Angular high-speed massively-parallel detection SD-OCT for speckle
reduction
We demonstrate speckle reduction
based on angular compounding using parallel-detection spectral-domain (SD)
optical coherence tomography (OCT).
An ultrahigh-speed
two-dimensional (2D) complementary metal-oxide semiconductor (CMOS) camera
acquired angular and spectral interference fringes (128 × 1024
pixels) simultaneously at 15000 frames/s for a single lateral point.
A signal-to-noise ratio (SNR)
improvement of 8 dB was achieved for imaging human skin in vivo by
averaging 121 angle-resolved OCT images.
OCT images of a human fingertip in vivo with
an imaging range of 2.8 × 1.1
mm2 (lateral ×
axial) by compounding (a) 1, (b) 11, (c) 51, and (d) 121 angle-resolved images. The scale bar:
0.5 mm
Schematic
of the parallel SD-OCT system with a 2D camera (1024 × 128 pixels, 15000frames/s)