What is the design principle of the mouse?

Now commonly used mouse is called "photoelectric mouse", and its working principle is as follows:

1, there is a light-emitting diode inside the optical mouse, and the light it emits can illuminate the bottom of the optical mouse (this is why the bottom of the mouse always shines).

2. Part of the light reflected from the bottom of the optical mouse passes through a group of optical lenses, and then is transmitted to the optical sensing device (micro imager) for imaging.

3. When the optical mouse moves, its moving track will be recorded as a group of high-speed continuous images, which will be analyzed and processed by a special image analysis chip (DSP, that is, digital microprocessor) inside the optical mouse. The chip judges the moving direction and distance of the mouse by analyzing the changes of feature points on these images, thus completing the positioning of the cursor.