Combining Gabor and Talbot bands techniques to enhance the sensitivity with depth in Fourier domain optical coherence tomography

by Adrian Bradu, Manuel J. Marques, Petr Bouchal, Adrian Gh. Podoleanu
Abstract:
The purpose of this study was to show how to favorably mix two e_ects to improve the sensitivity with depth in Fourier domain optical coherence tomography (OCT): Talbot bands (TB) and Gabor-based fusion (GF) technique. TB operation is achieved by directing the two beams, from the object arm and from the reference arm in the OCT interferometer, along parallel separate paths towards the spectrometer. By changing the lateral gap between the two beams in their path towards the spectrometer, the position for the maximum sensitivity versus the optical path difference in the interferometer is adjusted. For five values of the focus position, the gap between the two beams is readjusted to reach maximum sensitivity. Then, similar to the procedure employed in the GF technique, a composite image is formed by edging together the parts of the five images that exhibited maximum brightness. The combined procedure, TB/GF is examined for four different values of the beam diameters of the two beams. Also we demonstrate volumetric FD-OCT images with mirror term attenuation and sensitivity profile shifted towards higher OPD values by applying a Talbot bands configuration.
Reference:
Combining Gabor and Talbot bands techniques to enhance the sensitivity with depth in Fourier domain optical coherence tomography (Adrian Bradu, Manuel J. Marques, Petr Bouchal, Adrian Gh. Podoleanu), In Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XVII (James G. Fujimoto; Joseph A. Izatt; Valery V. Tuchin, ed.), volume 8571, 2013.
Bibtex Entry:
@inproceedings{bradu2013combining,
	abstract = {The purpose of this study was to show how to favorably mix two e_ects
	to improve the sensitivity with depth in Fourier domain optical coherence
	tomography (OCT): Talbot bands (TB) and Gabor-based fusion (GF) technique.
	TB operation is achieved by directing the two beams, from the object
	arm and from the reference arm in the OCT interferometer, along parallel
	separate paths towards the spectrometer. By changing the lateral
	gap between the two beams in their path towards the spectrometer,
	the position for the maximum sensitivity versus the optical path
	difference in the interferometer is adjusted. For five values of
	the focus position, the gap between the two beams is readjusted to
	reach maximum sensitivity. Then, similar to the procedure employed
	in the GF technique, a composite image is formed by edging together
	the parts of the five images that exhibited maximum brightness. The
	combined procedure, TB/GF is examined for four different values of
	the beam diameters of the two beams. Also we demonstrate volumetric
	FD-OCT images with mirror term attenuation and sensitivity profile
	shifted towards higher OPD values by applying a Talbot bands configuration.},
	author = {Adrian Bradu and <b>Manuel J. Marques</b> and Petr Bouchal and Adrian Gh. Podoleanu},
	booktitle = {Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XVII},
	doi = {10.1117/12.2003983},
	editor = {James G. Fujimoto; Joseph A. Izatt; Valery V. Tuchin},
	journal = {Proc. SPIE},
	month = {February},
	pages = {857136--857136--6},
	title = {{Combining Gabor and Talbot bands techniques to enhance the sensitivity with depth in Fourier domain optical coherence tomography} },
	url = { http://dx.doi.org/10.1117/12.2003983},
	volume = {8571},
	year = {2013}
}