scanning devices wikipedia

List four scanning devices and explain how a scanning device works. Medical ultrasound (also known as diagnostic sonography or ultrasonography) is a diagnostic imaging technique, or therapeutic application of ultrasound.It is used to create an image of internal body … A scanner is an input device that scans documents such as photographs and pages of text. An RFID tag consists of a tiny radio transponder; a radio receiver and transmitter. Radio-frequency identification (RFID) uses electromagnetic fields to automatically identify and track tags attached to objects. These mechanisms allow the highest scanning frequencies possible so far. A fingerprint sensor is an electronic device used to capture a digital image of the fingerprint pattern. When two optical lenses are moved or rotated against each other, a laser beam can be scanned in a way similar to mirror scanners. Network scanning is mainly used for security assessment, system maintenance, and also for performing attacks by hackers. A handheld scanner, as the name suggests, refers to an electronic device that performs the same tasks as that of a flatbed scanner. When a document is scanned, it is converted into a digital format. In these devices, a semiconductor laser beam is usually scanned with the help of a resonant mirror scanner. Annals of forest science, 68(5), 959-974. Barbara Sher uses the word "scanner" for someone who scans the surface of things, as opposed to "divers" or experts. However, piezoelectric actuators or magnetostrictive actuators are alternative options. 3D scanning is also used for mobile mapping, surveying, scanning of buildings and building interiors, and in archaeology. See more. 1. A software system usually controls the scanning motion and, if 3D scanning is implemented, also the collection of the measured data. In order to determine its relative position to the space station, laser scanners built into the front of the space transporter scan the shape of the space station and then determine, through a computer, the maneuvering commands. Many retail and grocery stores use some from of bar code reader to determine the item being sold and to retrieve the … On the other hand, these systems are also much more expensive than mirror scanning systems. See mobile tagging. Here the software has to control what is done exactly within such a multihead application: it is possible that all available heads have to mark the same to finish processing faster or that the heads mark one single job in parallel where every scanhead performs a part of the job in case of large working areas. This scanhead consists of two mirrors that are able to deflect the laser beam in one level (X- and Y-coordinate). Laser light shows typically uses two galvanometer scanners on a X-Y configuration to draw patterns or images on walls, ceilings or other surfaces including theatrical smoke and fog for entertainment or promotional purposes. 1. a. When triggered by an electromagnetic interrogation pulse from a nearby RFID reader device… This method is used to scan radar beams without moving parts. [1] Such scanners are used for tracking missiles. To look over quickly or read … For these cases it is important that the laser has as small a focal point as possible. The tricorder of the 23rd century, as seen in Star Trek: The Original Series, is a black, rectangular device with a top-mounted rotating hood, two opening compartments, and a shoulder strap.The top … The scanner does not recognize or differentiate in any manner the content of the material it is scanning… What does scanning mean? Scanning Devices, Inc. 125 High Street. Unit … By taking a distance measurement at every direction the scanner rapidly captures the surface shape of objects, buildings and landscapes. With higher powers the material becomes fluid and laser welding can be realized, or if the power is high enough to remove the material completely, then laser cutting can be performed. The purpose of network scanning … This live scan is digitally processed to create a biometric … This creates an electronic version of the document that can be viewed and edited on a computer. The company's File Number is listed as 723909. Disambiguation page providing links to topics that could be referred to by the same search term, https://en.wikipedia.org/w/index.php?title=Scanner&oldid=986302711, Disambiguation pages with short descriptions, Short description is different from Wikidata, Creative Commons Attribution-ShareAlike License, Scanner, the stage name of British electronic musician, A personality type described by self-help author, This page was last edited on 31 October 2020, at 00:45. Imaging System: image scanner (graphic scanner converts text, drawings, and photographs into digital form and stores it to the computer system for further processing. Laser scanning is the controlled deflection of laser beams, visible or invisible. Scanning the laser focus in the third spatial dimension is needed for some special applications like the laser scribing of curved surfaces or for in-glass-marking where the laser has to influence the material at specific positions within it. In laser projectors for laser TV or laser displays, the three fundamental colors - red, blue, and green - are combined in a single beam and then reflected together with two mirrors. Most of the scanners available in the market use CCD (charge-coupled device) … n. 1. Types of scanning devices are the vertical zebra-striped marks you see on most manufactured retail products – everything from candy to cosmetics to a comic book. Hand-held laser scanners create a 3D image through the triangulation mechanism described above: a laser dot or line is projected onto an object from a hand-held device and a sensor (typically a charge-coupled device or position sensitive device) measures the distance to the surface. Scanned laser beams are used in some 3-D printers, in rapid prototyping, in machines for material processing, in laser engraving machines, in ophthalmological laser systems for the treatment of presbyopia, in confocal microscopy, in laser printers, in laser shows, in Laser TV, and in barcode scanners. Additionally, the mirrors can lead to a periodic motion - like the rotating mirror polygons in a barcode scanner or so-called resonant galvanometer scanners - or to a freely addressable motion, as in servo-controlled galvanometer scanners. A scanner is a device that captures images from photographic prints, posters, magazine pages, and similar sources for computer editing and display. Scanned laser beams are used in some 3-D printers, in rapid prototyping, in machines for material processing, in laser engraving … With the use of Vertical-cavity surface-emitting laser (VCSELs), it might be possible to realize fast laser scanners in the foreseeable future. Other words for scanner includes polymath, renaissance soul, multitalent, generalist and multipotentialite (as in Multipotentiality). (8 marks) Answers - Image scanner – converts images on a page to electronic signals - Character and mark Recognition devices – scanning devices … It is used to scan physical documents into their digital forms that can be … Once there, part of the device opened on the top and emitted a yellow scanning … The third dimension is - if necessary - realized by a specific optic that is able to move the laser's focal point in the depth-direction (Z-axis). Small objects can be placed on a revolving pedestal, in a technique akin to photogrammetry.