In this paper, model of aspherisation for higher-dioptry spectacle lens is investigated.

本文研究高屈光度眼用透镜消除离轴像散的面化模式。

The convex aspheric surface has self-aplanatic capability.The range that can be utilized in practice was studied.

分析了自消差方法检验凸二面的实际可用范围。

Concentric spheres are parallel.

同心面是平行的。

In the article we analyse the structure compose,the endure force status,the request of strength and stability on the domed bulkhead with nonaxisymmetry sphere-conical transitional annulated shell.

系统分析了带有轴称锥过环壳的面舱壁的结构组成、受力工况、强度与稳定性要求,用有限元方法数进行了强度优化与稳定性优化。

In this paper, we show that the Pseudo-Symmetric property of spherical point set can be characterized by the eigen values of eigenpolynomial and it has the closeness under the metric sum operation.

本文证明了面有限点集的伪称性可以完全由其特征多项式的根来刻画，并得到了在度量加运算下伪称性具有封闭性.