49results about How to "Enable high-resolution imaging" patented technology

The invention relates to a line scanning confocal imaging image guidance-based self-adaption confocal scanning retina imaging method and device. By adopting the method, on the basis that one-dimensional scanning is performed on fundus retinae by a line scanning confocal imaging unit to obtain large-visual field imaging of the retinae, local small region positions of the retinae can be randomly selected and are marked from large-visual field imaged images, and a self-adaption confocal scanning retina imaging unit can be used for realizing accurate positioning on the small regions of the retinae and performing high-resolution imaging on the small regions. According to the line scanning confocal imaging image guidance-based self-adaption confocal scanning retina imaging method and device, the large-visual field imaging of the line scanning confocal fundus retinae and the accurate high-resolution imaging of the small region positions of the self-adaption confocal scanning fundus retinae can be obtained at the same time. Under the image guidance of the fundus retinae large-visual field imaging acquired by the line scanning confocal imaging unit, the accurate positioning can be realized on the local small regions by the self-adaption confocal scanning retinae imaging unit, and meanwhile, the high-resolution imaging is realized on the small region positions.

The invention provides a method for improving the resolution of linear-array three-dimensional imaging synthetic aperture radars. The method adopts two linear-array three-dimensional imaging syntheticaperture radars with orthogonal motion tracks for imaging of the same region, and then blends two acquired images by discrete wavelet transform technology so as to obtain a linear-array three-dimensional imaging synthetic aperture radar image with high resolution. The invention has the following advantages of realizing high-resolution imaging of the linear-array three-dimensional imaging synthetic aperture radars by using a relatively short array antenna and solving the problem of relatively low tangential track resolution of images acquired by the linear-array three-dimensional imaging synthetic aperture radars. The method can be widely applied in the fields such as synthetic aperture radar imaging, earth remote sensing and geological mapping.

The invention discloses a high-orbit sub-aperture ISAR imaging method for a ship target, and aims at solving the problems of image defocusing and difficulty in improving the resolution due to the factthat a ship moves in long synthetic aperture time, as long as hundreds of thousands of seconds, required by high resolution imaging of a high-orbit satellite with a high orbit but relatively low running speed. On one hand, the sub-aperture synthetic aperture time is short, and influence of ship motion on imaging is reduced, and on the other hand, the rotation angle generated by ship swing is alsobeneficial to realizing high-resolution ISAR imaging. Traditional understanding that ship motion is regarded as a motion error is broken through, high-resolution ISAR imaging is carried out by utilizing the ship motion, the problem of contradiction between high-orbit long synthetic aperture time and the ship motion is solved, and the method can be applied to the fields of high-orbit ship target detection, identification and imaging.

The invention provides a method for merging resolutions of linear array three-dimensional imaging synthetic aperture radars. The method adopts two linear array three-dimensional imaging synthetic aperture radars of which the motion trails are orthogonal to image the same region and then adopts an orthogonal spatial projection matrix technology to merge two obtained images, thereby generating a high-resolution linear array three-dimensional imaging synthetic aperture radar image. The method solves the problem that the cross track resolution of the linear array three-dimensional imaging synthetic aperture radar image is lower than the long track resolution of the linear array three-dimensional imaging synthetic aperture radar image. The method has the advantages of realizing the linear array three-dimensional imaging synthetic aperture radar high-resolution imaging by using a short array antenna and can be used in the fields of synthetic aperture radar imaging, earth remote sensing and the like.

The invention relates to an onboard inverse synthetic aperture laser radar micro-motion imaging method under sparse sampling. The method comprises the following steps: specific to a micro-motion target in the air, building a target motion model, and obtaining a slant-range expression of any point on the target; obtaining a laser radar echo signal model; by estimating a radial speed of the target,constructing a compensation function, and performing radial speed compensation on an echo signal; expressing a fast time domain and a slow time domain in a discretization manner, and dividing a distance direction-azimuth imaging space into N*M grids; specific to the divided distance direction-azimuth imaging space, building an onboard inverse synthetic aperature laser radar micro-motion imaging linear measurement model; and by utilizing a compressive sensing theory, establishing an optimization equation based on an l1/2 norm optimization criterion, and solving, thus obtaining an image reconstruction result under the sparse sampling. The method provided by the invention is specific to laser radar detection and can realize high-resolution imaging on the target at a high sparse sampling rate,the azimuth data rate requirement is effectively lowered, and the laser radar imaging quality is improved.

