By taking the inverse design of auto steering pole envelope as an example,the 3D optical scanner was presented to collect the data of point cloud.

3D laser scanner and its effect factor analysis of surveying error;

Accoding to the characters of similar material model of mining subsidence,the model is observed by 3D laser scanner.

The orientating technology of the total station\'s traverse survey is introduced into the 3D Laser Scanner in order to solve the problem that the 3D Laser Scanner can not get the objects\' geodetic ordinates directly.

With the wide application of the three-dimensional laser scanner in engineering,this technology has attracted the attention of many researchers.

Then,this issue defined measurement accuracy of three-dimensional laser scanner measurement in engineering applications,preparing for final acceptance of the steel structure project by Three-dimensional laser scanner measurement.

Software design and implementation of 3D scanner;

This Paper implements a 3D Scanner prototype system that can scan one face of an object in 20 seconds.

Fundamental principle of surveying and technical index of 3D laser scanning imaging range-finder are expatiated in detail, Application scopes of instrument are also introduced in the paper.

Based on the functions of three-dimensional laser color scanner(3DLCS) developed by our research group and the practical require of police bullet identification,a new method called statistical algorithm based on grain distribution(SABGD) for automatic bullet trace detecting is given.