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介绍了在狭缝超光谱成像仪中的重要作用。推导出在温度水平变化时,狭缝宽度尺寸的变化对超光谱成像仪光谱带宽与信噪比的影响,得到了超光谱成像仪狭缝的热光谱特性。比较了两类常见狭缝的热光谱特性,得出热特征尺寸与其导热率乘积越小的狭缝热光谱特性也越好的结论。
The important role in slit hyperspectral imagers is introduced. The influence of the variation of the slit width on the spectral bandwidth and the signal to noise ratio of the hyperspectral imager is deduced when the temperature level changes. The thermal spectral characteristics of the slit of the hyper-spectral imager are obtained. Comparing the thermal spectral characteristics of two kinds of common slits, it is concluded that the smaller the product of the thermal characteristic size and the thermal conductivity, the better the thermal spectral characteristics of the slit.