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

A modified fractal zone plate with extended depth of focus in spectral domain optical coherence tomography.
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DOI:
10.1088/2040-8978/13/5/055301
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发表时间:
2011-05-01
期刊:
Journal of optics (2010)
影响因子:
--
通讯作者:
Yuan XC
Yuan XC
中科院分区:
其他
文献类型:
--
作者:
Zhang QQ;Wang JG;Wang MW;Bu J;Zhu SW;Wang R;Gao BZ;Yuan XC

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在光学相干层析成像(OCT)系统中,当使用传统透镜时,在焦深(DOF)和横向分辨率之间存在权衡。我们提出了一种新的方法,将改进的分形广义波带板与传统透镜相结合来改善折衷效果,在横向分辨率保持在~9.5μm的情况下,扩展自由度约为2.5 mm(14倍)。作为例子,我们在光谱域OCT系统中获得并演示了校准微球的图像。
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 ~9.5 μm. 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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