【摘要】 研究了半导体氧化物ＳｎＯ２膜及其掺杂薄膜的光谱透过率气敏特性，导出了光波在固体介质中传播时的光折射率、消光系数、吸收系数的表示式，以及在“空气—薄膜—玻璃”三元系统中光透过率的近似表达式；解释了气敏使半导体氧化物薄膜系统光透过率变化的原因。所有这些结果与解释，与我们的实验结果相一致，也与一些文献报导的实验结果相符合［１，２］。更多还原

【Abstract】 This paper studies spectral transmittance and gas sensitive characteristics of SnO 2 and its doped films,gives expressions of refractivity.extinction and absorbent coefficient of light waves travelling through solid medium and an approximate expression of light transmiting gas film glass system,explains why gas sensitivity makes fractral transmittance of semiconductive oxide film changeable.The results coincide with those from our experiments and some references .更多还原