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首页> 外文期刊>Applied optics >Response of Fourier-transform spectrometers to absorption and emission in a homogeneous single-layered beam splitter
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Response of Fourier-transform spectrometers to absorption and emission in a homogeneous single-layered beam splitter

机译：均匀单层分束器中傅里叶变换光谱仪对吸收和发射的响应

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摘要

Thermal self-emission contributes to interferograms measured with Fourier-transform infrared spectrometers. If the beam-splitter is almost transparent, the complex spectral amplitude that is due to the detector port emission is opposite that of the input port, whereas the amplitude that is due to the beam-splitter emission is in quadrature. The situation of an absorbing beam splitter is examined here. The volume beam-splitter emission is modeled by a superposition of dipole sources spread in an absorbing film. Angular polarization correlations are taken into account. It is found that the phase relations between the complex spectral amplitudes are affected. Numerical data are given for experimental conditions adapted to those of the airborne limb sounder MIPAS-FT.
机译：热自发射有助于通过傅立叶变换红外光谱仪测得的干涉图。如果分束器几乎是透明的，则归因于检测器端口发射的复谱振幅与输入端口的复谱振幅相反，而归因于分束器发射的振幅呈正交。在此检查吸收分束器的情况。体积分束器发射是通过在吸收膜中散布的偶极子源的叠加来建模的。考虑到角极化相关性。已经发现，复杂频谱幅度之间的相位关系受到影响。给出了适用于机载肢体测深仪MIPAS-FT的实验条件的数值数据。

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