Yin Ganghua, Zhao Yuejin, Dong Liquan, Jia Qian, Zhu Weiwen, Kong Lingqin, Liu Xiaohua, Ding Lin, Yu Xiaomei, Jin Yufeng
School of Optoelectronics, Beijing Institute of Technology, China.
Appl Opt. 2012 Feb 10;51(5):669-75. doi: 10.1364/AO.51.000669.
This paper presents a novel filtering method with a double triangular prism in an optical-readout thermal imaging system. First, the working principle of this system is described in detail, followed by the analysis of sensitivity. Then, infrared images of hands are obtained. On the basis of the analysis, it is concluded that this filtering method, whose noise equivalent temperature difference (NETD) can reach 145 mK, is effective in obtaining high-quality images. Finally, comparing the filtering method with a knife-edge filter, we can draw the conclusion that the filtering method can effectively improve image quality (the value of NETD is less than that of a knife-edge filter).
本文提出了一种在光学读出热成像系统中采用双三角棱镜的新型滤波方法。首先，详细描述了该系统的工作原理，接着分析了灵敏度。然后，获取了手部的红外图像。基于分析得出，这种滤波方法的噪声等效温差（NETD）可达145 mK，在获取高质量图像方面是有效的。最后，将该滤波方法与刀口滤波器进行比较，我们可以得出结论，该滤波方法能有效提高图像质量（NETD值小于刀口滤波器）。
