Double triangular prism filter based on the optical-readout method in a microelectromechanical infrared imaging system

Ganghua Yin, Yuejin Zhao, Liquan Dong*, Qian Jia, Weiwen Zhu, Lingqin Kong, Xiaohua Liu, Lin Ding, Xiaomei Yu, Yufeng Jin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

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).

Original languageEnglish
Pages (from-to)669-675
Number of pages7
JournalApplied Optics
Volume51
Issue number5
DOIs
Publication statusPublished - 10 Feb 2012

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