24 July 2014 Improving axial resolution in spectral domain low-coherence interferometry through fast Fourier transform harmonic artifacts
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Abstract
Low-coherence interferometric setups in the Fourier domain can experience false structures after the Fourier transform procedure due to signal saturation; in fact, these structures are located at multiple frequencies of the original signal, also referred to as harmonics. This study aids in a better understanding of this phenomenon. The aim of the present work was to show that these features can be used to improve differential axial resolution in highly reflective samples. Using an optical coherence tomography system and calibrated step height standards, it was possible to achieve a resolution greater than the light source coherence length.
© 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)
Marcus Paulo Raele, Marcus Paulo Raele, Luiz Vicente Gomes Tarelho, Luiz Vicente Gomes Tarelho, Carlos Leonardo da Silva Azeredo, Carlos Leonardo da Silva Azeredo, Iakyra B. Couceiro, Iakyra B. Couceiro, Anderson Z. de Freitas, Anderson Z. de Freitas, } "Improving axial resolution in spectral domain low-coherence interferometry through fast Fourier transform harmonic artifacts," Optical Engineering 53(7), 073106 (24 July 2014). https://doi.org/10.1117/1.OE.53.7.073106 . Submission:
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