Abstract of Junho Shin's Paper
Experiment for the Calibration of
Liquid Crystal Variable Retarder
J. Shin, K. Shinoda and K. Ichimoto
ABSTRACT
We have performed the experiment for the calibration of two liquid crystal variable retarders using instruments for measuring the retardation. The data showed good qualities and the results of fitting were successful. Now it has become possible to use these two liquid crystals for the observation of the degree of polarization of the light from the Sun. It is planned that these retarders will be installed in the 25cm solar telescope at Norikura Observatory. We believe that the results with good accuracies enable us to get reliable data from real observations.