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this post was submitted on 20 Oct 2023
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Wavelength has a very direct impact on the resolution you can print because it's an optical system. Under perfect conditions, it'll be diffraction limited, which is typically anywhere from several hundred nm to tens of microns. That's an ideal system though, you're actually going to be getting a dimensional accuracy somewhat above that in practice, probably tens to hundreds of um.
I couldn't find official dimensional accuracy specs for any formlabs machines except the 1, which lists 150um. Perhaps you're talking about the 3, which has a specified minimum spot size of 85um according to this paper. Where did they claim micron dimensional accuracy?