入射角度不敏感型石英光双折射滤波器

为了实现石英光滤波器中心波长随角度变化不敏感的目的,利用石英光滤波器绕着平行于或垂直于石英光轴的方向旋转时,石英光滤波器输出中心波长漂移方向不同的原理,提出了一个新型的两级改进型的Lyot石英光滤波器滤波的方法,并进行了相关理论分析和实验验证。结果表明,当入射角小于18时,这个新型的光滤波器的中心输出波长的确对入射角度的变化不敏感。该结论与相关的实验结果是相符合的。

Quartz birefringent optical filters insensitive to incident angles

In order to achieve a quartz filter insensitive to incident angles, based on the principle that the shifting direction of output central wavelength of a quartz birefringent optical filter is different when the filter rotate around an axis parallel and perpendicular to the quartz optical axis, a new type of two-stage modified Lyot quartz filter was presented. After theoretical analysis and experimental verification, the results show that the central wavelength of this new type filter is actually insensitive to the incident angles less than 18. The conclusion is in good agreement with the experiment results.