power and a second lens with positive optical power; the eyepiece group comprises a third lens with positive optical power and a fourth lens with negative optical power; and the reflection module and the refraction module are coaxially arranged. The reflection imaging technology of the reflection module and the refraction imaging technology of the refraction module are combined to realize the detection of the cavity inner wall, and the system has simple structure, high imaging resolution and high field of view utilization.

The invention discloses a terahertz defect detection device based on a multiple-input-multiple-output array, and relates to the technical field of testing. The device comprises a portal frame, a transmission table, a defect detection array front end, a microwave signal generation module and a data acquisition and control module, the defect detection array front end is fixed on the portal frame, is connected with the microwave signal generation module and is used for detecting defects of a sample to be detected, and the data acquisition and control module is connected with the transmission table. Comprising a terahertz signal generating array, a terahertz signal receiving array and a transmitting and receiving antenna module, and array elements in the terahertz signal generating array and the terahertz signal receiving array are arranged at equal intervals in a staggered mode; the transmission table is positioned below the front end of the defect detection array and is used for placing a sample to be detected, and the portal frame, the transmission table, the front end of the defect detection array and the microwave signal generation module are respectively connected with the data acquisition and control module. The device disclosed by the invention is high in integration level, high in stability and high in imaging efficiency, and realizes rapid, efficient and nondestructive detection on the defects of the non-metallic material.

An elliptical longitudinal phase singularity based laser ultrasonic detection method, comprising: generating an elliptical longitudinal phase singularity structure as a detection light field to be used; the elliptical longitudinal phase singularity interacts with the detected acoustic surface wave to load the acoustic wave signal on the detection light field; the elliptical longitudinal phase singularity light field after loading the detection signal is diffracted through a detection mask to form a diffracted light field; the diffracted light field is processed through an optical path, and the light field is analyzed; the intensity fluctuation of the light spot obtained after analysis is measured by using a photoelectric detector, and the measured signal is processed by a computer. The application improves the increase of signal sensitivity in the detection direction, refreshes the acoustic surface wave detection frequency limit, and further improves the imaging resolution of the laser ultrasonic microscopic imaging technology.

The utility model provides a lockset CCD size detection device, and the device includes detection station, carousel, detection frame and sets up on the CCD detection subassembly of detection frame, and the detection station, carousel, detection frame have reserved mounting hole, and the detection frame landing point is established on the detection station and carousel, and the fixed connecting hole for being equipped on the CCD detection subassembly part, the CCD detection subassembly includes, and the XY movement device of installing on the detection frame, and the XY movement device includes X direction movement module and Y direction movement module, and Y direction movement module installs the CCD detection camera, the utility model reduces the CCD camera movement error, improves the lockset detection precision and detection efficiency.

The utility model discloses a kind of electrostatic chuck assembly and charged particle beam device, wherein the electrostatic chuck assembly includes: electrostatic chuck, for carrying wafer;Annular electrode, it is set around the electrostatic chuck;The vertex height of the annular electrode is higher than the upper surface of wafer placed on the electrostatic chuck.The utility model by the vertex height of annular electrode is set as higher than the upper surface of the wafer, make the equipotential line between wafer edge and annular electrode become gentle, improve the electric field distribution uniformity of wafer edge, and then promote the imaging quality and imaging resolution of charged particle beam device.

The invention provides a spectrum inversion high-resolution processing method based on strong axis stripping, and relates to the field of seismic exploration, and the technical scheme is that the spectrum inversion high-resolution processing method based on strong axis stripping is characterized by comprising the following steps: inputting original seismic data, and extracting strong reflection wave event seismic data; subtracting the extracted strong reflection wave event seismic data from the original seismic data to obtain seismic data after strong reflection suppression; replacing the original seismic data with the seismic data subjected to strong reflection suppression, and establishing a spectrum inversion objective function; and solving the spectral inversion objective function to obtain a high-resolution seismic section which suppresses strong reflected waves and highlights weak signals. The method has the advantages that a spectral inversion high-resolution processing mechanism based on strong axis stripping is clear, and time domain iteration deconvolution stripping of the strong reflection wave event, spectral inversion high-resolution processing stripping of the strong reflection wave event, strong reflection suppression and spectral inversion high-resolution thin layer recognition are involved.

