Improve depth of field of optical coherence tomography using finite energy Airy beam

被引：17

作者：

Zhang, Miao ^{[1
]}

Ren, Zhijun ^{[2
,3
]}

Yu, Ping ^{[1
]}

机构：

[1] Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA

[2] Zhejiang Normal Univ, Key Lab Opt Informat Detecting & Display Technol, Jinhua 321004, Zhejiang, Peoples R China

[3] Zhejiang Normal Univ, Inst Informat Opt, Jinhua 321004, Zhejiang, Peoples R China

来源：

OPTICS LETTERS | 2019年 / 44卷 / 12期

基金：

美国国家科学基金会; 中国国家自然科学基金;

关键词：

MICROSCOPY;

D O I：

10.1364/OL.44.003158

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report a technique to break the depth of field (DOF) limit in optical coherence tomography (OCT) using a finite energy Airy beam. The Airy beam is generated using a phase mask in a Fourier transform schematic and provides the DOF improvement due to its low diffraction. We compare Airy beam OCT with conventional Gaussian beam OCT using lateral resolution and sensitivity. Experimental data from the polystyrene beads in water as well as lemon tissue confirm the extension of DOF up to 10 mm in Airy beam OCT, while the DOF of Gaussian beam OCT is less than 3.0 mm. We also demonstrate that a modified Airy beam can be effectively used in OCT by adjusting the truncating factor of the Airy beam via changing the pattern scale of the phase mask. This result provides a selection method for the use of a finite energy Airy beam in OCT. (C) 2019 Optical Society of America

引用

页码：3158 / 3161

页数：4

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