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147results about How to "Improve scan quality" patented technology

Three-dimensional laser scanning device with adjustable visual field and area resolution

The invention discloses a three-dimensional laser scanning device with adjustable visual field and area resolution. The three-dimensional laser scanning device comprises a two-dimensional laser scanner, a scanner fixing bracket, a U-shaped rotating frame, a sliding block, an L-shaped bracket, a piston rod, a hinge, a motor and a motor rotating arm. The two-dimensional laser scanner is mounted on the scanner fixing bracket and the U-shaped rotating frame. The bottom of the scanner fixing bracket is connected with a rotating shaft of the motor through the piston rod, and the hinge and the motor rotating arm, so that an included angle is formed by a scanning plane and the horizontal plane of the two-dimensional laser scanner, and the two-dimensional laser scanner linearly rotates around the rotating shaft of the motor under the drive of the motor. With the adoption of the manner, the maximum value and the minimum value of the scanning resolution cannot be limited within a certain area at a position in the view field. The resolutions of a horizontal component and a vertical component in the view field are adjusted simultaneously by adjusting a rotating speed of an additional motor. Furthermore, even if the motor rotates at a constant speed without controlling the rotating speed of the motor, the view field angle and the resolution are adjusted by adjusting the height of the sliding block.
Owner:ZHEJIANG UNIV +1

System and method for terahertz quick tomography

The invention relates to the technical field of medical imaging and public safety, in particular to a system and method for terahertz quick tomography. The system comprises a laser transmitting system, a transmission light path and a control system of the transmission light path, an objective table, an arc-shaped light guide antenna array, a terahertz detection array, a data collecting transmission system and a computer processing system. Due to the fact that a rotating laser beam is adopted to excite the arc-shaped light guide antenna array, a terahertz source does not need to perform mechanical motion in the imaging process. In addition, due to the fact that the terahertz source covers the range of the whole objective table, the objective table does not need to move either, and the emission source and the objective table are static in the imaging process. The terahertz emitting source is static in the imaging process, the objective table is also static, too many introduced mechanical errors are avoided, and scanning quality is improved.
Owner:TSINGHUA UNIV +1

Novel 3D printing laser scanning method

ActiveCN107116216ASuppress anisotropyUniform laser scan qualityAdditive manufacturing apparatusIncreasing energy efficiencyGeometric propertyGraphics
The invention provides a novel 3D printing laser scanning method. The method comprises the following steps: setting the width between every two adjacent parallel lines in a parallel line set, and setting an included angle between the parallel line set and a central axis of a second-dimensional coordinate plane according to the shape of a section and based on the target of dividing the section into similar areas as many as possible; dividing the section into a plurality of unit graphics through a plurality of parallel lines; and setting a scanning line direction according to the property of laser forming powder, and then planning to obtain a scanning path of each unit graphic. The method has the advantages that each section is divided into the plurality of unit graphics of which the geometric properties are as similar as possible, and each unit graphic is treated as a scanning area, so that the laser scanning quality is uniform, and the anisotropy of the whole part can be inhibited; and random and incremental line width variation modes are set for the section of each layer, so that the fixation properties of combined surfaces of areas can be avoided during the layered overlapping process, and as a result, the risk caused by cracks can be reduced.
Owner:黑龙江多维时空自由制造有限公司

Book scanner capable of adjusting forward leaning angle of scanning platform

The invention discloses a book scanner capable of adjusting a forward leaning angle of a scanning platform. The scanner comprises a frame, an operating panel, a group of scanning unit assemblies, a scanning data support assembly, a computer host and a power supply supplied to work of the scanner. The scanner is characterized in that: the frame comprises an upper scanning platform stand and a base stand; the group of scanning unit assemblies and the scanning data support assembly are arranged in the upper scanning platform stand, and each scanning unit assembly in the group of scanning unit assemblies faces the scanning data support assembly; the computer host and the power supply are arranged in the upper scanning platform stand or the base stand; and the front sides or the rear sides of the upper scanning platform stand and the base stand are in articulated connection, and a leaning angle supporting and controlling component for controlling and supporting the forward leaning angle of the upper scanning platform stand is arranged between the rear sides or the front sides of the upper scanning platform stand and the base stand. According to the scanner, an operator can freely adjust the most appropriate position per se and work on scanning under a comfortable condition, and the fatigue degree is reduced.
Owner:王震

