[The depolarization characteristic of quartz depolarizer in UV-VUV spectral region].
The quartz depolarizer consisting of two wedge-shaped quartz crystals was designed based on the Lyot depolarizer. The quartz depolarizer is used to reduce the polarization response of spectral instruments. The residual degree of polarization of the quartz depolarizer was derived by the method of matrix optics, so the variation regularity of its depolarization characteristic was analysed concerning its center thickness and the status of the incident radiation in the UV-VUV spectral range. Its depolarization effect was obvious for the radiation with some spectral bandwidth. Also, the depolarization characteristic of the quartz depolarizer was studied experimentally with 1-meter Seya-Namioka UV-VUV spectrometer, using LiF crystals as the polarizer and analyzer. The residual degree of polarization of the quartz depolarizer was less than 1%. Both the theoretical analysis and experimental results show that the quartz depolarizer we designed is appropriate to the spectral measurement with high accuracy.
Liu
Ying
Y
National Synchrotron Radiation Lab, USTC, Hefei, China.
Fu
Shao-jun
SJ
Li
Fu-tian
FT