Conroy, R., Dorrington, A., Cree, M., Künnemeyer, R. & Gabbitas, B. (2006). Shape and deformation measurement using heterodyne range imaging technology. Proceedings on the 12th Asia-Pacific Conference on Non-Destructive Testing, Auckland, New Zealand, 5-10 November 2006 (pp.1-7). Auckland, New Zealand: NZNDTA.
Abstract
Range imaging is emerging as a promising alternative technology for applications that require non-contact visual inspection of object deformation and shape. Previously, we presented a solid-state full-field heterodyne range imaging device capable of capturing three-dimensional images with sub-millimetre range resolution. Using a heterodyne indirect time-of-flight configuration, this system simultaneously measures distance (and intensity), for each pixel in a cameras field of view. In this paper we briefly describe our range imaging system, and its principle of operation. By performing measurements on several metal objects, we demonstrate the potential capabilities of this technology for surface profiling and deformation measurement. In addition to verifying system performance, the reported examples highlight some important system limitations. With these in mind we subsequently discuss the further developments required to enable the use of this device as a robust and practical tool in non-destructive testing and measurement applications.
