The article lays stress on describing mechanical assembling method of horizontal axialsystem for 778 photoelectric theodolite arid the factors affecting assembling accuracy.
本文着重叙述778光电经纬仪水平轴系机械装配的方法及影响装配精度的因素。
2
Characteristics of the defocusing error signals are expressed in the terms of an off-axial detection system by geometric optics. The results are compared with experiment.
本文用几何光学描述了离轴探测调焦误差信号与系统参数的关系，并与实验结果进行了比较。
3
This paper presents a method of arc projective transformation of the fundamental geometric elements on a sphere, and sets up an are projective system for three axial and two axial correspondently.