摘要：Acquisition of physical data with high precision is a key step in reverse eng.neering.(RE). It is an important stimulative for the progress of reverse eng.neering.with which various digitizing.devices are invent ed, developed and made applicable. This paper introduces a three dimensional opt ical measurement method based on digital fring. projection technique in RE to im prove the technique through its application. A practical example is presented an d the result demonstrates the applicability and feasibility of the measurement s ystem as well as the reliability and validity of relevant methods and algorithms .