Mid-infrared speckle reduction technique for hyperspectral imaging

被引：1

作者：

Hjeij, Maroun ^{[1
]}

Poffo, Luiz ^{[1
]}

Billiot, Bastien ^{[2
]}

Le Page, Ronan ^{[1
]}

Besnard, Pascal ^{[1
]}

Goujon, Jean-Marc ^{[1
]}

机构：

[1] Univ Rennes, CNRS, FOTON Inst, UMR 6082, 6 Rue Kerampont, F-22300 Lannion, France

[2] Agro Innovat Int TIMAC AGRO, 18 Ave Franklin Roosevelt, F-35400 St Malo, France

来源：

OPTICS, PHOTONICS AND DIGITAL TECHNOLOGIES FOR IMAGING APPLICATIONS VII | 2022年 / 12138卷

关键词：

Mid infrared; hyperspectral imaging; speckle reduction; tunable laser;

D O I：

10.1117/12.2621817

中图分类号：

TP31 [计算机软件];

学科分类号：

081202 ; 0835 ;

摘要：

Recently, we proposed an active mid-infrared (MIR) hyperspectral imaging system for early detection of plant water stress. A quantum cascade tunable laser powered this stand-off detection system, in which "speckle" in images due to coherent nature of laser radiation. The speckle affects the spatial resolution of the images. In this article, we evaluate several speckle suppression methods suitable for the mid-infrared region. To quantify the reduction of speckle, we compare their spatial contrast. We combined optical techniques and showed their ability to reduce the speckle contrast from its initial value 0.41s down to 0.11, representing a 73% reduction.

引用

页数：5

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