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《Equipment for Geophysical Prospecting》 2007-01
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Theoretical research of unsymmetrical grating seismic geophone based on the Moiré fringe multiplication technology

Li Shuqing, Wang Guanya and Liu Qingkui.  
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 moiré 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.
【CateGory Index】: P631.43
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