SU Shao-jing, LIU Hui, LU Hai-bao, WANG Yue-ke. Doppler analysis for double-grating displacement measurement s ystem with nanometer resolution[J]. Editorial Office of Optics and Precision Engineering, 2003,(1): 17-21
SU Shao-jing, LIU Hui, LU Hai-bao, WANG Yue-ke. Doppler analysis for double-grating displacement measurement s ystem with nanometer resolution[J]. Editorial Office of Optics and Precision Engineering, 2003,(1): 17-21DOI:
Doppler analysis for double-grating displacement measurement s ystem with nanometer resolution
Unlike other papers which listed the measuring equation only
and didn't touch t he operation principle
a double-grating displacement measurment system with a resolution of one nanometer is analyzed using Doppler theory in this paper. The optical structure of the gr a ting system is first shown in detail
the diffraction sequences are described in turn
a mathematic model of incident and emission light beam is then establishe d for Doppler effect
and finally the relationship between the displacement valu e and the corresponding Moir? signals is established with this model. The function of refere nce grating is ex plained
and the characteristics of this grating system are listed.
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Keywords
references
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