Fastie W G, Kerr D E
Appl Opt. 1975 Sep 1;14(9):2133-42. doi: 10.1364/AO.14.002133.
The problems associated with making accurate spectroradiometric measurements in the far uv region are sketched briefly. The equipment and methods that were developed for providing absolute sensitivity calibration of an Apollo 17 far uv spectrometer are described. The absolute reference standards were photoelectric diodes calibrated at the National Bureau of Standards. A complete vacuum optical facility, which included a premonochromator and stable uv light sources, was developed to calibrate the Apollo 17 instrument, and it has been used for a number of other tasks. Absolute radiometric calibrations between about 1200 A and 1700 A were performed with an absolute accuracy of +/-10%. The light source, which was designed to provide a very stable light output, is a low-pressure molecular hydrogen lamp in which the pressure is stabilized by thermal control of uranium hydride powder. Individual emission lines of the Lyman molecular band system of H(2) are used for calibration purposes. The lamp also copiously emits the 1215.7-A line (Lyalpha) of atomic hydrogen.
简要概述了在远紫外区域进行精确光谱辐射测量所涉及的问题。描述了为阿波罗17号远紫外光谱仪提供绝对灵敏度校准而开发的设备和方法。绝对参考标准是在美国国家标准局校准的光电二极管。为校准阿波罗17号仪器开发了一套完整的真空光学设备，其中包括一个前置单色仪和稳定的紫外光源，并且该设备已用于许多其他任务。在约1200埃至1700埃之间进行的绝对辐射校准，绝对精度为±10%。设计用于提供非常稳定光输出的光源是一种低压分子氢灯，其中通过氢化铀粉末的热控制来稳定压力。H₂莱曼分子带系的各个发射线用于校准目的。该灯还大量发射原子氢的1215.7埃线（莱曼α线）。