This invention belongs to the field of laser micromachining and relates to a coaxial monitoring system for ultrafast laser micromachining. The system includes an ultrafast laser, a beam-splitting plate, a laser focusing lens, an intermediate lens group, a filter, a fixed-magnification telecentric lens, and a high dynamic range camera. The ultrafast laser emits ultrafast laser light. The beam-splitting plate and the laser focusing lens are arranged sequentially from front to back along the optical path of the ultrafast laser. The laser focusing lens focuses the ultrafast laser light onto the workpiece, generating visible monitoring light on the workpiece. The visible monitoring light passes through the laser focusing lens and is reflected by the beam-splitting plate to form reflected visible monitoring light. The intermediate lens group, filter, fixed-magnification telecentric lens, and high dynamic range camera are arranged sequentially from front to back along the optical path of the reflected visible monitoring light. This invention provides a coaxial monitoring system for ultrafast laser micromachining that improves imaging clarity and resolution.

The present application relates to the field of oil and gas drilling development, in particular to a kind of high temperature and high pressure wellbore multiphase flow visualization device and method based on MIT imaging.The technical scheme is: including temperature and pressure monitoring unit, data processing and three-dimensional imaging unit, also including wellbore simulation unit and MIT magnetic induction imaging unit, MIT magnetic induction imaging unit is installed on wellbore simulation unit;Silicon carbide wellbore is filled with three-phase experimental fluid, for adapting the simulation needs of different well diameters, and silicon carbide wellbore is installed in the center of first center variable-diameter mechanism, second center variable-diameter mechanism and third center variable-diameter mechanism;Composite heat insulation layer is arranged outside silicon carbide wellbore, and the beneficial effect is: the present application can adapt to high temperature and high pressure working condition, magnetic signal has strong anti-interference ability, the monitoring of three-phase experimental fluid is realized by the combination of the rapid adjustment of center variable-diameter mechanism and magnetic induction fault imaging technology, and it has high imaging resolution, which is of great significance to promote the progress of deep oil and gas drilling development technology.

The application discloses a fluorescent molecular probe based on triphenylamine derivative and a preparation method and application thereof, and belongs to the technical field of fluorescent molecular probes. The application solves the problems of low sensitivity, slow response speed and poor selectivity of the current fluorescent molecular probe for H2S level detection. The application uses 5-(4-(diphenylamine)phenyl) thiophene-2-carboxaldehyde and 4-amino-3-hydroxybenzoic acid to prepare a triphenylamine derivative, and the derivative can be used as a fluorescent molecular probe HBA for detecting H2S. In the detection process, H2S is coordinated with the carbon-nitrogen double bond in HBA and the oxygen in the hydroxyl group, a cyclization reaction occurs, a six-membered ring is formed, and fluorescence quenching is caused. The HBA has the advantages of low detection limit, high selectivity and anti-interference, fast response speed, low cytotoxicity, excellent membrane permeability, can realize real-time fluorescent imaging of cells, and can be used for detecting H2S level in non-alcoholic fatty liver disease.

The invention discloses a low-light-level lens, which comprises a first lens group with positive focal power and a second lens group with positive focal power, and is characterized in that the first lens group comprises a first lens with negative focal power, a second lens with negative focal power and a third lens with positive focal power; the second lens group comprises a fourth lens with positive focal power, a fifth lens with negative focal power, a sixth lens with positive focal power, a seventh lens with positive focal power, an eighth lens with negative focal power and a ninth lens with positive focal power; the combined focal power of the fourth lens, the fifth lens and the sixth lens is phi 456, the combined focal power of the seventh lens, the eighth lens and the ninth lens is phi 789, and the focal power of the low-light-level lens is phi; wherein 0.245 < phi 456 / phi < = 0.425, and 0.245 < = phi 789 / phi < = 0.385. According to the technical scheme, the number of the lens groups, the number of the lenses, the focal power matching mode of the lens groups, the focal power matching mode of the lenses and specific values in the low-light-level lens are reasonably set, so that the design of the low-light-level lens with a large aperture can be realized.

The application discloses a soft tissue puncture path planning and monitoring method and system based on electrical impedance imaging. The method comprises the following steps: before puncture, multi-modal soft tissue information is acquired through multi-frequency domain electrical impedance imaging, ultrasonic imaging and nuclear magnetic resonance imaging; an image reconstruction model is established to fuse multi-modal information and improve imaging resolution; preoperative path planning modeling is performed to define state space and action space, and global and local reward functions are designed to optimize path strategy; in operation, a puncture needle front-end mechanical sensor is used to monitor path resistance in real time, and the path is dynamically adjusted; and the optimal route design is achieved through iterative training. The system comprises data acquisition, image reconstruction, route planning, intraoperative monitoring and abnormal alarm modules, can effectively reduce tissue damage rate and shorten operation time, and provides precise and intelligent technical support for minimally invasive interventional surgery.

