2013•Applied Mechanics and MaterialsRequires access
Laser Shearing-Interferometry for Measurement of Rail Straightness Accuracy and Error Analysis
Sen Li
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Abstract
A long rail straightness measurement method is given for the portable laser alignment measurement system which is based on laser shearing interference fringes. Through theoretical derivation, mathematical model is set up between the laser phase differential linearity error and shearing interferometry. Large numbers of experiments have verified correctness of long rail straightness measurement method, analyzed the cause of error and provided ways for error reduction.