Straddle type monorail image modeling rail inspection vehicle and inspection method

The invention relates to a straddle type monorail image modeling rail inspection vehicle and an inspection method. The image modeling rail inspection vehicle comprises a trolley, digital cameras, an RTK device and scanners. The trolley is movably spanned on a track beam, and a moving station of the RTK device is fixed at a top of the trolley. Two outer sides of the trolley, corresponding to the track beam, are provided with a first support respectively, and a second support is horizontally arranged correspondingly to an upper portion of the track beam. The several digital cameras are arrangedon the first support along a vertical direction, and the several digital cameras are arranged on the second support along a horizontal direction. The scanners are arranged on the two first supports. The vehicle and the method have advantages that appearance three-dimensional image modeling of a straddle type monorail can be completed quickly and effectively, and a problem that a traditional scanning method is complex in operation is solved; a workload of an operator is greatly reduced on the condition of ensuring efficiency; and accurate detection of a monorail appearance size is completed incombination with a three-dimensional image model.
Owner:GUILIN UNIV OF ELECTRONIC TECH

Scanning module

A scanning module includes a body, a reflecting unit, and an image capture unit. The body includes a reflecting chamber disposed in a surrounding wall. The surrounding wall is formed with an incident hole allowing an incident light field to be transmitted into the reflecting chamber therethrough along an incident axis. The reflecting unit is disposed within the reflecting chamber, and includes a first reflector for reflecting the incident light field, as well as second and third reflectors for reflecting light transmitted from the first reflector to the image capture unit. An angle formed between the incident axis and a normal line of the first reflector is not smaller than 30 degrees. The image capture unit is disposed nearer to the incident hole than the first reflector along a direction of the incident axis, and includes a lens, and a sensing member.
Owner:ASIA OPTICAL INT LTD

Light guide module of scanning apparatus

A light guide module of a scanning apparatus includes plural side-emitting light emitting diodes and a light-guiding post, which are disposed on a circuit board. The light-guiding post has plural reflective structures corresponding to respective side-emitting light emitting diodes for receiving light beams from respective side-emitting light emitting diodes. A spacing interval between two of the side-emitting light emitting diodes at a middle portion of the circuit board is greater than a spacing interval between two of the side-emitting light emitting diodes at a side of the circuit board.
Owner:PRIMAX ELECTRONICS LTD

Dust tolerant windowless scanner

InactiveUS7280256B2Avoid accumulationLess sensitive to particle contaminationPictoral communicationComputer scienceReference surface
A dust tolerant scanner without a transparent plate to support objects scanned by its media scan assembly. Other dust or debris collecting surfaces in the optical path of the scanner are positioned as far away as possible from an object focal plane of the media scan assembly. The media scan assembly includes upper and lower document feeder portions which define a media path adjacent to a reference surface of the upper portion. The lower document feeder portion includes a media conformance member which positions pieces of media against the reference surface as the pieces of media are advanced along the media path. The media conformance member includes ramp portions and an aperture which provides an optical path between the object focal plane and a sensor focal plane within the scanner.
Owner:HEWLETT PACKARD DEV CO LP

Three-dimensional laser scanning head

PendingCN107894661ARealize a wide range of full-angle scanningEasy to controlOptical elementsOptical pathLaser scanning
The invention discloses a three-dimensional laser scanning head, and the scanning head comprises an optical path assembly and a drive assembly, wherein the drive assembly includes a planetary gear transmission group, and the optical path assembly comprises a semi-transmission and semi-reflection mirror, a total reflection mirror group and a field lens. The drive assembly can be set at one end of the field lens, thereby enabling the drive assembly to be disposed between the semi-transmission and semi-reflection mirror and the field lens. The drive assembly can be set at the other end of the field lens, thereby enabling the field lens to be disposed between the semi-transmission and semi-reflection mirror and the drive assembly. In addition, several schemes which meet the different scanningdemands are designed for the total reflection mirror group. The scanning head is provided with the planetary gear transmission group, thereby achieving the independent movement in the rotation direction, and simplifying the control of a transmission system. The scanning head is convenient to operate, and improves the movement precision. The invention also provides the other structural layout, thereby enabling the total reflection mirror group to employ a total reflector with the increased mirror surface area so as to enlarge the scanning range. In addition, a variable focal length system and alaser range-finding system are added, thereby enabling the scanning head to have corresponding functions.
Owner:曾林旺

