18 results about "Guide star" patented technology

A celestial exploration support program is disclosed. The program can execute, on a computing device, a hopping-path providing function that generates and provides to a user a hopping-path image in which hopping information including a hopping direction and an angular distance from a guiding star to a specific celestial object is reflected on a basic star chart image.

The utility model relates to an integrated astronomical camera which comprises a first imaging CMOS, a second imaging CMOS, a filter disc and a reflector, the first imaging CMOS is located behind the filter disc and used for receiving filtered light rays for imaging, and the second imaging CMOS receives unfiltered light rays through the reflector to achieve a star guiding function; meanwhile, a focusing mechanism is arranged to adjust the position of the second imaging CMOS to achieve the confocal purpose, and multiple types of optical filters such as narrow-band filters are integrated to improve the observation performance under the weak light source condition. According to the invention, the effects of optimizing the space utilization efficiency, improving the imaging precision and enhancing the target tracking capability in a weak light environment are achieved.

The invention discloses a wavefront dot matrix image generation method based on a laser guide star, an optical system and a storage medium, and the method comprises the steps: collecting a laser guide star wavefront dot matrix image with photon noise and distortion interference, and recovering the image into an ideal laser guide star wavefront dot matrix image through maximum likelihood estimation; constructing a wavefront dot matrix image generation model based on a U-shaped neural network; the collected laser guide star wavefront dot matrix image with photon noise and distortion interference is used as training input of a wavefront dot matrix image generation model, the corresponding ideal laser guide star wavefront dot matrix image is used as a training label of the wavefront dot matrix image generation model, and the wavefront dot matrix image generation model is trained; and obtaining a laser guide star wavefront dot matrix image with photon noise and distortion interference, inputting the laser guide star wavefront dot matrix image into the trained wavefront dot matrix image generation model, and generating the laser guide star wavefront dot matrix image without photon noise and distortion interference, thereby improving the correction capability of the optical system.

The invention discloses a multi-region time-sharing exposure control method for a single-chip image sensor and an application of the multi-region time-sharing exposure control method. The control method comprises the following steps of: logically partitioning a pixel array of a single-chip image sensor according to a shooting scene to obtain a plurality of exposure areas; according to the exposure time of different partitions, a pixel row decoder is controlled to expose the area needing to be exposed; after exposure is completed, the column reading circuit is controlled to read out, and exposure images of all the partitions at different moments and different exposure times are obtained. The method is used in the star guiding process. According to the method, multi-region time-sharing exposure of the single image sensor is realized, and meanwhile, the multi-region time-sharing exposure is applied to the astronomical field, so that a guided star image is acquired and a target image is shot on the same image sensor, the error is smaller when the guide star deviation is calculated, and more accurate guide star correction can be completed. The complex process problem of adjusting the guide star sensor and the main sensor to be in the same plane and the guide star calculation error caused by the adjustment error are avoided.

The invention provides imaging equipment. The imaging equipment comprises a shell, a long-focus imaging assembly, a guide star imaging assembly, a wide-angle imaging assembly and an adjusting mechanism, the long-focus imaging assembly is provided with a first image acquisition end, the guide star imaging assembly is provided with a second image acquisition end, and the wide-angle imaging assembly is provided with a third image acquisition end; a mounting space is formed in the shell; the long-focus imaging assembly, the wide-angle imaging assembly and the adjusting mechanism are arranged in the mounting space; the guide star imaging assembly is connected with the long-focus imaging assembly; the driving end of the adjusting mechanism is connected with the shell and is used for driving the shell to rotate in at least two degrees of freedom; the focal length of the first image acquisition end is greater than that of the second image acquisition end and greater than that of the third image acquisition end. According to the imaging equipment, the long-focus imaging assembly, the guide star imaging assembly and the wide-angle imaging assembly are integrated in the same imaging equipment, so that the problem that the existing imaging equipment is difficult to consider long-distance shooting, viewing shooting and better imaging quality at the same time is solved.

The invention provides a control method of imaging equipment, the imaging equipment and a computer program product. The method comprises the following steps: acquiring an initial image of an equipment body in a current pose by a long-focus imaging module or a guide star imaging module; the initial image is analyzed by the long-focus imaging module or the guide star imaging module, and the current pointing coordinate of the equipment body is determined; and determining the target coordinate of the to-be-observed target, and controlling the adjusting mechanism to drive the equipment body to point to the to-be-observed target based on the deviation between the target coordinate and the current pointing coordinate. According to the method, the long-focus imaging module, the guide star imaging module and the wide-angle imaging module are integrated, so that multiple scene requirements can be met by only one imaging device.

The present disclosure is a method for positioning the light tip of an infrared star guide camera of a 1064nm laser ranging system, and relates to the technical field of space debris laser ranging. The method comprises: performing multi-stage preprocessing on the 1064nm laser beam image collected by the infrared star guide camera; extracting the laser beam profile from the preprocessed image; constructing two types of structural feature lines based on the profile extraction result, and determining the intersection of the two types of structural feature lines as the light tip positioning point. The present disclosure effectively solves the positioning problem caused by strong noise and beam dispersion of the infrared star guide camera, has high positioning accuracy and strong stability, is suitable for complex observation scenes of the 1064nm laser ranging system, significantly improves the reliability of laser debris ranging, and provides key technical support for space debris orbit monitoring.

