论文标题
一种用于确定星星望远镜焦点的傅立叶方法
A Fourier method for the determination of focus for telescopes with stars
论文作者
论文摘要
我们引入了一种傅立叶方法（FM），以确定带有星星的望远镜的最佳焦点。我们的方法符合我们将在本文中得出的功率函数，即作为焦点位置函数的一组图像。最佳焦点位置是功率最大的位置。 FM首先用小型折射率和Schmidt-Cassegrain（SCT）望远镜测试。成功进行小型望远镜测试后，我们用2 M Ritchey-Chrétien-Coudé（RCC）测试了FM。我们的测试表明，FM不受流行的半流量直径方法固有的问题的影响。
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 (SCT) telescopes. After the successful small telescope tests, we then tested Fm with a 2 m Ritchey-Chrétien-Coudé (RCC). Our tests show that Fm is immune to the problems inherent in the popular half-flux diameter method.
