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Proceedings Paper

Extended focal depth and lateral superresolution in optical coherence tomography
Author(s): Wei Liang; Maojin Yun; Meiling Liu; Feng Xia
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Paper Abstract

The depth resolution of the Optical Coherence Tomography (OCT) system is dependent on the coherence length and the lateral resolution depends on the beam waist on the sample. In OCT, optical axial resolution can thus be increased by selecting a broad band source. High NA lenses provide smaller spot size than low NA lens at the expense of short depth of focus that often does not stretch along. This is a trade-off between lateral resolution and depth of focus. In this paper, a new kind of polarization pupil mask, which consists of a three-portion half-wave plate between two parallel quarter-wave plates, is introduced into the Optical Coherence Tomography (OCT) systems, has the ability to realize the lateral superresolution and extend the focal depth in a small range when used as an apodizer in the optical imaging system. The simulation results show that high focal depth which is two times of the original optical system and the lateral superresolution can be realized at the same time.

Paper Details

Date Published: 27 September 2011
PDF: 6 pages
Proc. SPIE 8134, Optics and Photonics for Information Processing V, 81340Q (27 September 2011); doi: 10.1117/12.892084
Show Author Affiliations
Wei Liang, Univ. of Jinan (China)
Maojin Yun, Qingdao Univ. (China)
Meiling Liu, Qingdao Univ. (China)
Feng Xia, Qingdao Univ. (China)

Published in SPIE Proceedings Vol. 8134:
Optics and Photonics for Information Processing V
Khan M. Iftekharuddin; Abdul Ahad Sami Awwal, Editor(s)

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