Encoder-based synchronization for ECOPS high-speed terahertz raster scanner

This article describes the encored based synchronization method for a terahertz time domain spectroscopy raster scanner build with the commercially available TeraFlash Smart platform. We used microcontroller with dedicated counter to combine synchronization signals from various devices included in the scanner. As a result, a fast scanning mode was obtained which is 25 times faster than classic step by step approach. The developed system is capable to scan a 500 x 500 mm sample with resolution of 1 mm in about 20 min.