| 光谱仪透射测定 |
| 添加时间：2020/8/3 14:39:48 浏览次数： |
| 光谱仪透射测定 Transmission measurement of spectrometer 光谱仪的透射率或它的效率可用辅助单色仪装置来测定。在可见和近紫外实现这些测量没有任何困难。测量通过第一个单色仪的光通量，紧接着测量通过两个单色仪的光通量，以这种方式来确定第二个单色仪的透射率。 The transmittance or efficiency of the spectrometer can be measured by an auxiliary monochromator. There is no difficulty in realizing these measurements in visible and near ultraviolet. The transmittance of the second monochromator is determined by measuring the luminous flux through the first monochromator and then by measuring the luminous flux through the two monochromators. 绝对测量需要知道单色仪的绝对透射率：对于相对测量，以各种波长处的相对单位可以测量透射率。真空紫外线的这些测量有相当大的实验困难，因此通常使用辅助单色仪。在各种入射角的情况下分别测量衍射光栅的效率。在许多实验步骤中已成功地避免了校准上的困难。 Absolute measurement needs to know the absolute transmittance of monochromator: for relative measurement, transmittance can be measured in relative units at various wavelengths. These measurements of VUV have considerable experimental difficulties, so an auxiliary monochromator is usually used. The efficiency of diffraction grating is measured under different incident angles. The difficulty of calibration has been successfully avoided in many experimental steps. 曾经研究过光栅效率与波长、入射角、镀层厚度、镀层材料以及其它因素的关系。所有这些测量都指出，在许多情况下能量损失是非常显著的，并且光栅的效率低于1%，光栅的不同部分可能有明显不同的效率。 The relationship between grating efficiency and wavelength, incident angle, coating thickness, coating material and other factors has been studied. All these measurements indicate that the energy loss is very significant in many cases, and the efficiency of the grating is less than 1%. Different parts of the grating may have significantly different efficiency. |
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