The optical and geometric properties of a class of generalized conics are presented. The study makes it possible to find in an original way several results of classical geometry and to connect numerous curves by a common law. Applications in geometric optics are envisaged, with the production of diopters, lenses or mirrors.

中文翻译：

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一类广义二次曲线的光学性质

提出了一类广义二次曲线的光学和几何性质。这项研究使得以原始方式找到经典几何的几个结果并通过普通定律连接大量曲线成为可能。设想在几何光学中的应用，生产屈光度、透镜或镜子。