METHOD AND SYSTEM FOR OPTICAL COHERENCE TOMOGRAPHY EXPLOITING TRUNCATED SINGULAR VALUE DECOMPOSITION

An Optical Coherence Tomography (OCT) system (100) is provided. The OCT system comprises: a light source (105) configured to generate a coherent light signal having a wavelength that varies over time across a time interval; an optical interferometer (110) configured to divide the coherent light signal into a reference forward signal directed to a reference arm of the optical interferometer leading to a reference reflector (R), and into an operative forward signal directed to an operative arm of the optical interferometer leading to a target object (O); an optical detector (115) configured to detect an interference light signal generated by a combination of a reference return signal returning from the reference arm after reflection by the reference reflector (R) and an operative return signal returning from the operative arm after reflection by the object (O), and configured to generate a corresponding detected interference electrical signal indicative of the interference light signal; a processing unit (125) configured to: - receive from the optical detector (115) a sequence of electrical signal samples of the detected interference electrical signal collected in corresponding sample times within the time interval; - process the received electrical signal samples to calculate for each predetermined depth among a set of predetermined depths inside the target object a corresponding reflectivity value indicative of the reflectivity of the target object at said predetermined depth, so as to obtain a corresponding set of reflectivity values. The processing unit (125) is configured to calculate the reflectivity values of the set by calculating each reflectivity value as a corresponding summation of electrical signal samples each one weighted by a respective weight, wherein said weights corresponds to singular values obtainable by the decomposition of a coefficient matrix of a system of equations, each equation of the system expressing a relationship between one of the received electrical signal samples and at least one of the reflectivity values of the set, and wherein said summation involves a subset of the received electrical signal samples. L'invention concerne un système de tomographie par cohérence optique (OCT) (100). Le système OCT comprend : une source lumineuse (105) conçue pour générer un signal lumineux cohérent ayant une longueur d'onde qui varie dans le temps sur un intervalle de temps ; un interféromètre optique (110) conçu pour diviser le signal lu