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This is due to the unevenness of the desktop, (which looks flat but is actually very rough) and the position of the photoelectric mouse after the laser light is reflected back and the mouse pointer moves. It's good to buy a solid mouse pad. (The color of the color is not good because the ability of various colors to reflect light is different) it is best to be blue or black.
This will not be the case.
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You shouldn't be able to use an optical mouse on ordinary glass, and if you can use it, you have to add a mouse shop and white paper to use it.
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There are more photoelectric mice that can be used on transparent glass, the main component of glass is silica, and there are indeed several special rays of light that can be perfectly reflected by silica without being penetrated and absorbed. One is indigo and the other is violet-blue.
I've used several of them, I don't need any mouse pad, I just put it on a completely transparent glass, and the mouse movement is not sluggish, and the performance is very smooth!
I still have second-hand ones, who wants to share them and sell them to you
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