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

The point spread function determines the imaging properties of the optical system, and different point spread functions can achieve different imaging results. By introducing the Fermat helix into the Greek ladder photon sieve, the Fermat helix modulates the distribution positions of the sieve holes in the Greek ladder photon sieve to obtain the Fermat helix Greek ladder photon sieve. Through the imaging optical path based on the Fermat spiral Greek ladder photon sieve to generate multiple focal points in the axial direction, the function of different point spread functions of the multi-focal plane of a single device is realized, including anisotropic Airy disk and vortex focus, which can be applied to coherence Focusing and imaging from X-ray to terahertz band in light field. The first and third focuses are anisotropic Airy disks, which can achieve different resolutions in different directions for the input object, which helps to improve the resolution of the object's interested direction; the second focus is the vortex focus, The vortex focus can be used for optical trapping. In addition, when used for imaging, the radial Hilbert transform can be realized based on the helical phase filter, and the edge enhancement of the amplitude and phase objects can be realized.

The invention relates to a target azimuth imaging method based on superposition vortex light. Based on the rotation modulation, the rotating superposition state vortex light with different time-varying phase differences is generated to irradiate the target, and the rotating Doppler effect is generated. The target echo signal is Fourier transformed to obtain the time-frequency signal. Using the rotating Doppler frequency shift signal and The space-time inversion relationship of the intensity helix spectrum is used to obtain the intensity helix spectrum of the vortex light in the rotating superposition state. At the same time, the time spectrum analysis is performed on the echo signals of the vortex light in the rotating superposition state with different time-varying phase differences, and the phase of the vortex light in the rotating superposition state is obtained. Helix spectrum; finally, through the superposition of the intensity helix spectrum and the phase helix spectrum of the rotation superposition vortex light, the azimuth imaging of the target is realized through reconstruction. The method of the invention has higher imaging resolution under the forward-looking / staring imaging condition, and realizes imaging "not dependent on motion, benefiting from motion".

The invention discloses a method for synthesizing a rare earth metal compound nano cluster and application of the rare earth metal compound nano cluster in the aspects of target imaging of diseased regions such as tumor and contrast medium preparation. The rare earth metal compound nano cluster prepared by the method has a small particle size, good permeability, high fluorescent stability, high sensibility and strong targeting, so that the tumor can be accurately positioned; the rare earth metal compound nano cluster is directly synthesized by biological tumor cells and has good biocompatibility; and the method is convenient to operate and intuitive in result, synchronous analysis and detection in multiple states and multiple modes can be carried out, and the method has a wide medical application prospect.

The invention discloses a multi-scale matrix encoding method, comprising the following steps: inputting an initial encoding matrix of the same size as an image; dividing the initial encoding matrix into a first-level scale matrix to obtain multiple first-level scale matrices; The first-level scale matrix is ​​divided into multiple second-level scale matrices, and the second-level scale matrix is ​​locally encoded; the first-level scale matrix is ​​globally encoded on the basis of local encoding. The present invention is based on the block-based compressed sensing technology, further divides the blocks, and according to the dependencies between pixels, can design a coding matrix that obtains more information about the block. Compared with the existing coding matrix, the structure is better.

The invention discloses a lightweight zooming telescope, comprising: a drive control device, a driver, a circular reflective film on the incident surface of an objective lens, a circular reflective film on the exit surface of the objective lens, a circular reflective film on the incident surface of the eyepiece, and a circular reflective film on the exit surface of the eyepiece film, zoom surface Ⅰ, zoom surface Ⅱ, zoom surface Ⅲ, zoom surface Ⅳ, medium Ⅰ and medium Ⅱ; the technical point of this invention is: the curvature of the zoom surface used in the system can be changed when the drive device is working, not only can realize the The high-resolution imaging of long-distance objects can also continuously zoom to quickly identify the tiny details of the object; the present invention adopts a catadioptric hybrid structure, and the zoom surface is coated with a reflective film. When light is incident on the lens, the reflection on the zoom surface of the lens The film makes the light path reflect multiple times in the lens, which reduces the radial size of the telescope. Compared with traditional telescopes, the system is more compact and lightweight, filling the vacancy of zoom glasses in terms of telephoto.

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.