Methods, systems, and computer program products for performing real time quadrature projection based FDOCT are disclosed. According to one method, a plurality of interferogram signals is phase shifted. A Fourier transform is applied to each of the plurality of interferogram signals. Depth dependence of the plurality of transformed interferogram signals is then removed. A real quadrature component and an imaginary quadrature component for each of the plurality of transformed interferogram signals are subsequently calculated. The real quadrature components of the transformed ' interferogram signals are combined to obtain a derived real component and the imaginary quadrature components of the transformed interferogram signals are combined to obtain a derived imaginary component. A full-range depth profile of the object is constructed by adding the derived real component to the product of the derived imaginary component and a scaling factor. A full-range depth image of the object is then generated using the full-range depth profile.
METHODS, SYSTEMS, AND COMPUTER PROGRAM PRODUCTS FOR PERFORMING REAL-TIME QUADRATURE PROJECTION BASED FOURIER DOMAIN OPTICAL COHERENCE TOMOGRAPHY