摘要
目前在望远镜上广泛使用CCD相机来代替照相底片。但是通常CCD的尺寸很小,即使是在短焦距的望远镜上,也限制了可用的视场。 本文介绍了为一架30厘米施密特卡塞格林望远镜对此目的而设计、制造的一套简单的缩焦器。
The CCD camera is widely used on telescopes now to replace the photoplatas.But the small size of commonly obtainable CCD limits the useable field,even for short focus telescopes.In this article design and construction of a simple focal reducer for a φ30cm Schmidt Cassegrain Telescope on this purpose is presented.
