8 results about "Rectilinear Scan" patented technology

The application provides a splicing printing correction method, an electronic device and a medium. The splicing printing correction method comprises the following steps: controlling a first laser and a second laser to respectively scan along a first straight line in a splicing area to form a first scanning point and a second scanning point; establishing a coordinate system based on the splicing area, so that the first scanning point and the second scanning point are located in the coordinate system; obtaining a first coordinate value of the first scanning point and a second coordinate value of the second scanning point; detecting whether the first coordinate value and the second coordinate value satisfy a preset offset value, and obtaining a correction result between the first laser and the second laser according to the detection information. The application can quickly complete splicing correction, ensure the accuracy of debugging, and improve the printing accuracy and quality.

Embodiments of this application provide a linear scanning CT imaging system and imaging method. The linear scanning CT imaging system includes: a support frame; a transport device mounted on the support frame, the transport device including a drive mechanism, a transmission mechanism, and a circular transport path, the drive mechanism being configured to drive the transmission mechanism to move along the circular transport path, and multiple local linear paths in the circular transport path forming multiple linear scanning segments; at least one carrier mounted on the transmission mechanism, configured to carry at least one scanned object, the carrier being able to follow the transmission mechanism to move along the circular transport path to pass through multiple linear scanning segments; multiple scanning devices, respectively disposed in the multiple linear scanning segments, with multiple X-ray sources in the multiple linear scanning segments emitting multiple X-ray beams from multiple angles relative to the scanned object; and an imaging device for generating a computed tomographic image of the scanned object based on multiple projection data detected by various detectors in the multiple linear scanning segments.

The application provides a method and device for measuring lateral spatial resolution of a confocal Raman microscope, and relates to the field of optical measurement and microscopic spectroscopy technology. The method comprises the following steps: positioning a region of a straight edge on a single-layer graphene sample by using a confocal Raman microscope, wherein the single-layer graphene sample is prepared on a silicon oxide substrate; determining a straight scanning path and a scanning step in a direction perpendicular to the straight edge from a bare region of the substrate to a sample region in the region of the straight edge which has been positioned by using the confocal Raman microscope; determining a plurality of scanning points on the straight scanning path based on the scanning step in the process of moving the single-layer graphene sample, and collecting Raman spectrum signals of the scanning points; and measuring the lateral spatial resolution of the confocal Raman microscope based on the Raman spectrum of each scanning point. By using the method provided in the application, the accuracy of the lateral spatial resolution of the confocal Raman microscope can be improved.

Embodiments of the present application provide a linear scanning CT imaging system and an imaging method. The linear scanning CT imaging system comprises a plurality of support frames, a plurality of conveying devices respectively installed on the plurality of support frames, each conveying device comprising a driving mechanism, a transmission mechanism and an annular conveying path, the driving mechanism being configured to drive the transmission mechanism to move along the annular conveying path, the plurality of annular conveying paths forming a plurality of linear scanning sections through local linear paths, a plurality of bearing seats configured to carry at least one scanning object, a plurality of sets of scanning devices respectively arranged in the plurality of linear scanning sections, each set of scanning devices comprising at least one ray source and at least one detector, the ray source emitting a ray beam, and the detector detecting projection data formed after the ray beam passes through the scanning object, and an imaging device configured to generate a computed tomography image of the scanning object according to a plurality of projection data detected by each detector of the plurality of linear scanning sections.

Embodiments of the present application provide a linear scanning CT imaging system and an imaging method. The linear scanning CT imaging system comprises a first support frame and a second support frame, a first conveying device mounted on the first support frame, comprising a first driving mechanism, a first conveying mechanism and a first linear scanning section, the first driving mechanism driving the first conveying mechanism to move along the first linear scanning section, a second conveying device mounted on the second support frame, comprising a second driving mechanism, a second conveying mechanism and a second linear scanning section, the second driving mechanism driving the second conveying mechanism to move along the second linear scanning section, at least one bearing seat carrying at least one scanning object, capable of being driven by the first conveying mechanism or the second conveying mechanism to move, a plurality of sets of scanning devices, each set of scanning devices comprising at least one ray source and at least one detector, and an imaging device for generating a computed tomography image of the scanning object according to a plurality of projection data detected by each detector.

The present application relates to a kind of based on weighted source straight line scanning CT analytic reconstruction method, belong to micro focus computer tomography reconstruction technical field.The method includes: S1: the layout of F-mSTCT scanning mode is built;S2: in F-mSTCT scanning mode, design the weighting function for correcting redundant projection and truncated projection;S3: according to the weighting function constructed in step S2, construct W-FBP reconstruction algorithm suitable for F-mSTCT.The present application can solve the problem of truncation in STCT imaging, and overcome the shortcomings of poor imaging resolution of V-FBP algorithm under low projection number, realize the reconstruction of high-resolution image under lower ray source sampling rate, while reducing the number of projections.

This application provides a linear CT imaging system and scanning imaging method based on multiple linear scanning trajectories, relating to the fields of radiation imaging and non-destructive testing. The system includes: a transport device for moving the scanned object along a predetermined m-segment linear scanning trajectory, wherein at least two segments of the m-segment linear scanning trajectory intersect and form a first preset angle, where m is a positive integer greater than or equal to 2; n scanning segments, each including at least one X-ray source and at least one detector, the n scanning segments being arranged at intervals along the m-segment linear scanning trajectories, where n is a positive integer greater than or equal to m; wherein, on both sides of each linear scanning trajectory, at least one X-ray source and detector for that scanning segment are respectively arranged, the X-ray source emitting a X-ray beam, and the detector detecting the X-ray beam emitted by the X-ray source and passing through the scanned object. This application enables the detection of large-volume or structurally heterogeneous scanned objects.

The utility model relates to photoelectric signal transmission and detection technical field, concretely relates to a large aperture optical coaxial linear scanning machine -borne laser sounding radar device, including laser emission scanning module, light collection module and optical signal acquisition module, the laser emission scanning module according to beam transfer path includes laser, galvanometer and reflector in proper order, the light collection module according to beam transfer path includes concave mirror, plano -convex lens and convex lens in proper order, the optical signal acquisition module includes polarization module, filter and detector, the utility model discloses can significantly improve the scanning speed of system and the ability of detecting weak signal through galvanometer scanning and cassegrain telescope design, effectively suppresses water surface echo intensity, promotes the characteristic intensity of water bottom echo signal, and the application range is wider.