Line-field swept source optical coherence tomography system for evaluating micro structure of objects in near infrared spectral range

摘要

Peculiarities of optical design for optical coherence tomography (OCT) system with illumination by a swept-source in the spectral range 1.26-1.36 μ.m are considered. In the OCT system, an object is illuminated by light intensity distribution in the form of line providing high power efficiency of the light source when evaluating micro structure of objects. A line-array photo detector with the frame acquisition rate of a few tens of kilohertz is utilized that allows obtaining B-scans without mechanical lateral scanning. The illumination power density at each point of investigated object is much less with respect to conventional "flying spot" methods that is important when studying biological objects not resistant to intensive light. Results of experimental investigations utilizing the Linnik micro interferometer optical scheme are given. Experimental tomograms of different objects are presented.