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Lateral resolution enhancement using programmable phase modulator in optical coherence tomography

Issue title: Frontiers in Biomedical Engineering and Biotechnology – Proceedings of the 4th International Conference on Biomedical Engineering and Biotechnology, 18–21 August 2015, Shanghai, China

Guest editors: Feng Liu, Dong-Hoon Lee, Ricardo Lagoa and Sandeep Kumar

Article type: Research Article

Authors: Shirazi, Muhammad Faizana | Cho, Nam Hyuna | Jung, Woonggyub | Kim, Jeehyuna; *

Affiliations: [a] School of Electronics Engineering, Kyungpook National University, Daegu,702-701, Korea | [b] School of Nano-Bioscience & Chemical Engineering, Ulsan National Institute of Science and Technology, Ulsan, Korea

Correspondence: [*] Address for correspondence: Jeehyun Kim, School of Electronics Engineering, Kyungpook National University, Daegu 702-701, Korea. Tel.: 82-53-950-7221; Fax: 82-53-950-7221; E-mail: jeehk@knu.ac.kr.

Keywords: OCT, lateral resolution, aberration correction, adaptive optics, PAL-SLM

DOI: 10.3233/BME-151445

Journal: Bio-Medical Materials and Engineering, vol. 26, no. s1, pp. S1465-S1471, 2015

Published: 2015
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Adaptive optics plays an important role in the correction of high-order aberrations to enhance lateral resolution. An OCT system coupled with a programmable phase modulator is designed to verify lateral resolution improvement. The Hamamatsu high-resolution, non-pixelized, optically addressed light modulator (PAL-SLM) PPM X7550 series is used to correct aberrations, utilizing a simple method based on phase information from OCT images. The advantages of this method are its high simplicity and low cost. A raster scanning technique is adopted to scan samples covered with scattering suspension. Metal lines covered with scattering suspension are imaged, and a respective correction is applied to remove the aberration. Results demonstrate an improvement in lateral resolution on metal grid samples.

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