3D imaging of Diamonds using Optical Coherence Tomography
Optical Coherence Tomography (OCT) is a 3D imaging technique that uses low coherence light source to detect back scattered light from samples with depth ranging.
Since its inception in the 1980’s it has found many applications, mostly in medicine, where it has become the standard technique for retinal scans in ophthalmology.
Here, we will discuss the challenges and opportunities encountered when trying to apply this technique to the problem of inspecting raw diamonds. We will introduce the basic principles of operation for a typical time-domain OCT system and present our enhanced implementation to improve image acquisition rate. We discuss the adaptation of our existing time-domain OCT setup to accommodate the special requirements of diamond imaging. We present initial results of our investigations on two raw diamonds and propose future approaches to improve performance.