[2]. (3) An optical device that reads a printed page or transparency and converts it into a graphics image for the computer. Define Scanning device. The scanning device was a device created by the Stragoth race. They offer higher achievable angular speeds, but often at the expense of smaller achievable maximum angles. The captured image is called a live scan. For example, a scanner may be used to … Within the field of 3D object scanning, laser scanning (also known as lidar) combines controlled steering of laser beams with a laser rangefinder. The mirror is driven electromagnetically and is made of a metal-coated polymer. Each of the two flat or polygonal mirrors is then driven by a galvanometer or by an electric motor. Dassot, M., Constant, T., & Fournier, M. (2011). One of the most useful features of the C-Pen Reader (about $245) is its display, … To look at carefully or thoroughly, especially in search of something; examine: The sailor scanned the horizon for signs of land. List four scanning devices and explain how a scanning device works . b. Resonant galvanometer scanners are used for this application. When referring to hardware, a scanner or optical scanner is a hardware input device that optically "reads" and image and converts it into a digital signal. A barcode reader is an optical scanner that can read printed barcodes, decode the data contained in the barcode and send the data to a computer. One also uses the terms raster scanning and vector scanning to distinguish the two situations. Scanning Devices uses its expertise in Sensors, Instruments and Controls to design and manufacture products for a wide variety of industries and applications. In North America supermarkets, Scanning devices include barcode reader’s mark- and character recognition devices … Of all the scanning devices, you are probably most familiar with BAR CODE READES. A scanner is an electronic device that scans printed or handwritten text documents, images, or certain objects, and converts them into a digital file format. The steering of the beam can be one-dimensional, as inside a laser printer, or two-dimensional, as in a laser show system. This is achieved by a servo-controlled lens system, usually called a 'focus shifter' or 'z-shifter'. Scanning device synonyms, Scanning device pronunciation, Scanning device translation, English dictionary definition of Scanning device. To control the scanning motion, scanners need a rotary encoder and control electronics that provide, for a desired angle or phase, the suitable electric current to the motor or galvanometer. Construction of a full 3D model involves combining multiple surface models obtained from different viewing angles, or the admixing of other known constraints. The use of terrestrial LiDAR technology in forest science: application fields, benefits and challenges. The Goa'uld scanning device was a type of technology used by the Goa'uld. C-Pen Reader. It was thrown through the Stargate whereupon it landed in its new environment. Learn how and when to remove this template message, https://en.wikipedia.org/w/index.php?title=Laser_scanning&oldid=953736410, Articles needing additional references from March 2017, All articles needing additional references, Articles with unsourced statements from August 2018, Creative Commons Attribution-ShareAlike License, This page was last edited on 28 April 2020, at 20:16. One that scans: a scanner of … Some special laser scanners use, instead of moving mirrors, acousto-optic deflectors or electro-optic deflectors. Some applications require positioning the focus of a laser beam in three dimensions. For enhanced laser scanning applications and/or high material throughput during production, scanning systems with more than one scanhead are used. The principle that is used for all these applications is the same: software that runs on a PC or an embedded system and that controls the complete process is connected with a scanner card. 3D object scanning allows enhancing the design process, speeds up and reduces data collection errors, saves time and money, and thus makes it an attractive alternative to traditional data collection techniques. Scanning is quickly looking over a vast area at all parts of something. (2) A smartphone application that reads barcodes. There are also microscanners, which are MEMS devices containing a small (millimeter) mirror that has controllable tilt in one or two dimensions; these are used in pico projectors. scanner (1) A synonym for antivirus program. In order to position a laser beam in two dimensions, it is possible either to rotate one mirror along two axes - used mainly for slow scanning systems - or to reflect the laser beam onto two closely spaced mirrors that are mounted on orthogonal axes. The Registered Agent on file for this company is Inactive Agent … For for applications specific to mapping and 3D object reconstruction, see. Data is collected in relation to an internal coordinate system and therefore to collect data where the scanner is in motion the position of the scanner … It might be possible to realize fast laser scanners use moveable mirrors to steer laser... ) a synonym for antivirus program applications in material processing, confocal microscopy and... An optical device that reads barcodes a galvanometer or by an electromagnetic interrogation from... The beam can be one-dimensional, as inside a laser printer, or the of... ( 3 ) an optical device that reads a printed page or transparency converts. Radio receiver and transmitter objects, buildings and building interiors, and medical science on August 11, 1969 full... Tv systems performing attacks by hackers scanners use, instead of moving mirrors, acousto-optic or! 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