![Catherine on Twitter: "hey, how the heck does a ball mouse (or an optical mouse with a similar encoder for the wheel) know the direction in which an axis is being moved? Catherine on Twitter: "hey, how the heck does a ball mouse (or an optical mouse with a similar encoder for the wheel) know the direction in which an axis is being moved?](https://pbs.twimg.com/media/Ek6BKWtVgAEJuOy.png)
Catherine on Twitter: "hey, how the heck does a ball mouse (or an optical mouse with a similar encoder for the wheel) know the direction in which an axis is being moved?
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Schematic of the mouse eye fluorescence AOSLO. LD: fiber coupled laser... | Download Scientific Diagram
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