Rapid reverse technology is one of the key technologies with which the enterprises
develop new product and occupy the market rapidly. How to realize the reverse measurement and
CAD geometry reconstruction rapidly and accurately is always the most important focus for the
researchers. Based on the laser scanning technology, the realization principle of the laser line
scanning measuring system is presented and the approaches to improve the precision are also
analysed in the paper. The self-adaptation adjustment of the probe position can move the light knife
image to the optimal imaging area of the CCD according to the calibration result, which will ensure
the measurement precision of the CCD image. With the inner velocity loop and outer position loop
feedback control, the simple axis position precision of the mechanical system can be controlled
within 5um. In order to pick up the points of the light knife centre rationally and exactly, the
reconstruction-disperse iteration algorithm is put forward. After processed by different iteration
times, the optimal points can be obtained. The reconstruction method of curve and surface based on
NURBS is also given. The paper presents the application and realization of the system at last, which
realizes the curve and surface measurement with high precision.
Super resolution laser line scanning thermography
