Spectroscopic identification of materials with calibrated full-field optical coherence tomography in the visible range - Archive ouverte HAL Access content directly
Conference Papers Year : 2012

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

Abstract

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).
No file

Dates and versions

hal-01236769 , version 1 (02-12-2015)

Identifiers

Cite

Antoine Morin, Jean-Marc Frigerio. Spectroscopic identification of materials with calibrated full-field optical coherence tomography in the visible range. OPTICAL MICRO- AND NANOMETROLOGY IV, 2012, 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA, Unknown Region. ⟨10.1117/12.921539⟩. ⟨hal-01236769⟩
49 View
0 Download

Altmetric

Share

Gmail Facebook X LinkedIn More