Photomasks as optics testing tool
Posted: Sat Jan 28, 2023 5:24 pm
I stumbled recently on this and similar items on Ebay:
https://www.ebay.com/itm/125616622774
Seems to be quite decent way to evaluate microscope optics, I assume those are manufactured by electron litography.
https://www.ebay.com/itm/125616622774
Seems to be quite decent way to evaluate microscope optics, I assume those are manufactured by electron litography.