The invention relates to a method for imaging a space target by an on-orbit SAR satellite, which fully considers the high-speed relative motion characteristics of the on-orbit SAR satellite and the space target to be imaged and the system limitation, and combines STK software to solve the problems that the relative motion of the SAR satellite and the space target is complex, the geometrical relationship is difficult to determine and the imaging parameter precision requirement is high in the space target imaging process. By selecting a proper pulse repetition frequency, effective reception of the echo of the space target to be imaged is ensured, and interference of emission pulse, sub-satellite point echo, ground scene echo and the like is avoided at the same time. Through the mode of combining satellite attitude maneuver and antenna electric scanning, the beam pointing required by the SAR satellite for space target imaging is realized, the implementation cost and complexity are reduced, and the application range of the on-orbit SAR satellite is expanded.

The invention discloses a microwave staring correlated imaging random radiation array element spatial arrangement optimization method. The method includes acquiring the random radiation array area and the minimum distances, diameters and numbers of the array elements; performing optimization by adopting the rule of array element arrangement entropy maximization by the genetic algorithm, and acquiring the maximum arrangement manner of the array element arrangement entropy. By the aid of the method, the randomness of the radiation field can be improved, and the high-resolution imaging is implemented.

The invention discloses a multi-scale matrix coding method. The multi-scale matrix coding method comprises the following steps: inputting an initial coding matrix in the same size as an image, performing first-stage scale division on the initial matrix to obtain a plurality of first-stage scale matrixes, performing second-stage scale division on the first-stage matrixes to obtain a plurality of second-stage scale matrixes, performing local coding on the second-stage scale matrixes, and performing global coding on the first-stage scale matrixes on the basis of the local coding. Based on a block segmentation compressed sensing technology, the further division is performed on the basis of a segmented block, the coding matrixes obtaining more information of the segmented block can be designed according to dependencies between pixels, and, compared with an existing coding matrix, the coding matrix provided in the invention has the better reconstruction effect.

The invention relates to a large-aperture large-target-surface high-resolution half-group compensation focusing lens and a working method thereof. An optical system of the lens comprises a fixed groupA, a diaphragm 7 and a compensation group B which are sequentially arranged from front to back along an incident light path, wherein the fixed group A comprises a positive meniscus lens (1), a negative meniscus lens (2), a biconcave lens (3), a first gluing group formed by tightly gluing a positive meniscus lens (4) and a negative meniscus lens (5), and a positive meniscus lens (6); and the compensation group B comprises a biconvex lens (32), a second gluing group formed by tightly gluing the biconvex lens (33) and the biconcave lens (34), a third gluing group formed by tightly gluing a biconvex lens (35) and a negative meniscus lens (36), and a biconvex lens (37). The lens realizes the characteristics of large light transmission, large target surface and high resolution of the optical system, and adopts a half-group compensation mode for focusing, i.e., the focusing is completed by adjusting the compensation group B to move back and forth in the optical axis direction, thereby realizing close-range detection high-resolution imaging.

The invention relates to a large-scene high-resolution imaging method and device based on block imaging. The method comprises the following steps of: segmenting an imaging area into corresponding sub-imaging areas according to an effective imaging range of a PFA, refocusing echo signals corresponding to the sub-imaging areas to the central positions of the sub-imaging areas, obtaining refocused echo signals corresponding to the sub-imaging regions in a distance Doppler domain, sequentially carrying out lOSPI interpolation, two-dimensional IFFT and image distortion correction interpolation operation on the refocused echo signals to obtain sub-block images corresponding to the sub-imaging areas, and splicing the sub-block images to obtain corresponding large-scene high-resolution image data. The block imaging algorithm provided by the invention solves the problem that the focusing depth of a traditional PFA algorithm is small, does not depend on a radar track, solves the defects that the calculation amount is large and the operation time is long in the traditional block imaging algorithm, and can achieve high-resolution imaging of a large scene.

