Non-axisymmetric Aberration Patterns from Wide-field Telescopes Using Spin-weighted Zernike Polynomials

被引:7
作者
Kent, Stephen M. [1 ]
机构
[1] Fermilab Natl Accelerator Lab, MS 127,POB 500, Batavia, IL 60510 USA
关键词
methods: analytical; telescopes; ATMOSPHERIC-TURBULENCE; OPTICAL-ABERRATION; POLARIZATION; EXPANSION;
D O I
10.1088/1538-3873/aaa6b8
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
If the optical system of a telescope is perturbed from rotational symmetry, the Zernike wavefront aberration coefficients describing that system can be expressed as a function of position in the focal plane using spin-weighted Zernike polynomials. Methodologies are presented to derive these polynomials to arbitrary order. This methodology is applied to aberration patterns produced by a misaligned Ritchey-Chretien telescope and to distortion patterns at the focal plane of the DESI optical corrector, where it is shown to provide a more efficient description of distortion than conventional expansions.
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页数:11
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