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有关光电光谱分析仪器的光学系统,曾在一些文献中作了介绍。但是,不论是用棱镜或衍射光栅作色散元件而制成的真空或非真空的分光计,都具有一个共同点:就是用光电接收元件取代了摄谱分析中使用的感光板,也就是在摄谱仪的焦面上安装所需测定元素的出射狭缝,并将出射狭缝所接收的幅射光经外部光学系统照射到光电倍增管的光阴极上。出射狭缝的数目根据分析对象不同而定,一般由几个到几十个。出射狭缝的设置和调整是保证光电光谱仪具有高度稳定性的主要因素之一。几年来我们从事光电光谱分析工作,对光电光谱仪有些了解,对于设置和调整出射狭缝有些体会,为互相学习,推进光电光谱分析工作的发展,简单介绍如下:
Optical systems for optical spectroscopy have been described in a number of documents. However, both vacuum or non-vacuum spectrometers, made of prism or diffraction grating as dispersive elements, have one thing in common: the photoreceiving element has replaced the plate used in the spectroscopic analysis, that is, The spectrometer's focal plane is equipped with an exit slit for the desired element to be measured and the radiation received by the exit slit is radiated to the photocathode of the photomultiplier tube via an external optical system. The number of exit slits according to the analysis of different objects, usually from a few to dozens. The setting and adjusting of the exit slit is one of the main factors to ensure the high stability of the photoelectric spectrometer. Over the past few years we engaged in the photoelectric spectrum analysis, some understanding of the photoelectric spectrometer, for setting and adjusting the exit slit some experience, to learn from each other to promote the development of photoelectric spectroscopy, a brief introduction is as follows: