A modified fractal zone plate with extended depth of focus in spectral domain optical coherence tomography

被引：21
作者：
Zhang, Q. Q. [1 ]
Wang, J. G. [1 ]
Wang, M. W. [1 ]
Bu, J. [1 ]
Zhu, S. W. [2 ]
Wang, R. [3 ]
Gao, Bruce Z. [3 ]
Yuan, X-C [1 ]
机构：
[1] Nankai Univ, Minist Educ China, Inst Modern Opt, Key Lab Optoelect Informat Sci & Technol, Tianjin 300071, Peoples R China
[2] Nankai Univ, Affiliated Hosp, Tianjin 300121, Peoples R China
[3] Clemson Univ, Dept Bioengn, Clemson, SC 29634 USA
来源：
JOURNAL OF OPTICS | 2011年 / 13卷 / 05期
关键词：
optical coherence tomography; depth of focus; fractal zone plate;
D O I：
10.1088/2040-8978/13/5/055301
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In optical coherence tomography (OCT) systems, there is a trade-off between the depth of focus (DOF) and lateral resolution when conventional lenses are used. We propose a new method that employs a modified fractal generalized zone plate (MFraGZP) combined with a conventional lens to improve the trade-off effect, with an extended DOF of about 2.5 mm (14 times larger) while the lateral resolution is maintained at similar to 9.5 mu m. As an example, images of the calibration microspheres are obtained and demonstrated with the extended DOF in a spectral domain OCT system.
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页数：6
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