title: Ghost reduction in CP-SSOCT having multiple references using Fourier-domain Shift and Sum.
abstract: We propose, test and validate a novel Fourier-domain based method for ghost image artifacts reduction in a common-path SSOCT system having multiple adjacent reference planes. Common-path probes with imaging systems containing high-index sapphire ball or other lenses produce multiple fixed references due to Fresnel reflections from the lens surfaces. The multiple reference planes produce multiple and overlapping OCT images. Since such ghost artifacts are the result of the superposition of multiple identical images having different amplitudes and spatial shifts, one can correctly shift and sum the images in the Fourier-domain once the relative amplitude and lateral position between the reference planes are known. This theory and numerical testing are presented to elucidate our method. We then validate the potential effectiveness using OCT imaging experiments.
authors.affiliation: Department of Electrical and Computer Engineering, Johns Hopkins University, Baltimore, MD, USA.
authors.forename: Gyeong Woo
authors.initials: GW
authors.lastname: Cheon
authors.affiliation: Wilmer Eye Institute, Johns Hopkins School of Medicine, Baltimore, MD, USA.
authors.forename: Peter L
authors.initials: PL
authors.lastname: Gehlbach
authors.affiliation: Department of Electrical and Computer Engineering, Johns Hopkins University, Baltimore, MD, USA.
authors.forename: Jin U
authors.initials: JU
authors.lastname: Kang
keywords: Biomedical optical imaging; Optical fiber sensors; Optical signal detection; Optical signal processing