The article lays stress on describing mechanical assembling method of horizontal axial system 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。
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。
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.
本文提出了一种球面上基本几何元素的园弧投影变换方法，并建立了三轴及对应的二轴园弧投影体系。
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