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.