Kirchner Sara, Narinsamy Sebastien, Sommier Alain, Romano Marta, Ryu Meguya, Morikawa Junko, Leng Jacques, Batsale Jean-Christophe, Pradère Christophe
1 124090 I2M TREFLE, UMR CNRS 5295, Esplanade des Arts et Métiers, Talence, France.
2 Epsilon-Fahrenheit, Esplanade des Arts et Métiers, Talence, France.
Appl Spectrosc. 2018 Feb;72(2):177-187. doi: 10.1177/0003702817736320. Epub 2018 Jan 9.
The purpose of this article is to present a new calibration procedure for spectroscopic measurements using an infrared focal plane array (IRFPA) spectrometer on highly opaque middle-wave infrared (MWIR) media. The procedure is based on the properties of the IRFPA camera and especially the integration time (IT), which is the main parameter that can be adjusted to control the sensitivity of the measurements. The goal of the paper is to experimentally validate this dependence with the direct reference intensity light coming out of the IR monochromator in order to predict the spectrum shape and intensity level in a range out of the camera saturation. This method allows determining spectrum used as background for transmittance calculation. It has been applied in the case of measurement of water transmittance, which is a highly opaque medium and whose measurement requires high ITs. The main result is the ability to take an IR spectroscopic imaging measurement through 300 µm of water and the determination of its transmittance with sufficient sensitivity due to the proposed calibration procedure. This procedure allows the possibility of transitory studies in heterogeneous aqueous media.
本文的目的是介绍一种新的校准程序，用于在高度不透明的中波红外（MWIR）介质上使用红外焦平面阵列（IRFPA）光谱仪进行光谱测量。该程序基于IRFPA相机的特性，特别是积分时间（IT），它是可调整以控制测量灵敏度的主要参数。本文的目标是通过来自红外单色仪的直接参考强度光对这种依赖性进行实验验证，以便预测相机饱和范围之外的光谱形状和强度水平。这种方法允许确定用作透过率计算背景的光谱。它已应用于水透过率的测量情况，水是一种高度不透明的介质，其测量需要高积分时间。主要结果是能够透过300μm的水进行红外光谱成像测量，并由于所提出的校准程序而以足够的灵敏度确定其透过率。该程序允许在非均相水性介质中进行瞬态研究。
