  In numerous applications, Fourier-domain optical coherence tomography
(FD-OCT) suffers from a limited imaging depth due to signal roll-off, a limited
focal range, and autocorrelation noise. Here, we propose a parallel full-field
FD-OCT imaging method that uses a swept laser source and an area camera in
combination with an off-axis reference, which is incident on the camera at a
small angle. As in digital off-axis holography, this angle separates
autocorrelation signals and the complex conjugated mirror image from the actual
signal in Fourier space. We demonstrate that by reconstructing the signal term
only, this approach enables full-range imaging, i.e., it increases the imaging
depth by a factor of two, and removes autocorrelation artifacts. The previously
demonstrated techniques of inverse scattering and holoscopy can then
numerically extend the focal range without loss of lateral resolution or
imaging sensitivity. The resulting, significantly enhanced measurement depth is
demonstrated by imaging a porcine eye over its entire depth, including cornea,
lens, and retina. Finally, the feasibility of in vivo measurements is
demonstrated by imaging the living human retina.
