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The optical mouse works
by the same principles as a mechanical mouse,
except that it uses an LED and a special mouse
pad to track the movements of the mouse.
The LED shines from
the bottom of the mouse and is reflected back
by the pad into a photo sensor.
The mouse pad itself has
a grid of horizontal and vertical lines
that absorb the light when it hits them.
The alternating light
and dark signals are used to track X-Y
movements on the pad.
The new IntelliMouse from Microsoft eliminates the need for special mouse pad while still being a true optical mouse. The LED and photo sensor instead use the natural variations of any surface to track the X-Y movements.
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CertiGuide to A+ (Core Hardware) (http://www.CertiGuide.com/aplush/) on CertiGuide.com
Version 1.0 - Version Date: December 6, 2004
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