english: There is an XY stage, and then there is a focusing stage, which is a flexure mechanism that's built in paper itself that allows us to move and focus the lenses by micron steps.
non_english: na krížovej rovine si ju nastavíte a potom zaostrujete, pomocou ohýbacieho mechanizmu zabudovaného priamo do papiera, má to mikrónovú presnosť.