Gupta Neelam, Voloshinov Vitaly
U.S. Army Research Laboratory, 2800 Powder Mill Road, Adelphi, Maryland 20783-1197, USA.
Opt Lett. 2005 May 1;30(9):985-7. doi: 10.1364/ol.30.000985.
A compact UV hyperspectral imager can be designed with an acousto-optic tunable filter (AOTF) installed in front of an enhanced CCD camera. Tellurium dioxide (TeO2) is the most commonly used crystal for AOTFs from 0.4 to 4 microm. We conducted an experiment to determine the UV spectral response of an imaging TeO2 AOTF in tandem with a known KDP AOTF and obtained good-quality hyperspectral images by using the TeO2 filter down to 365 nm. We compared the performance of the TeO2 filter-based hyperspectral imager with an imager based on a KDP filter because currently the latter is the best available material for the UV, and we found the performance of the TeO2 imager in the range 355-480 nm to be superior to that of a KDP imager. We present our experiments and the results obtained.
可以设计一种紧凑型紫外高光谱成像仪，在增强型电荷耦合器件（CCD）相机前安装一个声光可调滤光器（AOTF）。二氧化碲（TeO2）是0.4至4微米波段AOTF最常用的晶体。我们进行了一项实验，以确定成像用TeO2 AOTF与已知的磷酸二氢钾（KDP）AOTF串联时的紫外光谱响应，并通过使用TeO2滤光器获得了低至365纳米的高质量高光谱图像。我们将基于TeO2滤光器的高光谱成像仪的性能与基于KDP滤光器的成像仪进行了比较，因为目前后者是用于紫外波段的最佳可用材料，我们发现TeO2成像仪在355 - 480纳米范围内的性能优于KDP成像仪。我们展示了我们的实验及所得结果。
