This paper is based on traditional non-contact optical triangle method asmeasuring theory, and the PSD is exploited as photoelectric converter.

Biomedical applications of laser triangulation;

Small object′s dimension measure and three-dimension reconstruction system based on laser triangulation;

Study on the Key Techniques for Autobody Parts Measurement with Laser Triangulation;

Firstly, the measuring principle of the optical triangulation is.

Based on the survey of the non-contact measuring method, the present research status of Position Sensitive Detector (PSD) and it s development trend, present dissertation developed a distance measuring system on the base of the comprehensive knowledge of optical triangle method and PSD s operating prin.

The principlesof optical triangle method and position sensitive device were explained, on the basis of which novel real timemeasuring system was developed giving optical path design and following processing ci.

A kind of virtual measuring apparatus for surface roughness was designed, which works based on oblique incidence laser trigonometry, developed in the software environment LabVIEW, realized with black-based design, and used in measuring surface roughness for high-precision plane non-destructively, rapidly and accurately.

A novel method for improving measuring accuracy in laser triangle method;

Its lateral vibration magnitude under the stochastic surface excitation of the maglev track and its effect on the measurement accuracy of the maglev track geometry parameters with the laser triangle method are studied.

This paper puts forward a novel micro-displacement sensor and introduces its working principle and structure, which uses laser triangle method and optical lever principle.