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Flatbed
Here is the inside top view of a flatbed scanner.
The flatbed scanner was the first scanner ever developed because of
its outright simplicity. It is composed of a large sheet of glass (the
flatbed), a motorized carriage, a light source, and a CCD. The item to
be scanned is placed facedown on a large sheet of glass, and the scanning
is started by the user’s signal. The signal tells the scanner to turn on
the light source and begin "reading the picture". The scanner does this
by moving the CCD using a motorized carriage. The CCD reads the image/document
a line at a time. Gradually, it sends the information back to the computer.
When the scanner is done with the cycle, it signals the scanning software
that it is complete, and the individual lines are compiled together as
one complete image. Flatbed scanners usually connect to the computer using
a SCSI connector. This is due to the enormous amount of data the scanner
requires to be transferred at high speeds.
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All material and images on these pages are copyright Joseph,Ed. This page was developed for the Thinkquest1999
competition.
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