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常规的低成本、超宽范围的红外偏振仪存在不足之处。在复盖整个中红外和远红外光谱区上,只能提供线格栅器件,要覆盖整个光谱范围,需要用几个高成本的偏振仪,性能有限。现已证明,用半导体等级的硅(电阻率超过10Ω·cm、最好是悬浮区法、n型硅)能够构造适合于傅里叶变换红外光谱仪用的“玻片堆”偏振仪,它们可以应用于1.2μm至250μm。“光学等级”的硅不适合可靠地用于远红外区。这种偏振仪可用于部分激光器(He-Ne1.52或3.39μm线,CO,HF,DF和二极管),但是,不能于大功率的二氧化碳激光器。
Conventional low-cost, wide range of infrared polarizer deficiencies. In covering the entire mid- and far-infrared spectral regions, only wire grid devices are available, and to cover the entire spectral range requires several high-cost polarizers with limited performance. It has been demonstrated that “glass stack” polarizers suitable for use in Fourier transform infrared spectroscopy can be constructed using semiconductor grade silicon (resistivity in excess of 10 Ω · cm, preferably in suspension, n-type silicon) Applied to 1.2μm to 250μm. “Optical grade” silicon is not suitable for reliable use in the far infrared region. This polarimeter can be used with partial lasers (He-Ne 1.52 or 3.39 μm lines, CO, HF, DF and diodes) but not with high-power CO2 lasers.