The invention discloses a cell fusion photoelectric sensor and a working method of an imaging system of the cell fusion photoelectric sensor. The manufacturing method of the cell fusion photoelectricsensor comprises the following steps: rhodopsin channel protein (ChR2) extracted from a chlamydomonas reinhardtii cell eye spot is transfected into a human embryonic kidney 293 (Hek293) cell; finally,the expression of the ChR2 plasmid in the cell is observed through a fluorescence microscope, and the cell expression result is further verified through photostimulation by using a patch clamp technology; the Hek293 cell expressing ChR2 is used as a sensitive material of a photoelectric sensor, optical signals absorbed by a device are converted into an ionic current by the Hek293 cell, and a patch clamp technology is used as a signal acquisition and processing unit of the photoelectric sensor; and the cell is combined with patch clamp detection equipment to form the cell fusion photoelectricsensor. The biological fusion photoelectric device has the beneficial effects that the biological fusion photoelectric device can fully utilize the advantages of organisms in light perception or vision, so that a novel device with better performance than a pure artificial device is generated.

The invention provides a high-resolution imaging camera for large-F-number diffraction real-time correction based on pixel coding. The high-resolution imaging camera solves the problem that an existing traditional imaging camera needs to adopt a long focal length and a large aperture to achieve high-resolution imaging. The high-resolution imaging camera comprises an imaging lens, a detector and a data processing module, the imaging lens is a large-F-number and large-Q-value imaging lens and is used for collecting imaging light of a measured target; the detector is a low-noise detector and is used for converting the imaging light acquired by the imaging lens into an image; the data processing module comprises a computer program, a pixel coding algorithm is realized when the computer program is executed, and diffraction real-time correction is performed by using the pixel coding algorithm to obtain a high-resolution image; the large-F-number imaging camera is small in aperture, the equivalent Nyquist MTF is low (the F number is 25, and the MTF is about 0.02), the resolution is improved by introducing a pixel coding algorithm, and the large-F-number imaging camera has the advantages of being small in aperture, long in focal length, high in resolution, light in weight, high in image quality and the like.

The invention provides an optical fiber probe and a variable-focus optical fiber OCT device based on an adjustable mode field area. The OCT device comprises a broadband light source, a laser light source, a first coupler, a reference arm light path structure, a sample arm light path structure and a spectral analysis component; the source light beam is divided into a first light beam and a second light beam by a coupler I; the sample arm light path structure adopts an optical fiber probe as a sample arm; the first light beam enters the reference arm light path structure, and the second light beam is coupled with pump light emitted by the laser light source and enters an optical fiber probe of the sample arm light path structure, so that the focus of the optical fiber OCT device is adjustable; and the spectral analysis component is used for receiving and analyzing the first light beam reflected back from the reference arm light path structure and the second light beam reflected back fromthe sample arm light path structure. The variable-focus optical fiber OCT device adopts an all-fiber probe structure as a sample arm, is small and exquisite, is easy to package, and has the characteristic of adjustable focus; and meanwhile, the variable-focus optical fiber OCT device can be used for endoscopy, and achieves high-resolution imaging beyond the depth-of-field range.

The invention discloses light-weight zoom telescopic glasses, which comprise a driving control device, a driver, an objective lens incident surface circular reflecting film, an objective lens emergentsurface annular reflecting film, an eyepiece incident surface annular reflecting film, an eyepiece emergent surface circular reflecting film, a zoom surface I, a zoom surface II, a zoom surface III,a zoom surface IV, a medium I and a medium II. The technical key points of the invention are as follows: the curvature of the zoom surfaces used by the system can be changed when a driving device works, so that high-resolution imaging of a long-distance object can be realized, and tiny details of the object can be quickly identified through continuous zooming; a catadioptric hybrid structure is adopted, the zoom surfaces are plated with the reflecting films, when light enters the lens, the reflecting films on the zoom surfaces of the lens enable a light path to be reflected for multiple timesin the lens, so that the radial size of the telescope is reduced; and compared with a traditional telescope, the light-weight zoom telescopic glasses are more compact and lighter, and the vacancy of zoom glasses in the aspect of telescoping is filled up.