Image reading device with double image sensors

The invention discloses an image reading device with double image sensors, which is applicable to a transaction machine provided with a transaction machine body and an automatic paper feed unit. The image reading device comprises a first image sensor arranged on the automatic paper feed unit and a second image sensor arranged on the transaction machine body, wherein the first image sensor and the second image sensor respectively sense and read information of the first face and the second face of a manuscript; the first image sensor at least comprises a first optical component, a first correcting element and an elastic contact part; the first optical component is composed of a first light source, a first sensing element and a glass surface; the first correcting element is arranged at the opposite side of the first optical component; one end of the elastic contact part is a fixed end while the other end thereof is contacted with the glass surface of the first optical component so as to lead the manuscript to be tightly attached on the glass surface.
Owner:TECO IMAGE SYST

Scanner and homing method of scanning module thereof

A scanner including a casing, a scanning platform, a scanning module and a positioning plate is provided. The scanning platform is embedded in the casing and exposes a surface to carry a to-be-scanned document. The scanning module is disposed under the scanning platform. The positioning plate disposed on an inner wall of the casing is adjacent to a top side of the scanning platform. The scanning module is for capturing images of the positioning plate and the inner wall and for identifying the image corresponding to one x-axis side of the positioning plate. The scanner defines a scanning start line according to the image corresponding to the x-axis side. The scanning module is moved from the scanning start line along a y-axis direction and captures an image of the to-be-scanned document. The x-axis side and the scanning start line are perpendicular to the y-axis direction perpendicular to the top side.
Owner:QUISDA CORP

Scanning device

A scanning device including a scanning platform, a bar, a carriage, a contact image sensor, a positioning member and an elastic member is provided. The bar disposed below the scanning platform is parallel to the first edge. The carriage has a bottom surface and a top surface. The bottom surface has a receiving part for receiving the bar. The top surface faces the scanning platform. The carriage is slideably moved below the scanning platform along the bar. The contact image sensor disposed on the top surface is for scanning a document. The positioning member which is slideably or rotatably disposed on the bottom surface is for pressing against the bar. The elastic member is connected to the carriage and the positioning member and provides an elastic force to the positioning member. The elastic force transmitted to the bar enables the contact image sensor to press the scanning platform tightly.
Owner:BENQ CORP

Dual-slope light guide, light source module and optical assembly for scanner

A dual-slope light guide includes a first surface, a second surface and a curved surface. The first surface has first reflecting structures. The second surface, connected to the first surface, has second reflecting structures. An included angle between the first surface and the second surface is unequal to 180 degrees. The curved surface connects the first surface to the second surface. The first surface, the second surface and the curved surface extend from a first end of the light guide to a second end of the light guide. A light beam incident to the first end of the light guide is reflected and converted by the first reflecting structure and the second reflecting structure into linear light emitted from the curved surface. A light source module and an optical assembly for a scanner are also disclosed.
Owner:AVISION

Computer scanner and use method thereof

The invention discloses a computer scanner. The computer scanner comprises a scanner body; a scanner panel is arranged on the upper surface of the scanner body; a scanner cover plate is hinged at oneside of the scanner body; locating columns are arranged on the upper surface of the scanner body and positioned at two sides of the scanner panel; a locating hole matched with the locating column is arranged on the scanner cover plate in a penetrating manner; a rectangular groove is arranged on the front surface wall of the scanner body; a charging interface and a data transmission interface are arranged in the rectangular groove; a flip cover is hinged at one side of the rectangular groove; and support legs are installed in four corners at the bottom of the scanner body. The computer scannerin the invention is simple in structure, convenient to operate, high in scanning efficiency and good in scanning effect; furthermore, the flip cover is hinged at one side of the rectangular groove; when the computer scanner is not used in normal use, the rectangular groove is covered; therefore, impurities, such as surrounding dust and water, can be prevented from entering the charging interface and the data transmission interface; and thus, normal use of the scanner cannot be influenced.
Owner:合肥享淘科技有限公司

