Spherical Aberration — causes light rays passing through a lens (or reflected from a mirror) at different distances from the optical center to come to focus at different points on the axis.
球差-使以不同孔径角穿过透镜(或从镜面上发射)的光线不能聚焦在轴上的同一点。
Spherical Aberration -- causes light rays passing through a lens (or reflected from a mirror) at different distances from the optical center to come to focus at different points on the axis.
球差-使以不同孔径角穿过透镜（或从镜面上发射）的光线不能聚焦在轴上的同一点。
The coherent output of a LDA has been achieved by a simple EC consisted of a commercial LDA, a fast axis collimation lens and an external mirror.
我们用一个普通的商用LDA、一个快轴准直透镜和一个外腔镜构成的简单外腔实现了LDA的外腔锁相运行。
The compensation relationships among the adjustable variables and those between surface errors and the adjustable variables in off-axis three-mirror system are analyzed.
分析了离轴三镜系统中光学元件调整变量间的补偿关系和面形误差与调整变量间的补偿关系。
The mirror of an astronomical telescope forms at its focal point an image of a star on the axis of the mirror.
天文望远镜把在镜轴上的星体成象在焦点上。
Based on a north-south mirror field, the equation for estimating the end losses was derived from analyzing the angle between incident sunlight and the tacking axis of a reflecting mirror.
基于南北向菲涅耳反射镜场，该文从分析入射太阳光线与反射镜单元跟踪轴线之间的夹角出发，导出了反射光线到达接收器时在南北向偏离的距离（即端部损失）的计算公式。
The symmetric values about the imaginary axis of zero-poles which the unstable process lies in the open and closed right-half plane are defined as their mirror-injection.
非稳定过程在开右半平面的零极点关于虚轴的对称值称为该零极点的镜像映射。
The basic factors affecting collimating characteristic are off-axis magnitude, effective aperture and emission position on the focal plane of off-axis parabolic mirror.
影响离轴抛物镜准直特性的主要因素有离轴量，有效孔径和焦面出射点的位置。
The importance of dynamic characteristic analysis of the four-mirror off-axis reflective spectrum imager is explained.
叙述了对离轴四反光谱成像仪进行动态特性分析的重要性。
The structural FEM model is set up for the ultra-thin mirror with support structure. PV and RMS values of the mirror with horizontal or vertical optical axis are gained.
建立结构模型，对带有支撑结构的超薄反射镜进行分析，得出在光轴竖直与水平两种状态下的PV和RMS值。
Optical system and structural composition of the four-mirror off-axis reflective spectrum imager are introduced.
介绍了离轴四反光谱成像仪的光学系统和结构组成。
Theory basis of dynamic characteristic analysis is simply described. Solid model and meshed model of the four-mirror off-axis reflective spectrum imager are described either.
简述了动态特性分析的基础理论，描述了离轴四反光谱成像仪的实体及有限元模型。
Theory basis of dynamic characteristic analysis is simply described. Solid model and meshed model of the four-mirror off-axis reflective spectrum imager are described either.
简述了动态特性分析的基础理论，描述了离轴四反光谱成像仪的实体及有限元模型。
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