The magnetooptic self-nulled ellipsometer,with ac Farady magnetooptic modulating and phase locking to detect nulled point,has the high abilities of prevent interference and angular recognize.

磁光调制偏仪采用交流法拉第磁光调制及敏检波来检测消光点,具有抗干扰能力强,分辨能力高等优点。