A high resolution spectrograph for the vacuum ultraviolet
A high resolution spectrograph for the vacuum ultraviolet
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高分辨率真空紫外光谱仪
DOI：
10.1016/0022-2852(57)90031-0
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发表时间：
1957
影响因子：
1.4
通讯作者：
P. Wilkinson
中科院分区：
文献类型：
--
作者：
P. Wilkinson
描述了采用每英寸 30,000 线凹面光栅的 21 英尺 Eagle 安装真空光谱仪的结构。在该仪器中，狭缝是水平的，板支架是垂直的，并且两者都偏离罗兰平面。这种安排最初是由哈里森设计的，非常方便，并且简化了疏散问题。双边狭缝可在不破坏真空的情况下进行调节，并提供可移动隔膜用于各种用途。新划定的光栅适用于 5000 至 6000A 区域，通常按照落在火焰上的真空紫外线的顺序使用。在第四阶中，倒数板色散为0.3A/mm并且观察到的分辨率约为300,000。板室呈圆柱形，有一个铝门，通过门的中心安装有用于操作暗盒的各种控制装置。简要描述了光学调节方法，并讨论了该领域特有的技术，如光源、级分离、低温工作和波长标准。通过许多室温和低温一氧化氮吸收光谱和原子氧发射光谱的照片证明了高分辨率。允许狭缝和板支架脱离罗兰平面的安装光学理论，根据 Beutler 给出的理论进行了讨论。这种处理方法已经过详细检查，并进行了一些修正和扩展。结果表明，如果离面角度保持在 1° 以下，则离面安装不会导致通常面内安装中未出现的新像差。
The construction of a 21-foot Eagle mounting vacuum spectrograph employing a 30,000 line per inch concave grating is described. In this instrument, the slit is horizontal, the plateholder vertical, and both are displaced from the rowland plane. This arrangement, originally designed by Harrison, is quite convenient and simplifies evacuation problems. The bilateral slit can be adjusted without breaking the vacuum, and a movable diaphragm is provided for various purposes. The grating, newly ruled and blazed for the 5000 to 6000A region, is normally employed in that order of the vacuum ultraviolet which falls on the blaze. In the fourth order the reciprocal plate dispersion is 0.3A/mm and an observed resolving power of about 300,000 has been obtained. The plate chamber is cylindrical and possesses an aluminum door through the center of which are mounted various controls for operating the cassette.The method of optical adjustment is described briefly and the techniques peculiar to this field such as light sources, order separation, low temperature work, and wavelength standards are discussed.The high resolving power is demonstrated by a number of photographs of room and low temperature absorption spectra of nitric oxide, and emission spectra of atomic oxygen. The optical theory of the mounting, which permits the slit and plateholder to lie off the Rowland plane, is discussed with respect to the theory given by Beutler. This treatment has been examined in detail and a number of corrections and extensions have been made. It is shown that the off-plane mounting causes no new aberrations not already present in the usual in-plane mounting provided that the off-plane angle is kept below 1°.