Miniaturized Fourier-plane fiber scanner for OCT endoscopy
Miniaturized Fourier-plane fiber scanner for OCT endoscopy
复制标题
用于 OCT 内窥镜检查的小型傅里叶平面光纤扫描仪
DOI：
10.1088/1361-6439/aa8915
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
H. Zappe
中科院分区：
文献类型：
--
作者：
S. Vilches;S. Kretschmer;Ç. Ataman;H. Zappe
设计、制造并表征了一种采用傅立叶平面光纤扫描器的前视内窥镜光学相干层析成像(OCT)探头。与普通的像平面光纤扫描仪不同，傅里叶平面扫描仪是一种远心布置，它消除了像平面上的晕影和空间分辨率变化。为了以螺旋模式扫描OCT光束，使用管状压电致动器来谐振在其顶端带有准直GRIN透镜的光纤。GRIN透镜的自由端位于物镜的后焦平面，因此它的旋转复制了经典远心4f光学系统的准直区的光束角度。这种光学装置固有地具有较低的数值孔径和相对较大的视场，使得其对于内窥镜OCT成像特别有用。此外，傅里叶平面扫描仪的光路比可比的像平面扫描仪短一个物镜焦距，大大缩短了最终的布置。因此，在外径2.5 mm、总长度15 mm的3D打印外壳内，开发的探头是迄今为止最紧凑的前视内窥镜OCT成像仪。由于其紧凑的外形因素和与实时OCT成像的兼容性，所开发的探头也是用于柔性内窥镜的工作通道的理想选择，作为一种潜在的光学活检工具。
A forward-looking endoscopic optical coherence tomography (OCT) probe featuring a Fourier-plane fiber scanner is designed, manufactured and characterized. In contrast to common image-plane fiber scanners, the Fourier-plane scanner is a telecentric arrangement that eliminates vignetting and spatial resolution variations across the image plane. To scan the OCT beam in a spiral pattern, a tubular piezoelectric actuator is used to resonate an optical fiber bearing a collimating GRIN lens at its tip. The free-end of the GRIN lens sits at the back focal plane of an objective lens, such that its rotation replicates the beam angles in the collimated region of a classical telecentric 4f optical system. Such an optical arrangement inherently has a low numerical aperture combined with a relatively large field-of-view, rendering it particularly useful for endoscopic OCT imaging. Furthermore, the optical train of the Fourier-plane scanner is shorter than that of a comparable image-plane scanner by one focal length of the objective lens, significantly shortening the final arrangement. As a result, enclosed within a 3D printed housing of 2.5 mm outer diameter and 15 mm total length, the developed probe is the most compact forward-looking endoscopic OCT imager to date. Due to its compact form factor and compatibility with real-time OCT imaging, the developed probe is also ideal for use in the working channel of flexible endoscopes as a potential optical biopsy tool.
影响因子：
1.7
作者：
Ripandelli, G;Coppe, A M;Stirpe, M
通讯作者：
Stirpe, M