SIMBAD references

2022MNRAS.511.2008T - Mon. Not. R. Astron. Soc., 511, 2008-2020 (2022/April-1)

A Fourier method for the determination of focus for telescopes with stars.

TAN C.Y. and SCHULZ B.

Abstract (from CDS):

We introduce a Fourier method (Fm) for the determination of best focus for telescopes with stars. Our method fits a power function, that we will derive in this paper, to a set of images taken as a function of focuser position. The best focus position is where the power is maximum. Fm was first tested with small refractor and Schmidt-Cassegrain telescopes. After the successful small telescope tests, we then tested Fm with a 2 m Ritchey-Chretien-Coude. Our tests show that Fm is immune to the problems inherent in the popular half-flux diameter method.

Abstract Copyright: © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): methods: analytical - methods: data analysis - methods: numerical

Simbad objects: 7

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