Open AccessМетодика измерения параметров вогнутых крупногабаритных асферических зеркал с помощью датчика волнового фронта
Author(s) -
Т.С. Пискунов,
Н.В. Барышников,
И.В. Животовский,
А.А. Сахаров,
В.А. Соколовский
Publication year - 2019
Publication title -
žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-748X
pISSN - 0044-4642
DOI - 10.21883/os.2019.10.48362.167-19
Subject(s) - zernike polynomials , conic section , eccentricity (behavior) , optics , radius , physics , wavefront , wavefront sensor , curved mirror , deformable mirror , mathematics , geometry , computer science , computer security , political science , law
A methodology has been developed for measuring radius R _v and eccentricity (conic parameter k ) of large concave aspherical mirrors using a wavefront sensor. Analytical expressions that directly relate Zernike coefficients a _4 and a _9 to parameters R _v and k of the mirror are obtained. It is shown that the technique does not require accurate mirror alignment before measurements. A computer analysis showed that the developed scheme enables measurements with errors of δ R _v < 0.1% and δ k < 0.01 for mirrors with radii from 100 to 2000 mm and with errors of δ R _v < 0.01% and δ k < 0.001 for mirrors with radii of more than 5000 mm.