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bo dai pian de she ji he zhi zao
Author(s): 
Pages: 29-30+19
Year: Issue:  1
Journal: Optical Technique

Keyword:  波带片光能分布高斯分布激光束准直测量光斑位相差透镜焦距基准线望远物镜;
Abstract: <正> 一、前言具有TEM00模式输出的He-Ne激光束,其光束横断面的光能分布近似于高斯分布,在一定条件下,在相当长的距离内各断面的分布是一致的,这样,能量分布中心的联线就构成了一条理想的直线,可作为准直测量中的基准线。近几年来,国内外相继在水准仪、经纬仪上采用了这一技术。
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