Open AccessCompensation factors for 3rd order coma in three mirror anastigmatic (TMA) telescopes
Author(s) -
Shijie Xu,
Zongbin Cui,
Bo Qi
Publication year - 2018
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.26.000298
Subject(s) - coma (optics) , cassegrain reflector , telescope , compensation (psychology) , optics , physics , secondary mirror , deformable mirror , adaptive optics , primary mirror , psychology , psychoanalysis
Misalignment induced third-order coma with respect to misaligned parameters in TMA optical systems is derived by using Nodal Aberration Theory, which yields the compensation factors that can be used to accomplish coma compensation in both coaxial and off-axis misaligned TMA telescopes. By using the compensation factors, coma free point for the tertiary mirror in TMA telescopes is derived and proved to be the negative form of the one for the secondary mirror in the Cassegrain telescope. The compensation factors can also be used to design the off-axis TMAs due to their capability of eliminating the coma over the field of view.