Comparison of different focusing systems for common-path optical coherence tomography with fiber-optic bundle as endoscopic probe
Comparison of different focusing systems for common-path optical coherence tomography with fiber-optic bundle as endoscopic probe
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DOI：
10.1117/1.3250270
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发表时间：
2009-10-01
影响因子：
1.3
通讯作者：
Kang, Jin U.
中科院分区：
文献类型：
--
作者：
Wang, Weichao;Zhang, Kang;Kang, Jin U.
提出了一种用于内窥镜共光路光学相干层析成像系统的基于光纤光栅的亚毫米探头。三种不同的聚焦系统，散装透镜，梯度折射率（GRIN）透镜，和微透镜阵列，提出和比较。仿真结果表明，所有的聚焦系统都能以不同程度的有效性对光束进行聚焦。不同聚焦系统之间的主要差异存在于光束尺寸和光纤束的内部和外部像素之间的发散角。微透镜阵列显示出从中心光纤到最外光纤的光束尺寸的最小变化，而GRIN透镜表现出最大的变化。考虑到光纤束相邻像素之间的衰减和串扰，还分析了系统的信噪比。(c)2009年，由光学仪器工程师协会（Society of Photo-Optical Instrumentation Engineers）主办。[DOI电话：10.1117/1.3250270
A fiber-optic bundle-based submillimeter probe for endoscopic common-path optical coherence tomography with focusing system is presented. Three different focusing systems, bulk lenses, a gradient index (GRIN) lens, and a microlens array, are proposed and compared. The simulation results show that all the focusing systems can focus the beam with different degrees of effectiveness. The major differences between the different focusing systems exist in the beam size and the divergence angle between the inner and outer pixels of the fiber bundle. The microlens array shows the smallest change in beam size from the central fiber to the outermost fiber, while the GRIN lens exhibits the largest. Signal-to-noise ratio of the system, taking attenuation and cross talk between adjacent pixels of the fiber bundle into account, is also analyzed. (c) 2009 Society of Photo-Optical Instrumentation Engineers. [DOI: 10.1117/1.3250270]