CAJ | 학술논문

传统形式的挡光环是将挡光环与遮光罩内壁垂直设置,文中设计的新型挡光环是将挡光环与遮光罩内壁倾斜设置,使入射杂光的反射光线和一部分散射光线在挡光环与遮光罩内壁所夹的空间内多次衰减无法出射,剩余的散射光线也大多逆向光学系统传播,大大消弱了到达探测器的杂散光.新型挡光环的倾角α要始终保持α＞β(β为入射杂光与遮光罩内壁的夹角)的分布,才能避免一些照射到挡光环表面上的杂散光直接散射进入光学系统.文中以探测微弱星体的卡塞格林空间相机为例,在外遮光罩内部分别设置2种构型的挡光环,用Tracepro软件进行建模与仿真,结果表明:采用新型挡光环的空间相机与采用传统型挡光环的空间相机相比,其探测的星等提高了4个等级.
전통형식적당광배시장당광배여차광조내벽수직설치,문중설계적신형당광배시장당광배여차광조내벽경사설치,사입사잡광적반사광선화일부분산사광선재당광배여차광조내벽소협적공간내다차쇠감무법출사,잉여적산사광선야대다역향광학계통전파,대대소약료도체탐측기적잡산광.신형당광배적경각α요시종보지α＞β(β위입사잡광여차광조내벽적협각)적분포,재능피면일사조사도당광배표면상적잡산광직접산사진입광학계통.문중이탐측미약성체적잡새격림공간상궤위례,재외차광조내부분별설치2충구형적당광배,용Tracepro연건진행건모여방진,결과표명:채용신형당광배적공간상궤여채용전통형당광배적공간상궤상비,기탐측적성등제고료4개등급.
The traditional vane plumbs with the inside surface of a baffle,but the new-style vane designed in this paper inclines toward the inside surface of a baffle.The reflective light from the incident parasitic light and part of the stray light is blocked in the interbedded space of the new-style vanes and inside surface of baffle to be attenuated,and most of the residual light is retro-transmitted to the optic system,so just tiny stray light is able to arrive at the detector.The inclining angle α of the new-style vane must keep the distribution that α is bigger than β which is the included angle of the incident stray light with the baffle.Only by the distribution can the inclining stray light be avoided to arrive at the optic system directly.Taking the Cassegrain space camera as an example,two types of vanes were set up respectively within external baffles of the two cameras,and then the modeling and simulation for the two structures were performed by the aid of Tracepro software.The results show that the space camera with the new vane is 4 grades higher than that with the traditional vane.