High-speed spectroscopic imaging of corneas using compressed sensing in a single-pixel detector and spherical phase front matching

Curved biological surfaces such as the cornea, joins, and nose present a challenging imaging target for terahertz spectroscopy due to the difficulty collecting the reflected light. Additionally, the need to scan the THz beam point-by-point results in slow scans which are susceptible to motion artifacts, for instance, due to breathing. Here, we present a video-rate terahertz imaging system for imaging curved surfaces. We show how our recent techniques for scanning spherical surfaces can be combined with THz single-pixel imaging to produce a compressed sensing imaging system for spherical targets. This imaging system will use high-speed ECOPS terahertz trace acquisition to form video-rate images and can pave the way for clinical translation of THz technology for ophthalmological applications.