| Summary: | 碩士 === 國立交通大學 === 機械工程系所 === 105 === This paper focus on the studies and applications of varifocal lens on micro scale non-contact 3D coordinate measurement. First of all, the stability, resolution and another character of this system were investigated through several arranged experiments. In the proposed experimental system, the focal length of the optical device was afforded by changing the curvature of varifocal lens by specified driving current. In this way, this system can vary its focal length to determine focus position and achieve the data of distance under measured. According the characteristics analyzed in the first part of this study. This paper proposes a measurement method of fast scan based on the concept of curve fitting technology under this architecture. The performance of this method was then evaluated and demonstrated the beneficial effect that the scanning speed can be increased in many times. Since that, the 3D scan measuring processes was thus could be expected.
The second part, the architecture of system was changed. The performance of new system was evaluated again. According to the experimental results, the speed of measurement under the new architecture is 200 times more than the original architecture. In addition, the resolution can be increased with the new optical fiber introduced. As demonstrating results, examples of fast scan of three dimensional surface profile in step-height sample and Spherical mirror are presented as a reference.
|
|---|
