Theoretical analysis of error induced by laser scanning spherical eccentricity

In order to study the effect on the laser scanning accuracy because of a certain eccentricity between the laser scanning center and the spherical test center during the measurement, after setting up a mathematical mode and deducing a calculation formula, the laser scanning deviation caused by eccentricity e was analyzed theoretically. The relationship of the several effect factors of laser scanning contour deviation was analyzed. The conclusion was reached that that eccentricity error does not exceed 2e with the increase of radius R. The results show that the impact of eccentricity e on the laser scanning contour deviation can be reduced after both the axes of the scan center and the measured spherical center are transformed to the same coordinate system equivalently.