The present application relates to the technical field of photoelectric detection, and provides a kind of ground-based photoelectric telescope full-automatic star calibration method, comprising: in the corresponding star map of current time, construct the star list for calibration;Iterate the star in the star list, based on the currently guided star, whether the deviation of the current azimuth and the real-time position of the current elevation of telescope is within the first threshold with the position of the star guided in current time;When within the first threshold, the centroid position of the currently guided star is acquired by image acquisition system, and the miss distance of the currently guided star is determined based on the centroid position;Telescope control system calculates miss distance variance based on the miss distance, and judges whether the miss distance variance is within the second threshold;When the miss distance variance is within the second threshold, the calibration data of the guided star is saved, and moves to the next star for automatic calibration, until all the stars in the star list are traversed.

Herein is presented a method for the adaptive correction of images comprises the steps: (a) capturing a first image with an image capture device; (b) selecting within the first image at least one candidate point and at least two test points; (c) using an iterative phase retrieval algorithm to calculate for each of the at least one candidate points an initial aberration correction for the entire image as if each of said at least one candidate points were guiding stars; (d) comparing the aberrations of each of the at least two test points in each of the initial aberrations corrections; (e) selecting the one candidate point whose initial aberration correction yields suitably similar aberrations for each of the at least two test points and designating said candidate point as a virtual guiding star; and (f) calculating phase corrections for the initial aberrations according to said virtual guiding star.

The utility model discloses an off-axis star guider, an astronomical telescope star guiding assembly and an astronomical telescope. The off-axis star guider comprises a connecting main body, a focusing device and a light path coupler, the focusing device is fixedly connected with the connecting main body, the light path coupler is movably matched with the connecting main body and the focusing device, the light path coupler is provided with a first connecting structure, and the first connecting structure is used for being detachably connected with a star guide camera. According to the astronomical telescope guide star assembly provided by the embodiment of the utility model, the focusing device is used as a part of the off-axis guide star device, can be used for focusing a guide star camera and can also be used for accurately adjusting the position of the prism or the reflector, and when the focusing device is used for adjusting the position of the prism or the reflector, the focusing effect is good. The off-axis star guider can be operated without being detached from a telescope and other equipment, other extra tools are not needed, the off-axis star guider is convenient to use, and the position of a prism or a reflector can be accurately known.

The invention discloses a guide star data-based rack residual error adaptive pointing correction method and system, which are applied to a telescope with a height axis and an azimuth axis. The method comprises the following steps: establishing and initializing a rack model; guide star data acquisition and mass filtering; the sky grid coverage degree is judged; judging a sample number threshold value and removing abnormal samples; carrying out residual feature construction based on rack item contribution and meteorological features; training a rack residual regression model; performing new and old model effect comparison and online updating; and correcting the pointing error on line. Under the condition that extra calibration overhead is not increased, automatic updating of the pointing model is achieved through daily guide star data, the pointing precision and stability under the complex weather and long-term drift condition are improved, the manual calibration burden is relieved, and the method is suitable for a high-automation telescope long-term operation scene.

The invention discloses an astronomical telescope off-axis star guiding device with a focus reducer. The astronomical telescope off-axis star guiding device comprises a telescope, a reflector, a main detector system, a focus reducing lens group, a star guiding detector and the like. The off-axis large-view-field star guide of the telescope is realized, the star guide system shares the main light path of the telescope, the light collecting capability and the stability are higher than those of an external star guide mirror, and the focus compressor device improves the star guide detection view field and is beneficial to finding a proper reference star. The invention also discloses a method for calculating the offset of the guide star, the guide star transmits an image shot in a certain period of time to a program for processing, and the program calculates the WCS coordinate (world coordinate system) of the image in a star map matching manner, so as to extract right ascension and declination information of an image reference point. And the offset of the central point is obtained through comparison with historical data and is fed back to a telescope motion system for correction, so that long-time high-precision observation of the target celestial body is realized.

This invention discloses a computationally adaptive aberration correction imaging method for deep tissue based on upconversion nanoparticle guide stars. A near-infrared fluorescence imaging system is constructed using rare-earth upconversion nanoparticles as guide stars. Fluorescence distortion images of deep tissue samples are acquired through near-infrared excitation, and imaging aberrations are parameterized based on Zernike polynomials. Aberration coefficients are reconstructed using a deep learning model incorporating physical prior constraints. Digital wavefront compensation is performed based on the reconstructed aberration information to achieve deep tissue aberration correction and obtain high-resolution imaging results. This invention eliminates the need for complex optical hardware such as wavefront sensors or deformable mirrors, and can stably achieve aberration estimation and compensation even in 360 μm deep tissue conditions. Compared with traditional aberration correction methods, the correction effect is improved by more than 30%, enabling rapid image correction and high-precision positioning. It solves the problems of weak guide star signals, low aberration correction efficiency, and high system cost in deep tissue imaging, and is applicable to deep tissue optical imaging in fields such as clinical diagnosis, biological cell observation, and drug development.

