The path equation of the light in self focusing optical fibre is derived in this article. The essential of the self focusing is clarified.
推导了自聚焦光导纤维中光线传播的路径方程，阐明了自聚焦作用的物理实质。
The paper presents the constitutional characteristics of the new mechanism of the symmetric curves with the single axis and analyses the path equation and its solutions.
本文阐述了单轴对称曲线新机构的构成特点，分析了轨迹方程及其解析法。
Starting from the ray path equation, object-image relationships are found and used to determine the equivalent focal length and the principal planes of tapered GRIN fiber.
本文从光线轨迹方程出发，推导了锥形梯度折射率纤维的物像关系式，并得出了它的等效焦距和主平面位置。
The profile equation of brake cam of DD680 series motor vehicles and tool path equation for processing copying cam have been obtained by using analytical theory of cam mechanism.
利用凸轮机构的分析理论，获得了加工DD680系列汽车制动凸轮的轮廓曲线方程和加工该靠模凸轮的刀具中心轨迹方程。
The profile equation of brake cam of DD680 series motor vehicles and tool path equation for processing copying cam have been obtained by using analytical theory of cam mechanism.
利用凸轮机构的分析理论，获得了加工DD680系列汽车制动凸轮的轮廓曲线方程和加工该靠模凸轮的刀具中心轨迹方程。
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