In order to realize synthetic coaxiality measurement for position deviations and angle deviations simultaneously

a laser beam-spot receiver system consisting of a receiver lens

beam splitter prisms

and CCD based on laser collimation was established. The triangular relationship among the lens optical axis

laser beam axis

and CCD was used to calculate those two deviations. In addition

a calculation method for obviously reducing the effect of lens’ error on optical aberration was presented. The theoretical and experimental data indicate that

for a system with position measurement range of ±10 mm

angle measurement range of ±2°

the receiver lens’ focal length of 50 mm

and the CCD’s size is 1.6 cm

the position measurement accuracy is 0.02 mm and the angle measurement accuracy is 9.5″. As a result

this system can meet the requirement of coaxiality measurement in lots of mechanical devices.