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Proceedings Paper

Radiation characterization analysis of pushbroom longwave infrared imaging spectrometer
Author(s): Rongbao Shi; Yuheng Chen; Jiankang Zhou; Weiming Shen
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Paper Abstract

Noise equivalent temperature difference (NETD) is the key parameter characterizing the detectivity of infrared systems. Our developed pushbroom longwave infrared imaging spectrometer works in a waveband between 8μm to 10.5 μm. Its temperature sensitivity property is not only affected by atmosphere attenuation, transmittance of the optical system and the characteristics of electric circuit, but also restricted by the self-radiation. The NETD accurate calculation formula is derived according to its definition. Radiation analysis model of a pushbroom image spectrometer is set up, and its self-radiation is analyzed and calculated at different temperatures, such as 300K, 150K and 120K. Based on the obtained accurate formula, the relationships between the NETD of imaging spectrometer and atmospheric attenuation, F-number, effective pixel area of detector, equivalent noise bandwidth and CCD detectivity are analyzed in detail, and self-radiation is particularly discussed. The work we have done is to provide the basis for parameters determination in spectrometer system.

Paper Details

Date Published: 31 December 2013
PDF: 12 pages
Proc. SPIE 9042, 2013 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, 904217 (31 December 2013); doi: 10.1117/12.2037442
Show Author Affiliations
Rongbao Shi, Soochow Univ. (China)
Yuheng Chen, Soochow Univ. (China)
Jiankang Zhou, Soochow Univ. (China)
Weiming Shen, Soochow Univ. (China)


Published in SPIE Proceedings Vol. 9042:
2013 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments
Yongtian Wang; Xiaocong Yuan; Yunlong Sheng; Kimio Tatsuno, Editor(s)

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