Open AccessAzimuthal position error correction algorithm for absolute test of large optical surfaces
Author(s) -
Hyug-Gyo Rhee,
Yun-Woo Lee,
Seung-Woo Kim
Publication year - 2006
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.14.009169
Subject(s) - rotation (mathematics) , azimuth , optics , position (finance) , interferometry , algorithm , physics , optical rotation , computer science , artificial intelligence , finance , economics
Absolute test needs test part rotation to separate errors of the interferometer itself from errors due to the test surfaces. At this time, previous absolute test algorithms assume no azimuthal position error during part rotation. For large optics whose diameters are 0.6 m and over, however, exact rotations are physically difficult. Motivated by this, we propose a new algorithm that adopts least squares technique to determine the true azimuthal positions of part rotation and consequently eliminates testing errors caused by rotation inaccuracy.