摘要
本文给出了为中国的2.16米望远镜设计的三种消大气色散主焦点改正器。视场为2°,可产生的最大色散为6"。三种结构均给出非常好的成象成量。主光线与光轴的夹角也很小。工艺上没有特别困难的问题。这些设计不仅可用于2.16米望远镜,对其它大望远镜也是很有意义的。
This paper introduces three types of primary correctors for the Chinese 2.16 m telescope. Each corrector has a 2-degree field and can be used to compensate the atmospheric dispersion of 6'. The primary mirror of the telescope is a 2.16 m hyperboloid with ellipticity 1.0951347 and f-ratio of 3. The first corrector consists of 4 elements, all of their surfaces being spherical. The second corrector also consists of 4 elements, one of which is an ellipsoid. The third one consists of three elements, for which two kinds of structure parameters and the relevant results are given. Lens-prisms (lensms) are used to compensate the atmospheric dispersion. These three types of correctors have similar performances: The maximum element is about 52 cm, and the maximum lensm about 38 cm. the maximum image spread 1.6' and the maximum principal ray angle 1°36'. For each corrector, the spread diagrams under the maximum dispersion and zero dispersion states are given.
出处
《天文学报》
CSCD
北大核心
1993年第2期165-172,共8页
Acta Astronomica Sinica
关键词
光学望远镜
改正器
光学
设计
Optical telescopes—Correctors—Optical design
