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arXiv 1807.08682physics.ins-detphysics.optics
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傅里叶变换红外光谱法测量室温附近的热辐射

Thermal-emission measurements near room temperature using Fourier-transform infrared spectroscopy

Yuzhe Xiao, Alireza Shahsafi, Chenghao Wan, Patrick J. Roney, Graham Joe, Zhaoning Yu, Jad Salman, Mikhail A. Kats

摘要:

由于存在来自实验装置和周围环境的组件的背景热发射,热发射体的准确表征可能具有挑战性。对于接近室温工作的发射器尤其如此。在这里,我们探讨表征近室温热发射器使用傅里叶变换红外(FTIR)光谱。我们发现,放置在分束器和检测器之间的FTIR光谱仪的光学元件所产生的热背景出现作为一个“负”的贡献傅立叶变换信号,导致在室温附近的热发射测量的错误。认识到这一贡献将有助于正确校准低温热辐射测量。

英文摘要:

Accurate characterization of thermal emitters can be challenging due to the presence of background thermal emission from components of the experimental setup and the surrounding environment. This is especially true for an emitter operating close to room temperature. Here, we explore characterization of near-room-temperature thermal emitters using Fourier-transform infrared (FTIR) spectroscopy. We find that the thermal background arising from optical components placed between the beam splitter and the detector in an FTIR spectrometer appears as a "negative" contribution to the Fourier-transformed signal, leading to errors in thermal-emission measurements near room temperature. Awareness of this contribution will help properly calibrate low-temperature thermal-emission measurements.

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