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.
出处
《物探装备》
2007年第1期14-17,共4页
Equipment for Geophysical Prospecting
关键词
非对称光栅
地震检波器
莫尔条纹
傅立叶分析
unsymmetrical grating, seismic geophone, moir
fringe, Fourier analysis
