Development of an ultra-high-speed 3D profilometer for real-time, kilohertz display volumetric imaging

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Three-dimensional (3D) optical metrology is of great importance to myriad applications. Among existingtechnologies, the structured light (SL) 3D profilometry based on a digital micromirror device (DMD) hasobtained increasing popularity owing to its flexibility and low cost. Despite the fast improvement in depthresolution and responding spectrum, the imaging and display speed of SL-based 3D profilometry has not keptpace, mainly due to two difficulties. First, current themes of single-shot sinusoidal fringe projection haveresidual noise and are subject to distortion induced by phase aberration. Second, the state-of-the-art high-speedcameras in existing SL-based 3D profilometers do not possess a sufficient data download speed.Ajile Light Industries (ALI) is Canada's leading DMD-based 3D profilometry designing and manufacturingcompany. ALI has been seeking novel methods to increase the volumetric rate of their AjileWARE 3D camerato kHz levels. At 2016 SPIE's Photonics West conference, ALI established a collaboration with Prof. Liang onthis topic. As an initial step to promote this university-industry partnership, this Engage application aims todevelop an ultra-high-speed 3D profilometer capable of single-shot, precise sinusoidal pattern projection andreal-time, continuous-streaming 3D imaging at kHz frame rates.The proposed project comes in the auspicious confluence of talents. Prof. Liang's group has extensiveresearch experience in imaging instrument designing, ultrafast 3D imaging, and DMD-based laser beamshaping. ALI will provide the 3D reconstruction software and their DMD controller system. Thecomplementary expertise, fully covering the knowledge scope of the project, will ensure the successful andprompt completion of the proposed project. It is envisioned that the developed profilometer will open newavenues in both scientific research and industrial applications. The generated knowledge and technicalknow-how will assist in future product development and technology transfer.