Surface Flatness Measurement Through a Digital 3D Profilometry System

Digital 3D profilometry is a non-contact, full-field, and fast method for 3D profile digitization. It has a relatively simple setup and acceptable measurement accuracy. Surface flatness plays an important role in many circumstances, such as sealing and contact. Using digital 3D profilometry to measure surface flatness is a new challenge to researchers. In this paper, new development is presented on how to measure surface flatness. Principles and procedures are described in detail. Measurement applications are given and limitations are discussed.