Light spot suppression method in bright field defect scanning

The invention relates to the field of manufacturing of semiconductors, and in particular relates to a light spot suppression method in bright field defect scanning. The light spot suppression method in bright field defect scanning comprises the following steps of: collecting and analyzing light spots generated by a semiconductor device subjected to defect scanning in real time, timely converting the real-time light spot information into a light spot graph, manufacturing a light spot blocking plate with a matched shape according to the light spot graph, and performing a defect detection process according to the light spot blocking plate. Therefore, the influence of the unexpected light spot graph on the process progress can be effectively avoided, the influence of the light spots on the defect detection process is effectively suppressed, and the scanning quality is greatly improved, so that the scanning sensitivity of a cabinet is guaranteed.
Owner:SHANGHAI HUALI MICROELECTRONICS CORP

Digital pathological section target area identification method and system, equipment and medium

The embodiment of the invention discloses a digital pathological section target area identification method. The method comprises the following steps: acquiring a pathological section scanning image; inputting the pathological section scanning image into a preset recognition model based on deep learning; extracting contour features of the pathological section scanning image through the image contour feature extraction sub-model to obtain a contour image; segmenting the contour image through the image segmentation sub-model to obtain a plurality of sub-contour images; performing classification identification on the plurality of sub-contour images through an image classification sub-model to obtain a region category corresponding to each sub-contour image; the target area image is determinedaccording to the area category of each sub-contour image, so that the scanning efficiency and the scanning quality of the pathological section are improved, the accuracy of the target area image is improved, and the memory space of the digital pathological section is reduced. In addition, the invention also provides a digital pathological section target area identification system, equipment and amedium.
Owner:GUANGZHOU KINGMED DIAGNOSTICS CENT +2

Document scanning image correction method and device, storage medium and electronic equipment

InactiveCN112153239AAvoid issues with poor scan resultsImprove scan qualityPictoral communicationComputer graphics (images)Radiology
The embodiment of the invention provides a document scanning image correction method and device, a storage medium and electronic equipment. In the technical scheme, a document scanning image is obtained, the document scanning image comprises multiple page scanning images, brightness detection is carried out on each page scanning image to obtain brightness values of multiple pixel units in each page scanning image, and the brightness values of multiple pixel units in each page scanning image are compared with the brightness values of multiple pixel units. And the brightness values of the pixelunits of which the brightness values are lower than a preset brightness value are corrected to a preset brightness mean value, generating corrected page scanning images from the corrected pixel unitsand the remaining pixel units, splicing the plurality of corrected page scanning images to generate corrected document scanning images, and outputting the corrected document scanning images. The problem of poor scanning result caused by uneven brightness of the document scanning image is avoided, so that the scanning quality of the document scanning image is improved, and the scanning efficiency of the document scanning image is improved.
Owner:北京辰光融信技术有限公司 +2

Resetting method for scanning device and scanning module

The invention provides a homing method for a scanning device and a scanning module thereof. A positioning plate of the scanning device is arranged on the inner wall of a shell; the scanning module indentifies at least one X axis side image corresponding to the positioning plate and determines a starting line for scanning according to the X axis side image. The homing method identifies at least one X axis side image corresponding to the positioning plate by capturing images between the positioning plate and the inner wall of the shell of the scanning device and determines the starting line of scanning according to the X axis side image and captures the image of a document to be scanned by moving along a Y axis direction from the starting line for scanning. The scanning module of the invention can accurately carry out homing and positioning, thus completely capturing the image of the document to be scanned and correspondingly improving the quality of the scanning. Meanwhile, a monochromic positioning plate can be adopted and the positioning plate does not need to set patterns in a manner of printing, therefore the cost and complexity of the production are lower than those of the traditional positioning structure, which is also beneficial for improving the facilitation and precision of the identification of the scanning module.
Owner:QISDA SUZHOU
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