The researches of this paper are very important and significative job to improve precision of servo-control system of three axis optical tracking test table even all type of electric simulator tables.
本论文的研究对于提高三轴光学跟踪试验转台以至于所有电动仿真转台的伺服控制系统的精度来说，是一项十分重要和有意义的工作。
The design characteristics are that center of the disk is not on optical axis, deviation of target is linear and continuous and azimuth information of target is given in orthogonal coordinate system.
该调制盘的设计具有调制盘的转动中心与光学系统的光轴不同心，连续线性反映目标的偏离量，以及以直角坐标方式给出目标的方位信息等特点。
The relation between the stress along the optical axis of trigonal crystallographic system and the refractive index is established.
运用折射率椭球分析晶体的弹光效应，给出了三方晶系沿光轴方向的应力与折射率的变化关系。
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