摘要
介绍了小F数卡赛格林系统装调的一种方法。用一束平行光照射抛物面反射镜,当抛物面反射镜的光轴与机械轴不重合时,反射光线的焦点运动。调整抛物面反射镜的中心和倾斜,使抛物面的光轴与机械轴重合,然后在卡氏系统的焦点处放置一十字分划板,经次镜和主镜的反射后,被内调焦望远镜接收,当次镜和主镜的光轴与机械轴都重合时,反射光线不动。运用该方法,在光学中心偏测量仪上,利用两个内调焦望远镜,完成了两台小F数卡氏系统的装调,抛物面主镜的倾斜不大于5.4″,双曲面次镜的倾斜不大于20.6″。该装调方法对格里高利等双反射系统同样适用。
A method to adjust the Cassegrain reflector was introduced. The focus of the parallel beam reflected by the hyperbolic mirror would move when its optical axis was not coincided with the mechanical axis. First, the hyperbolic mirror was aligned to make its optical axis coincided with the mechanical axis. Then, a cross reticle was put at the focus of the Cassegrain reflector. The beam was reflected by the secondary mirror and the primary mirror, then received by a internal focusing telescope. The beam would not move when the optical axises of the secondary mirror and the primary mirror were coincided with the mechanical axis. The adjustment of a Cassegrain reflector was finished on the optics centration error measuring instrument with two internal focusing telescopes by this method. The tilt of the first mirror was less than 5.4＂ and the secondary mirror was less than 20.6＂. This method can also be used in the adjustment of the dual-reflector system such as the Gregorian system.
出处
《红外与激光工程》
EI
CSCD
北大核心
2011年第9期1730-1733,共4页
Infrared and Laser Engineering
基金
国防预研项目
关键词
卡赛格林
定中心
中心偏测量仪
Cassegrain
centering optics
centration error measuring instrument
