scanning devices wikipedia

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. The captured image is called a live scan. Other words for scanner includes polymath, renaissance soul, multitalent, generalist and multipotentialite (as in Multipotentiality). Many barcode readers, especially those with the ability to read bar codes at a distance of a few meters, use scanned laser beams. Each of the two flat or polygonal mirrors is then driven by a galvanometer or by an electric motor. 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. The use of terrestrial LiDAR technology in forest science: application fields, benefits and challenges. With the use of Vertical-cavity surface-emitting laser (VCSELs), it might be possible to realize fast laser scanners in the foreseeable future. Scanned laser beams are used in some 3-D printers, in rapid prototyping, in machines for material processing, in laser engraving … (3) An optical device that reads a printed page or transparency and converts it into a graphics image for the computer. 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. Many laser scanners further allow changing the laser intensity. One that scans: a scanner of … Network scanning is mainly used for security assessment, system maintenance, and also for performing attacks by hackers. Laser scanning is the controlled deflection of laser beams, visible or invisible. Like a flatbed scanner, it consists of a light source, a lens … Small objects can be placed on a revolving pedestal, in a technique akin to photogrammetry.[2]. 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). Construction of a full 3D model involves combining multiple surface models obtained from different viewing angles, or the admixing of other known constraints. The steering of the beam can be one-dimensional, as inside a laser printer, or two-dimensional, as in a laser show system. scanner (1) A synonym for antivirus program. This creates an electronic version of the document that can be viewed and edited on a computer. To look over quickly or read … A scanner is a device that captures images from photographic prints, posters, magazine pages, and similar sources for computer editing and display. Depending on the power of the laser, its influence on a working piece differs: lower power values are used for laser engraving and laser ablation, where material is partially removed by the laser. Dassot, M., Constant, T., & Fournier, M. (2011). To look at carefully or thoroughly, especially in search of something; examine: The sailor scanned the horizon for signs of land. A scanner is an input device that scans documents such as photographs and pages of text. In North America supermarkets, Scanning devices include barcode reader’s mark- and character recognition devices … [citation needed], This article is about laser scanning in general. 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. 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. For these cases it is important that the laser has as small a focal point as possible. This method is used to scan radar beams without moving parts. Radio-frequency identification (RFID) uses electromagnetic fields to automatically identify and track tags attached to objects. Scanning Devices uses its expertise in Sensors, Instruments and Controls to design and manufacture products for a wide variety of industries and applications. The ability of lasers to harden liquid polymers, together with laser scanners, is used in rapid prototyping, the ability to melt polymers and metals is, with laser scanners, to produce parts by laser sintering or laser melting. Optical character recognition or optical character reader (OCR) is the electronic or mechanical conversion of images of typed, handwritten or printed text into machine-encoded text, whether from a scanned … Of all the scanning devices, you are probably most familiar with BAR CODE READES. These silver hand held spherical devices were typically employed during exploration of new worlds with a Stargate. The mirror is driven electromagnetically and is made of a metal-coated polymer. What does scanning mean? It is used to scan physical documents into their digital forms that can be … The company's File Number is listed as 723909. That card converts the received vector data to movement information which is sent to the scanhead. They are used, for example, in laser TV systems. 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. When two Risley prisms are rotated against each other, a beam of light can be scanned at will inside a cone. Most laser scanners use moveable mirrors to steer the laser beam. Some applications require positioning the focus of a laser beam in three dimensions. The most common way to move mirrors is, as mentioned, the use of an electric motor or of a galvanometer. 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. (8 marks) Answers - Image scanner – converts images on a page to electronic signals - Character and mark Recognition devices – scanning devices … When a space transporter has to dock to the space station, it must carefully maneuver to the correct position. Resonant galvanometer scanners are used for this application. 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. Scanners come in hand-held, feed-in, and flatbed types and for scanning … In these devices, a semiconductor laser beam is usually scanned with the help of a resonant mirror scanner. See mobile tagging. The scan device is a device used by Tau'ri for analysis of energy. Types. 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 … Modern lasers can cut steel blocks with a thickness of 10 cm and more or ablate a layer of the cornea that is only a few micrometers thick. 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. List four scanning devices and explain how a scanning device works . An RFID tag consists of a tiny radio transponder; a radio receiver and transmitter. Most of the scanners available in the market use CCD (charge-coupled device) … Such scanners are used for tracking missiles. 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