The Physics Behind Optical Mouse Technology

[zenith]

How optical mouse to work?
What's principle of the physics?

thanks b4

 

[Mk]

Wikipedia:

Modern surface-independent optical mice work by using an optical sensor to take successive pictures of the surface the mouse is operating on. Most of these mice use LEDs to illuminate the surface that is being tracked; LED optical mice are often mislabeled as 'Laser Mice', probably due to the red LED which is used in almost all optical mice, though lasers are becoming more common, as they allow greater precision in movement detection. Changes between one frame and the next are processed by the image processing part of the chip and translated into movement on the two axes. For example, the Agilent Technologies ADNS-2610 optical mouse sensor processes 1512 frames per second: each frame is a rectangular array of 18*18 pixels, and each pixel can sense 64 different levels of gray.
Demand for advances in optical mouse technology comes in large part from competitive FPS gamers, who prefer more accurate mice for more accurate aiming. Razer USA Ltd was the first to launch the 1600 dpi Razer Diamondback which was developed together with Agilent Technologies. Razer USA Ltd was led the mouse arms race for a year before Logitech caught up with its MX518 gaming mouse which also featured a 1600 dpi optical sensor.

Yay.

 

[zenith]

Thanks, anyone give me referal of this study about optical mouse?

 

[Vixus]

There's a program (readmouse) that dumps the little pictures that the mouse takes. Heh heh.

 

[dumbobie]

An optical mouse is an advanced computer pointing device that uses a light-emitting diode (LED), an optical sensor, and digital signal processing (DSP) in place of the traditional mouse ball and electromechanical transducer. Movement is detected by sensing changes in reflected light, rather than by interpreting the motion of a rolling sphere.

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.

In practice, an optical mouse does not need cleaning, because it has no moving parts. This all-electronic feature also eliminates mechanical fatigue and failure. If the device is used with the proper surface, sensing is more precise than is possible with any pointing device using the old electromechanical design. This is an asset in graphics applications, and it makes computer operation easier in general.

--From an internet dictionary

 

[zenith]

Is anyone give me of the reffernce about it?
I wish learn it!

 

[chroot]

http://en.wikipedia.org/wiki/Optical_mouse

We don't know what you're asking for, zenith.

- Warren

 

[BryanP]

Is anyone give me of the reffernce about it?
I wish learn it!

I don't get what you're asking for. They already gave you references on it.

Plus, I don't see what something like Googling or Yahoo-ing cannot do in this situation. Try searching first (you will most likely get your information there), then ask if you can't find the information online.

 

[darkar]

Umm, my mouse has no red light but rather there's a label "Invisible Optic". I wonder what taht exactly means. Does taht mean it use Infra/UV? Which one will give more precission?

 

[moose]

Something interesting is that my microsoft optical mouse works flawlessly on every single surface I've ever tried, including extremely clear class.

 

[Shailen Sobhe]

I wonder how the mouse is able to detect motion on a perfectly uniform surface.

What if the mouse is moved at a very slow speed such that each image taken by the mouse is completely similar to each other?

 

[sharmavk83]

I wonder how the mouse is able to detect motion on a perfectly uniform surface.

What if the mouse is moved at a very slow speed such that each image taken by the mouse is completely similar to each other?

as they said, it works at 1500 fps (frames per second) and even then is able to detect differences between the frames. how do you think you will manage to move your mouse at such a slow speed that the frames are identical in every aspect? you are theoretically correct but the task is practically impossible. this is the very reason why mice doesnot work well on clear clean glass...