Isn't this very similar to the way optical position encoders work? | Hacker News

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		heisenbit on Nov 7, 2024 \| parent \| context \| favorite \| on: Ultraprecise method of aligning 3D semiconductor c... Isn't this very similar to the way optical position encoders work?

scheme271 on Nov 8, 2024 [–]

I think the difference is that you don't need to change the focus of the optical sensors in order to verify alignment. So you don't have to worry about movement while the focus is changed.

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