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

Antoine Morin; Jean-Marc Frigerio

doi:10.1117/12.921539

4 May 2012 Spectroscopic identification of materials with calibrated full-field optical coherence tomography in the visible range

Antoine Morin, Jean-Marc Frigerio

Author Affiliations +

Proceedings Volume 8430, Optical Micro- and Nanometrology IV; 84300L (2012) https://doi.org/10.1117/12.921539
Event: SPIE Photonics Europe, 2012, Brussels, Belgium

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).

Citation Download Citation

Antoine Morin and Jean-Marc Frigerio "Spectroscopic identification of materials with calibrated full-field optical coherence tomography in the visible range", Proc. SPIE 8430, Optical Micro- and Nanometrology IV, 84300L (4 May 2012); https://doi.org/10.1117/12.921539

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available