if the monochromator is used, usually, yes, you need a notch filter which rejects the stray light from laser. If double or triple spectrographs are used, the notch filter is not necessary.
second question: yes, for different wavelength laser radiation, you have to use different notch filter. You can check the transmittance curve to make the choice of filter.
我的社区
签到
【七月征文】不一YOUNG实验“猿”
报名开启：ICS2024第十三届光谱网络会议！
巡检超百家 丹纳赫集团参与第四届客户关怀季
推荐收藏！盘点中药材及饮片检测解决方案
