The fidget spinner rotational speed is the resonant frequency by adjusting the fiber loop light and then measure the loop, you can create a fidget spinner resonant optical fiber instrument.
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When the optical loop is rotated, the optical path of the optical loop will change with respect to the optical path of the loop in different directions. The change of the optical path, if interference to measure the rotational speed of the forward loop between the light in different directions, you can create a fidget spinner interferometric fiber optic instrument, if the change is using this path to achieve continuous loop circulation in the loop interference of light, from this simple introduction can be seen, the optical path interferometric fidget spinner instrument in the implementation of interference when difference is small, so it can have the required light source spectrum width is larger, while the fidget spinner instrument in resonant interferometer, the optical path difference is large, so it is required for the light source must be monochromatic very good.
Fidget spinner in high speed rotation »