10results about How to "Improve imaging resolution" patented technology

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.

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.

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.

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 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.

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 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.

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.