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Optical Engineering

Numerical simulation validation of nonuniform, nonharmonic analysis of spectral-domain optical coherence tomography
Author(s): Tetsuya Uchida; Yuya Inuzuka; Masaya Hasegawa; Shigeki Hirobayashi; Tadanobu Misawa
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Paper Abstract

In spectral-domain optical coherence tomography (SD-OCT), the limited resolution of the spectrometer causes nonuniformity of the interference signal. The latter, in turn, causes the sensitivity of SD-OCT to decrease, thereby limiting the imaging range and decreasing the axial resolution. We addressed this problem by applying nonuniform, nonharmonic analysis (NUNHA) with software that features high-frequency resolution without interpolation. We demonstrate the application of NUNHA in SD-OCT and compare it with conventional frequency analysis methods by simulating nonuniform interference signals. The results suggest that application of NUNHA in SD-OCT can provide acquisition of a clearer tomographic image, accurate analysis of fine and complex structures, and preservation of resolution and sensitivity at regions deep within a sample. This is because it reduces the influence of nonuniformity caused by the spectrometer and is unaffected by distortion due to interpolation.

Paper Details

Date Published: 25 March 2015
PDF: 12 pages
Opt. Eng. 54(3) 033108 doi: 10.1117/1.OE.54.3.033108
Published in: Optical Engineering Volume 54, Issue 3
Show Author Affiliations
Tetsuya Uchida, Univ. of Toyama (Japan)
Yuya Inuzuka, Univ. of Toyama (Japan)
Masaya Hasegawa, Univ. of Toyama (Japan)
Shigeki Hirobayashi, Univ. of Toyama (Japan)
Tadanobu Misawa, Univ. of Toyama (Japan)

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