The Triangulation Method of Contact-less Dimension Measurement Using an Area CMOS Imaging Sensor

摘要

The so-called triangulation method of contact-less dimension measurement determines the measured object's dimension from its shadow projected on an imaging sensor without lens. A point light source is used to illuminate the measured object. The so far used linear CCD sensors introduced a considerable uncertainty to the measurement. Application of area CMOS imaging sensors improves the measurement uncertainty and enables to use some new measurement methods. A special CMOS measuring camera was designed for this purpose.