论文标题
在红外反射或传输光谱中校正热发射诱导的检测器饱和
Correcting thermal-emission-induced detector saturation in infrared reflection or transmission spectroscopy
论文作者
论文摘要
我们发现，使用傅立叶变换光谱仪使用温度依赖性红外光谱测量（即反射率或传输）可能会有很大的误差，尤其是对于使用客观镜头（例如，使用红外显微镜）进行了升高的样品温度和收集。由于测得的样品到达检测器的热发射而导致部分检测器饱和导致这些误差，从而导致非物理明显降低反射率或随着样品温度的升高。在这里，我们证明可以通过实施几个级别的光学衰减来纠正这些依赖温度的误差，从而使测得的反射率或透射率可以“收敛性测试”，因为热发射信号被降低，或应用校正因素可以通过观察样品没有预期的光谱区域来推断的校正因子，预计不会具有实质性的温度依赖性。
We found that temperature-dependent infrared spectroscopy measurements (i.e., reflectance or transmittance) using a Fourier-transform spectrometer can have substantial errors, especially for elevated sample temperatures and collection using an objective lens (e.g., using an infrared microscope). These errors arise as a result of partial detector saturation due to thermal emission from the measured sample reaching the detector, resulting in nonphysical apparent reduction of reflectance or transmittance with increasing sample temperature. Here, we demonstrate that these temperature-dependent errors can be corrected by implementing several levels of optical attenuation that enable "convergence testing" of the measured reflectance or transmittance as the thermal-emission signal is reduced, or by applying correction factors that can be inferred by looking at the spectral regions where the sample is not expected to have a substantial temperature dependence.
