Kehlet Louis Martinus, Tidemand-Lichtenberg Peter, Dam Jeppe Seidelin, Pedersen Christian
Opt Lett. 2015 Mar 15;40(6):938-41. doi: 10.1364/OL.40.000938.
In this Letter, hyperspectral imaging in the mid-IR spectral region is demonstrated based on nonlinear frequency upconversion and subsequent imaging using a standard Si-based CCD camera. A series of upconverted images are acquired with different phase match conditions for the nonlinear frequency conversion process. From this, a sequence of monochromatic images in the 3.2-3.4 μm range is generated. The imaged object consists of a standard United States Air Force resolution target combined with a polystyrene film, resulting in the presence of both spatial and spectral information in the infrared image.
在本信函中，基于非线性频率上转换以及随后使用标准硅基电荷耦合器件（CCD）相机进行成像，展示了中红外光谱区域的高光谱成像。针对非线性频率转换过程，在不同的相位匹配条件下采集了一系列上转换图像。据此，生成了3.2 - 3.4微米范围内的单色图像序列。成像对象由一个标准的美国空军分辨率靶标与一层聚苯乙烯薄膜组成，从而在红外图像中同时存在空间和光谱信息。
