Optical coherence tomography (OCT), as a low-coherence interferometric imaging technique, inevitably suffers from
speckle noise, which can reduce image quality and signal-to-noise (SNR). In this paper, we present a dual-beam angular
compounding method to reduce speckle noise and improve SNR of OCT image. Two separated parallel light beams are
created on the sample arm using a 1x2 optical fiber coupler and are focused into samples at different angles. The
epi-detection scheme creates three different light path combinations of these two light beams above. The three
combinations produce three images in single B-scan, which are completely separated in depth. The three images show
uncorrelated speckle patterns and therefore can be averaged to create a new image with reduced speckle noise. Compared
to those reported angular and spatial compounding methods, our method retains their advantages, and moreover has a
faster imaging speed and keep the transverse resolution. This method was evaluated on human fingertips in vivo. The
results demonstrated a good improvement in speckle contrast.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.