入射到近轴球面上并与光轴(z 轴)的夹角很小的光线称为近轴光线。 设近轴光线与光轴的夹角为θ,则sinα≈α≈tanα,cosα≈1。(因为是近轴光线,α角很小,趋近于0。另外,通过光学系统之后,近轴光线可认为交于一点)。
只有在近轴光线条件下,平行光通过凸透镜才可近似聚焦于一点。
The parallel light rays of the prnicipal axis that approach a convex lens can converge to the focal point.
文章介绍了在近轴光线和近轴物条件下,利用对光线跟踪的矩阵方法成像的方法,并说明它在含反射的共轴系统中的应用。
This paper proposes a novel approach that forms image using matrix technique for ray trace, in the condition of axial ray and axial object.
本文研究一种等折射率面为旋转抛物面的梯度折射率纤维的光线传播和近轴成像特性。
The ray propagating and paraxial imaging characteristics of a GRIN fiber lens with constant refractive-index surfaces of revolution paraboloids are studied.
应用推荐