Optical coherence tomography system

The invention relates to an optical coherence tomography system. The system comprises a light source, an optical fiber coupler, a lens group, signal acquisition equipment and signal processing equipment. The light source is used for emitting initial light; the optical fiber coupler is used for beam splitting of the initial light to obtain reference light and sample light; the lens group is arranged on an optical path between the optical fiber coupler and a to-be-tested sample; the sample light is transmitted to the lens group through optical fiber, is then incident to the to-be-tested sample through the lens group, and is reflected by the to-be-tested sample, thus obtaining sample reflected light; the sample reflected light passes through the lens group and undergoes interference with reference light so as to obtain interference light; the lens group is used for lowering the loss of the sample light; the signal acquisition equipment is used for probing the interference light to obtainan interference spectrum;