... symmetrical beam 对称束 symmetrical lens 对称透镜 synchronous excitation spectroscopy 同步激发光谱学 ...
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... 对称消光 symmetrical extinction 对称式透镜 symmetrical lens 等倾摄影片 symmetrically tilted photograph ...
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rapid symmetrical lens 快速对称透镜
two symmetrical lens apart 双分离透镜
symmetrical doublet lens 对称式双组镜头
symmetrical achromat lens [光] 对称式消色差透镜
symmetrical camera lens 对称型镜头
symmetrical electrostatic lens 轴对称静电透镜
With regard to image center, pixels′ distribution on image plane is still symmetrical even under the influence of lens distortion.
其中直接光学方法根据因镜头畸变造成的像素点在像面水平和垂直两个方向上分布的对称性得到图像中心；
The five points difference method is used to calculate the voltage distribution on the meridian surface of axial-symmetrical electrostatic lens.
采用五点差分法计算轴对称静电透镜子午面上电位分布，再从普遍轨迹方程求得的电子轨迹出发得到透镜焦点和球差。
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