转镜式干涉光谱仪中的误差容限研究

通过分析可知,转镜的晃动不影响干涉图的调制度,但会带来干涉图周期的变化.通过研究晃动带来干涉图的周期变化,可找到晃动的容限.结果表明：转镜式干涉光谱仪对转镜的晃动不敏感.用同样的方法可以确定转镜转速误差的容限,转镜对转速稳定性有着较高的要求.转镜式干涉光谱仪中的反射镜不是动件,安装时的倾斜对干涉图的调制度和相位都有影响,通过计算,这种影响可得到反射镜的倾斜容限.结果表明,转镜式干涉光谱仪对反射镜的安装准确度有很高的要求.

Studies of Error Limited of High Speed Rotary Specetrometer

The rotating refractor is an only movable object in high speed rotary spectrometer. Vibration always exists when spectrometer works. Analyzed results show that modulation depth is not affected by vibration, which can cause phase error. And the system is not sensitive to the vibration of rotating refractor. But rotary speed stability has to act perfectly. The reflecting mirrors are unmovable, which are very sensitive to tilting because tilting of mirrors can affect modulation and phase of nterferogram. As a result, the reflective mirrors are requested precision fitting.