They depend on lapping, which can be done “manually” by the robot arm. I forgot to list “abrasive powder” in my list of vitamin ingredients. Fixed now.
The fancier optical techniques provide precision on the order of a wavelength, which is far in excess of our needs. All we need is eyeball-class optical techniques like looking along an edge to make sure it’s straghtish, or pressing a part against a surface plate and seeing if light passes under it.
They depend on lapping, which can be done “manually” by the robot arm. I forgot to list “abrasive powder” in my list of vitamin ingredients. Fixed now.
The fancier optical techniques provide precision on the order of a wavelength, which is far in excess of our needs. All we need is eyeball-class optical techniques like looking along an edge to make sure it’s straghtish, or pressing a part against a surface plate and seeing if light passes under it.