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Question

The barcode which is used on all types of items, is read by a scanning device directly into the computer. What is the name of this scanning device?

A
Laser scanner
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B
Wand
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C
OCR
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D
MICR
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E
None of the above
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Solution

The correct option is D Laser scanner

The barcode which is used on all types of items, is read by a scanning device directly into the computer. Laser scanner is the name of this scanning device.

A bar code reader (or bar code scanner) is an electronic device that can read and output printed barcodes to a computer. Like a flatbed scanner, it consists of a light source, a lens and a light sensor translating optical impulses into electrical ones.

In modern surveying, the general meaning of laser scanning is the controlled deflection of laser beams, visible or invisible. Within the field of 3D object scanning, laser scanning (also known as lidar) combines controlled steering of laser beams with a laser rangefinder. By taking a distance measurement at every direction the scanner rapidly captures the surface shape of objects, buildings and landscapes. Construction of a full 3D model involves combining multiple surface models obtained from different viewing angles, or the admixing of other known constraints. Small objects can be placed on a revolving pedestal, in a technique akin to photogrammetry.


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