Study on shortwave infrared long-distance imaging performance based on multiband imaging experiments

Junwei Lang; Yueming Wang; Xizhong Xiao; Xiaoqiong Zhuang; Shengwei Wang; Jun Liu; Jianyu Wang

doi:10.1117/1.OE.52.4.045008

24 April 2013 Study on shortwave infrared long-distance imaging performance based on multiband imaging experiments

Junwei Lang, Yueming Wang, Xizhong Xiao, Xiaoqiong Zhuang, Shengwei Wang, Jun Liu, Jianyu Wang

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Optical Engineering, Vol. 52, Issue 4, 045008 (April 2013). https://doi.org/10.1117/1.OE.52.4.045008

Abstract

Balloon-borne or ground-based high resolution long range observation has extensive applications in border monitoring and area surveillance. Performance of long-distance oblique or horizontal imaging systems is closely related to the atmospheric transmittance of the observing spectral band. Compared with visible and near infrared, the shortwave infrared (SWIR) band benefits from less scattering effects, which enables it to provide better quality images under harsh atmospheric conditions. We present a signal-to-noise ratio (SNR) model including atmospheric influences. Based on the model, image SNR was calculated in the spectral range of 0.4 μm to 2.5 μm. In order to validate the imaging performance model of SWIR, a multi-band camera was designed and spectral imaging experiments were conducted. The results clearly demonstrated the advantage of SWIR imaging. The experiments show that the contrast and SNR of SWIR images reduced insignificantly for long distances and under low visibility conditions. This advantage makes SWIR multiband cameras suitable for long-distance remote sensing and for observing through haze.

CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Junwei Lang, Yueming Wang, Xizhong Xiao, Xiaoqiong Zhuang, Shengwei Wang, Jun Liu, and Jianyu Wang "Study on shortwave infrared long-distance imaging performance based on multiband imaging experiments," Optical Engineering 52(4), 045008 (24 April 2013). https://doi.org/10.1117/1.OE.52.4.045008

Published: 24 April 2013

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