uses a light source, typically a light-emitting diode, and a light detector, such as an array of photodiodes or an image sensor, to detect movement relative to a surface. It is an alternative to themechanical mouse, which uses moving parts to perform the same function.
The earliest optical mice detected movement on pre-printed mousepad surfaces, whereas the modern optical mouse works on most opaque surfaces; it is usually unable to detect movement on specular surfaces like glass, although some advanced models can function even on clear glass. Laser diodes are also used for better resolution and precision. Battery-powered wireless optical mice flash the LED intermittently to save power, and only glow steadily when movement is detected.
Laser Mouse
is a type of computer pointing device that uses a laser beam rather than a ball to track the movement of the user's hand. This type of mice are becoming increasingly common because they are perceived to have better tracking ability. In addition, they are not as subject to gumming up and subsequent distortion of the signal as conventional ball mice. The lack of moving parts also makes them far less subject to damage.
Before the laser mouse, the optical mouse became widespread in the late 1990s, shipping as an extra feature on many computer systems. Users immediately began to sing the praises of this device, saying that it made work much easier than a traditional mouse, and it is becoming increasingly difficult to find a ball mouse as a result. The optical mouse is also available in a wireless format, making it an extremely versatile and flexible tool for users who like to have free range of their cordless desks.
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