Abstract
We propose and demonstrate an OCT optical probe using eccentric optics. This probe enabled both forward imaging and side imaging by dividing a circular scanning area into two semicircular scanning areas using an external motor to rotate the flexible tube. The outer diameter of the probe was 2.6mm, and its rigid portion length was 10mm. The lateral resolution was 23μm, and the eccentric radius was 1.1mm. The circumferential length in scanning was 6.9mm, and the working distance was 5mm. OCT images of 1.5mm×6.9mm (in tissue, axial × circumference), including forward image and side image, were measured with the axial resolution of 19μm in air and a frame rate of one frame per second. The epidermis, dermis, and sweat gland of in vivo human ventral finger tips were observed.
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