Research advances on optical non-contact measurement of profiles

The accurate measurement to the surface outline, geometry dimension, various mould and free surface is an important step to improve the digitalization manufacture level of parts. The methods of optical non-contact measurement and the key technologies are discussed. The methods of optical non-contact measurement can be decided into two classes, they are passive method and active method. Different kinds of technologies for optical non-contact measuring are introduced. The key technologies and developing trend were discussed.