Resolution in an optical mouse

[Wynn]

hi,
i want to know that what are the several factor depends on accuracy of mouse(optical mouse).does resolution in an optical mouse effect on mouse movement to get an accurate response?Any recommendations and suggestions are appreciated.

[deoWo]

Encoder DPI

The encoder DPI/CPI (dots/counts per inch) is the most important factor in determining the smoothness and speed of a mouse. This is described by how many discrete signals are sent to the controller chip when the mouse moves one inch. As the number of signals sent to the chip increases, mouse resolution becomes finer and the resulting motion smoother. The Razer Boomer and Razer Viper use a patented focusing technology that allows much higher DPI than current mice. Most mechanical mice perform at 400-450 DPI, while the Razer line of mice offers resolutions from 1000 to 2100 DPI.

Connection speed/baud

The next critical link to performance is the connection between the mouse and the computer. USB 1.0 has a polling rate fixed at 125 polls/sec and allows for communication to and from the peripheral.

Scroll wheel

The scroll wheel in the Razer Boomer mouse takes advantage of an additional encoder, allowing for faster and more precise scrolling. It's extremely sensitive, providing increased click points per revolution versus the standard scroll wheel. This added capability enhances the current gaming experience and will do so even more as game developers continue to take advantage of advanced scroll wheel technology.

[T.J.]

Optical mice have several benefits over wheeled mice:

• 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 smoother response.
• They don't require a special surface, such as a mouse pad.

[Killen]

The optical mouse takes microscopic snapshots of the working surface at a rate of more than 1,000 images per second. If the mouse is moved, the image changes. The tiniest irregularities in the surface can produce images good enough for the sensor and DSP to generate usable movement data. The best surfaces reflect but scatter light; an example is a blank sheet of white drawing paper. Some surfaces do not allow the sensor and DSP to function properly because the irregularities are too small to be detected. An example of a poor optical-mousing surface is unfrosted glass.