COMPUTER PERIPHERALS
DIGITAL CAMERAS AND CAMCORDERS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The barcode is first read by a red laser or red LED (LIGHT EMITTING DIODE)
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Light is reflected back off the barcode; the dark areas reflect little or no light which allows the bars to be read
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The reflected light is read by sensors (photoelectric cells)
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The focused image falls onto a CCD made of pixels
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Detailed explanation-1: -There are many reasons bar codes might not scan and most of them can be boiled down to one of three things: Your equipment isn’t suited to your bar codes. Your scanner isn’t being operated properly. Your bar code labels aren’t suited to your application or environment.
Detailed explanation-2: -A barcode reader or barcode scanner is an optical scanner that can read printed barcodes, decode the data contained in the barcode to a computer.
Detailed explanation-3: -Laser light is shone on the label surface and its reflection is captured by a sensor (laser photo detector) to read a bar code. A laser beam is reflected off a mirror and swept left and right to read a bar code Using laser allows reading of distant and wide bar code labels.