Publication

Spectroscopic optical coherence tomography based on wavelength de-multiplexing and smart pixel array detection

Theo Lasser, Boris Clément Karamata, Stéphane Bourquin
2004
Journal Articles

Abstract

Current spectroscopic optical coherence tomography (OCT) methods rely on a posteriori numerical calculation. We present an experimental alternative for accessing spectroscopic information in OCT without post-processing based on wavelength de-multiplexing and parallel detection using a diffraction grating and a smart pixel detector array. Both a conventional A-scan with high axial resolution and the spectrally resolved measurement are acquired simultaneously. A proof-of-principle demonstration is given on a dynamically changing absorbing sample. The method's potential for fast spectroscopic OCT imaging is discussed. The spectral measurements obtained with this approach are insensitive to scan non-linearities or sample movements. (C) 2004 Elsevier B.V. All rights reserved.

Official source

https://infoscience.epfl.ch/entities/publication/5cc847b8-fa1e-446a-b34e-811c31a3f40f

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Theo Lasser, Boris Clément Karamata, Stéphane Bourquin
2004
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/5cc847b8-fa1e-446a-b34e-811c31a3f40f

About this result

Related concepts (32)

Optical coherence tomography

Optical coherence tomography (OCT) is an imaging technique that uses low-coherence light to capture micrometer-resolution, two- and three-dimensional images from within optical scattering media (e.g., biological tissue). It is used for medical imaging and industrial nondestructive testing (NDT). Optical coherence tomography is based on low-coherence interferometry, typically employing near-infrared light. The use of relatively long wavelength light allows it to penetrate into the scattering medium.

Interferometry

Interferometry is a technique which uses the interference of superimposed waves to extract information. Interferometry typically uses electromagnetic waves and is an important investigative technique in the fields of astronomy, fiber optics, engineering metrology, optical metrology, oceanography, seismology, spectroscopy (and its applications to chemistry), quantum mechanics, nuclear and particle physics, plasma physics, biomolecular interactions, surface profiling, microfluidics, mechanical stress/strain measurement, velocimetry, optometry, and making holograms.

Diffraction

Diffraction is the interference or bending of waves around the corners of an obstacle or through an aperture into the region of geometrical shadow of the obstacle/aperture. The diffracting object or aperture effectively becomes a secondary source of the propagating wave. Italian scientist Francesco Maria Grimaldi coined the word diffraction and was the first to record accurate observations of the phenomenon in 1660.

Related publications (3)

Spectroscopic optical coherence tomography based on wavelength de-multiplexing and smart pixel array detection

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