MORIN, Antoine; FRIGERIO, Jean-Marc

doi:10.1117/12.921539

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MORIN, Antoine
Institut des Nanosciences de Paris [INSP]

FRIGERIO, Jean-Marc
Biodiversité, Gènes & Communautés [BioGeCo]
Institut des Nanosciences de Paris [INSP]

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Communication dans un congrès avec actes

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OPTICAL MICRO- AND NANOMETROLOGY IV, 2012, 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA. 2012, vol. 8430

SPIE-INT SOC OPTICAL ENGINEERING

Résumé en anglais

For twenty years Optical Coherence Tomography (OCT) has been interested in imaging in turbid media. Recently, conventional OCT has been extended to spectroscopic investigation (SOCT). For a full-field OCT configuration in the visible range, we show that the interference conditions are not equal in the whole field of view: the effective numerical aperture depends on the observation point. This results in a spectral shift towards higher wavelengths of the OCT spectra, leading to errors in spectroscopic analysis. We propose a general calibration method for SOCT measurements which has been tested within a protocol, to perform spatially-resolved spectroscopic identification of material by OCT. Firstly we measure the reflectivity of a plane gold sample, corresponding closely to the measurement made with a spectrometer. Then we successfully identify the reflectivity of gold in a mixed sample (silicon and gold).< Réduire

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Optical coherence tomography

Spectroscopy

Calibration

Micro-spectrometry

Identification

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Spectroscopic identification of materials with calibrated full-field optical coherence tomography in the visible range

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