A High-speed Digital Laser Grating Projection System for the Measurement of 3-dimensional Shapes

作者：Park Yoon Chang^*; Park Chul Geun; Ahn Seong Joon; Kang Moon Ho; Ahn Seungjoon

来源：Journal of the Optical Society of Korea, 2009, 13(2): 251-255.

DOI：10.3807/JOSK.2009.13.2.251

• 3D shape measurement
• High-speed fringe projector
• Laser grating
• Phase shifting
• Gray code

In the non-contact 3-dimensional (3D) shape measurements, the fringe pattern projection method based on the phase-shifting technique has been considered very effective for its high speed and accuracy. The digital fringe projector in particular has great flexibility in generating fringe patterns since the patterns can be controlled easily by the computer program. In this work, we have developed a high-speed digital laser grating projection system using a laser diode and a polygon mirror, and evaluated its performance. It has been demonstrated that all the optical measurements required to find out the profile of a 3D object could be carried out within 31 ms, which confirmed the validity of our 3D measurement system. The result implies the more important fact that the speed in 3D measurement can be enhanced remarkably since, in our novel system, there is no device like a LCD or DMD whose response time limits the measurement speed.

• 出版日期2009-6