Orientation of single crystal with high-accuracy polarimeter

摘要

Abstract: A null-polarimetric method for the orientation of single crystals is developed based on the use of a high-accuracy null-polarimeter. The principles of accurate polarimetric measurements are discussed. The origins of the systematic instrumental errors due to imperfection of polarizers are analyzed. Analytical relationships are derived for the characteristic azimuths of both the incident and the emergent from crystal lights. The fitting of those data allows us to orientate crystals with the accuracy of about 10$+$MIN@5$/ rad. The working procedures of orientation and the relevant experimental set-up are described. !23