Fig. 2.

Fourier transform of the intensity interference pattern on the camera for single exposure (i.e., a single 0.1 nm bandwidth within the sweep range). Fringe introduced by the off-axis reference beam shifts the signal (dashed red ellipse) and its complex conjugate term into opposite quadrants in the Fourier space. Here, signal and complex conjugate terms appear elliptical due to the non-square ROI ($384\times 240$ pixels); (b) B-scan without off-axis filtering. Many artifacts can be seen, including some very close to the retinal structure; (c) B-scan after filtering in the Fourier space. Although the numerical aperture of the system and limited angle at the carrier frequency does not allow complete separation of cross and autocorrelation terms, a significant noise suppression is achieved by this method.