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。
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.
这成为可能，包括一个浮动元素，具有独特的折射特性的特殊玻璃类型的使用因素，并与非球面表面的元素数。
This is made possible by a number of factors including the use of a floating element, special glass types with unique refraction properties, and elements with aspherical surfaces.
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