This invention discloses a fluorine-nitrogen co-doped carbon dot, its preparation method, and its applications. The fluorine-nitrogen co-doped carbon dot is a nanoparticle constructed using a one-step hydrothermal synthesis method with fluorine-containing and nitrogen-containing precursors. The nanoparticle is spherical with a particle size of 5 nm, and its surface is rich in carboxyl, amino, and hydroxyl functional groups. Its fluorescence quantum yield is not less than 20%, and its emission wavelength is in the 500-550 nm range. It has the characteristic of targeting the H3K36me2 histone modification in tumor cell nuclei, and can achieve specific labeling of tumor cells within 5 minutes. The enrichment intensity in tumor tissue is more than 2.72 times that in normal tissue. The fluorine-nitrogen co-doped carbon dot of this invention is expected to serve as a novel fluorescent labeling probe for tumor identification and imaging, contributing to the early and accurate diagnosis of malignant tumors. It has multiple advantages such as speed, accuracy, safety, and visualization, and has broad application prospects in tumor pathology identification and intraoperative navigation.

An optical processing device adapted to parallel processing of multi-channel forward-looking radar signals is disclosed. This device preprocesses high-throughput radar signals in the analog domain by moving the highly complex steps in the radar imaging algorithm to the optical domain for instantaneous parallel computation. During the processing, the data volume is downsampled and extracted, which reduces the requirements of imaging on back-end electrical sampling and computation, thereby enabling high real-time radar forward-looking imaging.

The invention belongs to the field of semiconductor materials, and particularly discloses a low-pixel crosstalk photoelectric detector and a preparation method thereof, and the photoelectric detector comprises an IC substrate, an insulating layer, a metal layer, a hole transport layer, a quantum dot layer, a nanocrystalline protection layer, an electron transport layer and a second electrode layer. The insulating layer is located on the upper surface of the IC substrate, a hole obtained through photoetching extends into the IC substrate from the insulating layer, a tungsten column of the IC substrate is exposed, a Ti layer, an Au layer, a hole transport layer, a quantum dot layer, a nanocrystalline protection layer and an electron transport layer are sequentially arranged in the hole from bottom to top, one part of the electron transport layer is located above the hole, and the other part of the electron transport layer is located above the hole. And the second electrode layer is positioned on the surface formed by the electron transfer layer and the insulating layer. The whole photoelectric detector provided by the invention has the performance advantages of low dark current, high responsivity, excellent optical property and low pixel crosstalk.

The application discloses an organic quaternary phosphonium salt microcrystal flexible X-ray scintillation screen and a preparation method and application thereof, and belongs to the technical field of organic photoelectric functional materials. The organic radiation luminescent material is prepared from triphenylphosphine and iodomethane as raw materials through a quaternary phosphonium reaction to obtain methyltriphenylphosphonium iodide crystals, and then the methyltriphenylphosphonium iodide crystals are ground, sieved, compounded with a PVA aqueous solution and drop-coated and dried to obtain the flexible X-ray scintillation screen. The preparation method has the advantages of mild reaction conditions, simple synthesis, cheap raw materials and easy product purification, and provides a new idea for preparing an organic scintillator. The PVA aqueous solution is doped with methyltriphenylphosphonium iodide microcrystals to prepare the scintillation screen, the prepared scintillation screen has the advantages of bright radiation luminescence, high imaging resolution, low detection limit, bendability and curlability, and successfully realizes static, curved surface and dynamic X-ray imaging.

The application discloses a lanthanide-actinide heterometallic coordination polymer material and a preparation method and application thereof, and belongs to the technical field of metal organic polymer materials. 2+ The lanthanide-actinide heterometallic coordination polymer material is prepared through precise integration in a one-dimensional structure. The preparation method is simple in operation and easy to realize repeated preparation. The prepared lanthanide-actinide heterometallic coordination polymer material has both characteristic luminescence of lanthanide elements and structure guiding characteristics of actinide ions, is highly ordered in structure and has excellent radiation stability. Compared with other scintillators, the prepared lanthanide-actinide heterometallic coordination polymer material has sensitive scintillation response to X rays, high light output and excellent energy resolution, and has great potential in X ray imaging.