Development of a THz-TDS Scanner for Topographic Corneal Imaging

Topographic imaging of corneal tissue would be a prominent indicator of many ocular diseases. Using the time of arrival of a reflected THz beam from the surface, we develop a setup where depth profiles can be extracted from a spherical target. Topographic information associated with the contour of corneal tissue can be extracted, such as radius, surface height and thickness variations. In this study, we image several 3D printed spherical targets to determine the lateral and axial resolutions, and asymmetrical characteristics of our imaging system.