基于莫尔条纹倍增技术的非对称光栅地震检波器的理论研究  

Theoretical research of unsymmetrical grating seismic geophone based on the Moiré fringe multiplication technology

作　　者：李淑清[1,2] 王冠雅[2] 刘庆葵[2] 

机构地区：[1]天津大学精仪学院,天津300072 [2]天津科技大学电子信息与自动化学院

出　　处：《物探装备》2007年第1期14-17,共4页Equipment for Geophysical Prospecting

摘　　要：本文提出了用非对称光栅代替原来的等栅距光栅来应用于光栅地震检波领域的设计思想,并对非对称光栅测振原理进行了分析,给出了非对称光栅衍射系统中莫尔条纹光强、相位变化与光栅振动幅度之间的关系,为采用非对称光栅实现基于莫尔条纹倍增的高灵敏度光栅地震检波器提供了理论依据。This paper proposes a designing idea that the symmetrical grating is replaced by the unsymmetrical grating, which is used in grating seismic prospecting domain. The principle using unsymmetrical grating to detect the seismic vibration is illustrated. The relationship between the light intensity and phase change of moir~ fringe and the grating vibration in the unsymmetrical grating diffraction system is presented. Which provides the theoretical bases for using unsymmetrical grating to realize the high-precision grating seismic geophone based on the Moiré fringe multiplication.

关 键 词：非对称光栅 地震检波器 莫尔条纹 傅立叶分析 

分 类 号：P631.43[天文地球—地质矿产勘探]