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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 5 — Feb. 10, 2012
  • pp: 669–675

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, and Yufeng Jin  »View Author Affiliations

Applied Optics, Vol. 51, Issue 5, pp. 669-675 (2012)

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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).

© 2012 Optical Society of America

OCIS Codes
(100.2960) Image processing : Image analysis
(230.5480) Optical devices : Prisms
(040.6808) Detectors : Thermal (uncooled) IR detectors, arrays and imaging
(230.7408) Optical devices : Wavelength filtering devices

ToC Category:

Original Manuscript: October 11, 2011
Revised Manuscript: November 29, 2011
Manuscript Accepted: November 29, 2011
Published: February 10, 2012

Ganghua Yin, Yuejin Zhao, Liquan Dong, Qian Jia, Weiwen Zhu, Lingqin Kong, Xiaohua Liu, Lin Ding, Xiaomei Yu, and Yufeng Jin, "Double triangular prism filter based on the optical-readout method in a microelectromechanical infrared imaging system," Appl. Opt. 51, 669-675 (2012)

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