常温下石英旋光晶体透射谱线的测试分析

为了研究常温状态下石英旋光晶体透射谱线,根据石英旋光晶体透射比的理论分析,采用UV-3101PC分光光度计实际测试,得到了300nm～1500nm波长范围特定厚度石英旋光晶体的连续透射谱线,并对所得谱线与理论结果进行了对比分析。结果表明,400nm以内由于石英晶体吸收比较明显,从而峰值透射比低于50%,由于旋光率随波长变化率很大,谱线周期很小;400nm～800nm之间峰值透射比60%,透射谱线的周期性及峰值个数受晶体厚度影响明显;波长大于1000nm时,由于旋光率随波长变化率很小从而谱线周期很大,并且谱线不规则,与石英材料波长选择吸收有关。

Analysis of transmission spectrogram of quartz rotary crystal at normal temperature

In order to study the transmission spectrum of rotary quartz at normal temperature, the spectrum within 300nm~1500nm was tested with a UV-3101PC spectrophotometer. Then the experimental result was compared with the theoretical one. The result shows that the peak transmittance is less than 50% among the range of 0nm~400nm, for the absorption of quartz crystal is obvious, and the spectrum cycle is small with the rotation rate changing with wavelength. The peak transmittance is 60% among the range of 400nm~800nm and the transmission spectrum cycle as well as the peak number is affected significantly by the crystal thickness. At wavelength larger than 1000nm, because rotation rate changes little with the wavelength, cycle of the spectrum becomes big and the spectrum is irregular due to selective absorption of the quartz material.