摘要
本文通过几何光学原理对“波带板激光准直”中旁折光影响进行了分析,得出了波带板激光准直不可能削弱旁折光影响的结论。这一结论对大坝水平位移观测方案的布设具有实际意义。
Usually in measuring horizontal displacement of large dams by sighting alignment, precision of measuring horizontal displacement is mainly dependent on pointing errors and the atmospheric effects. When alignment distance is longer than five hundred meters, the atmospheric effect on sighting alignment will become the main error source. Whether the atmospheric effect on laser aligenment in using the zone plate is smaller than on sighting alignment is a matter of controversy, In this paper, the author investigates the atmospheric effect on laser alignment in the use of the zone plate on the basis of the principles of geometrical optics and reaches the conclusion that the atmospheric effect on laser alignment in using the zone plate is as great as on sighting alignment. The conclusion is helpful to the arrangment of the measurement of the horizontal deformation of large dams.
出处
《武测科技》
北大核心
1989年第3期18-22,13,共6页
