考虑旋光影响的窄带声光滤波器设计及其性能分析

Design and Performance Evaluation of a Narrow Band Acousto-Optic Filter Considering the Rotatory Property

基于电信号调谐的声光可调滤波器具有宽光谱、快速调谐、大孔径角以及窄滤波线宽等特点。在考虑了二氧化碲晶体的旋光性的基础上,设计了一种非共线型声光滤波器。实验研究了该滤波器调谐关系以及不同中心波长的滤波线宽等性能。该滤波器的性能与理论预期符合较好。另外,结合倒置光学显微镜系统,搭建了超光谱显微成像实验系统,并进行了初步的超光谱显微成像实验研究,在可见光范围内获得了较好的超光谱成像结果。

Acousto-optic tunable filter has many merits such as, wide spectrum range, rapid tuning large aperture angle and narrow band pass and etc.. In this work, the authors design a noncolliner acousto-optic tunable filter considering the rotatory property of TeO2. Moreover, we evaluate the performance of the acousto-optic tunable filter theoretically and experimentally and the experimental results are in accordance with the theoretical expect. Also, this filter is used in hyperspectral microscopic imaging system combining with inverse optical microscope system and it is capable of detecting and mapping material with different ingredient monochromatically.