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kleinbl00  ·  580 days ago  ·  link  ·    ·  parent  ·  post: Pubski: August 24, 2022

It's a bitch to do it optically, too. I have the equipment to perform optical metrology down to the micron.

The reason I care is surface finish. quarter wave of 380nm is a tenth of a micron. If I can hold a tenth of a micron I can mirror polish with the machine. "measurement" is utterly pointless for what I'm doing other than verifying the machine.