Macqueen R M
Appl Opt. 1968 Jun 1;7(6):1149-54. doi: 10.1364/AO.7.001149.
A stratospheric balloon-borne coronagraph operating at wavelength 2.2 micro has been successfully flown in order to observe the outer solar corona. The system employed external occultation with three straight edges, and the Lyot portion was axial. Scanning of the corona was accomplished through rotation of the rear Lyot section about a diameter of the primary objective lens. A description of the origins of stray light in the instrument is given, and measurements at wavelengths 0.5 micro, 0.8 micro, and 2.2 micro presented. A wavelength dependence of the scattered light from the objective lens is deduced. Some details of the detection system and solar tracking are discussed.
一个工作波长为2.2微米的平流层气球搭载日冕仪已成功升空，用于观测太阳外层日冕。该系统采用带有三条直边的外部掩星法，且利奥滤光片部分为轴向。通过使后利奥滤光片部分绕主物镜的直径旋转来完成对日冕的扫描。文中给出了该仪器杂散光来源的描述，并展示了在0.5微米、0.8微米和2.2微米波长处的测量结果。推导出了来自物镜的散射光的波长依赖性。还讨论了探测系统和太阳跟踪的一些细节。
