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Optics
branch of physics
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Starting from Collins integral formula, the focusing characteristics of Gaussian beams passing through
a
bifocal lens are studied
从柯林斯积分公式出发,研究了高斯光束通过双焦透镜后的聚焦特性
The electron microscope uses
a
beam of electrons to produce images at high magnifications
电子显微镜利用电子束形成高倍影像
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