The invention discloses a microwave laser hybrid servo control method and system for satellite-ground communication. The method comprises the steps of generating an initial pointing instruction in an initial mode; starting a microwave communication link and entering a microwave dominant mode, and in the microwave dominant mode, generating a first control instruction according to the microwave signal; if the laser guide star data meets the laser capture condition, a laser communication link is started, and a laser communication quality index of the laser communication link is monitored; if the laser communication quality index is in a preset credible range, entering a laser dominant mode; in the laser dominant mode, a second control instruction is generated according to the laser guide star data; and if the laser communication quality index of the laser communication link in the laser dominant mode is in a failure range, entering a microwave dominant mode. And the common server controls the direction of the microwave laser integrated common aperture antenna according to the corresponding instruction. According to the scheme, fusion control is carried out on a laser communication link and a microwave communication link, and efficient and high-precision tracking of a target is realized through multi-stage and multi-mode control.

The application discloses an atmospheric coherence length measurement self-adaptive pointing tracking method and system, belongs to the technical field of atmospheric optical measurement instruments, and solves the technical problems of low recognition and alignment efficiency, weak self-adaptive adaptation capability, insufficient anti-interference performance and poor system cooperation in the prior art. A star camera is used to collect a starry sky area image of a target star area; after the image is analyzed and a celestial body measurement parameter is obtained, a turntable is finely adjusted so that the target star is on a target surface of a main mirror camera; exposure time and gain of the main mirror camera are adjusted; two light spots of the target star are automatically adjusted to be centered on a field center of the main mirror camera; a target star image is collected; an atmospheric coherence length value is calculated in real time; whether the atmospheric coherence length value is empty or an abnormal value is determined at a fixed interval; if yes, the turntable automatically points to a next target star; and if not, an atmospheric coherence length measurement task is continuously executed. The application is used for realizing fast alignment and stable tracking of a beacon light source in a weak light environment at night.

The invention relates to a guide star sensor image processing method, a guide star sensor image processing system and a guide star processing board hardware framework. The guide star sensor image processing method comprises the following steps: confirming a working mode of a guide star sensor; performing calibration image processing or star point extraction processing according to the working mode of the guide star sensor, and if the working mode is not imaging, performing calibration image processing to obtain a background field correction image, a dark field correction image and a flat field correction image; if the working mode is imaging, performing calibration image correction on the imaging image by using the background field correction image, the dark field correction image and the flat field correction image to obtain a first star map; wherein if the imaged image is a first frame of full-image image, star point extraction processing is carried out subsequently, and star point information is obtained; if the imaging image is a second frame of full-image image, star point extraction, star point screening and star point matching are carried out subsequently; and if the imaging image is a windowing image, star point extraction and star point matching are carried out subsequently.

The invention discloses an adaptive directional tracking method and system for atmospheric coherent length measurement, belongs to the technical field of atmospheric optical measurement instruments, and solves the technical problems of low recognition and alignment efficiency, weak adaptive capability, insufficient anti-interference performance and poor system collaboration in the prior art. Collecting a starry sky area image of the target fixed star area by using a star guide camera; analyzing the image to obtain a celestial body measurement parameter, then finely adjusting the rotary table to enable the target star to be on the target surface of the primary mirror camera, adjusting the exposure time and gain of the primary mirror camera, and automatically adjusting two light spots of the target star to be centered at the view field center of the primary mirror camera; collecting a target fixed star image, and calculating an atmospheric coherence length value in real time; and judging whether null values and abnormal values appear in the atmospheric coherence length numerical values at fixed time intervals, if so, automatically pointing to the next target fixed star by the turntable, and if not, continuing to execute the atmospheric coherence length measurement task. The method is used for realizing rapid alignment and stable tracking of the beacon light source in the night weak light environment.

The invention discloses a modularized ASCOM control system of an atmospheric coherent length measuring instrument. The modularized ASCOM control system comprises a guide star camera supporting an ASCOM protocol, a primary mirror camera and an electric focalizer, a turntable system; the rotary table system controls an azimuth angle and a pitch angle through an Onstep controller and is driven by a motor controller to execute; the Onstep controller has the functions of pointing and tracking, obtains target information based on upper computer software, calculates a target azimuth angle and a target pitch angle, converts the target azimuth angle and the target pitch angle into motor control instructions and outputs the motor control instructions to the motor controller, and the motor controller controls a motor to drive the rotary table system to rotate; upper computer software; and the upper computer software communicates with the turntable system, the guide star camera, the primary mirror camera and the electric focalizer through an ASCOM protocol and performs flow control of atmospheric coherent length measurement. The system has the characteristics of modularization, high compatibility and the like, can directly replace similar ASCOM equipment without modifying software, remarkably reduces the development cycle and maintenance cost of the system, and is suitable for various atmospheric turbulence monitoring scenes.