Most of the computer are using optical mouse now a days since the the invention of wireless mouse.The first Optical mouse was made by Agilent Technologies and marketed in late 1999, the optical mouse uses a miniature camera to take thousands of pictures every second.
The optical mouse is able to work on just about any surface and without the need for a mouse pad, most optical mice use a small, red light-emitting diode (LED) that bounces light off that surface onto a complimentary metal-oxide semiconductor (CMOS) sensor. Recent innovations are laser-based optical mice that detect more surface details than comparable LED technology. This results in the ability to use a laser-based optical mouse on even more surfaces than an LED mouse.
☼ Here's how the sensor and other parts of an optical mouse work together:
* The CMOS sensor sends each image to a digital signal processor (DSP) for analysis.
* The DSP detects patterns in the images and examines how the patterns have moved since the previous image.
* The computer moves the cursor on the screen based on the coordinates received from the mouse. This happens hundreds of times each second, making the cursor appear to move very smoothly.
☼ The optical mouse has several benefits over a track-ball mouse:
* No moving parts means less wear and a lower chance of failure.
* There's no way for dirt to get inside the mouse and interfere with the tracking sensors.
* Increased tracking resolution means a smoother response.
* They don't require a special surface, such as a mouse pad.
