计量学报2017，Vol.38Issue(4)：420-423,4.DOI:10.3969/j.issn.1000-1158.2017.04.08
光干涉绝对重力仪衍射修正
The Diffraction Correction for Interferometric Absolute Gravimeters
摘要
Abstract
Based on the operating principle of an interferometric absolute gravimeter, a deviation of the measured gravitational acceleration value introduced by Gaussian laser beam is analyzed.And then a practical method, 90/10 knife-edge method, to measure the beam waist radius for diffraction correction is presented and the relative value of diffraction correction is obtained.Experimental results indicate that the beam waist radius is 1.1586mm and the relative value of diffraction correction is 7.56×10-9.The solution to determine diffraction correction applies to every interferometric absolute gravimeter.关键词
计量学/绝对重力仪/光干涉重力测量/衍射修正Key words
metrology/absolute gravimeter/interferometric gravity measurement/diffraction correction分类
通用工业技术引用本文复制引用
李春剑,粟多武,吴书清,冯金扬,徐进义..光干涉绝对重力仪衍射修正[J].计量学报,2017,38(4):420-423,4.基金项目
科技部平台项目(APT1301) （APT1301）
国家质量检验检疫总局技改量传项目(AJG-1403) （AJG-1403）
中国计量科学研究院基本科研业务费项目(AKY1406-14) （AKY1406-14）
