Highly compact imaging using Bessel beams generated by ultraminiaturized multi-micro-axicon systems.
Highly compact imaging using Bessel beams generated by ultraminiaturized multi-micro-axicon systems.
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DOI：
10.1364/josaa.29.000808
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发表时间：
2012-05
期刊：
影响因子：
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通讯作者：
N. Weber;Dominik Spether;A. Seifert;H. Zappe
中科院分区：
文献类型：
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作者：
N. Weber;Dominik Spether;A. Seifert;H. Zappe
在成像中采用贝塞尔光束利用其自重构特性来实现小焦点，同时保持大的焦深。贝塞尔光束有效地产生使用轴棱锥，和他们的效用在扫描成像系统，如光学相干断层扫描（OCT），已被证明。由于这些系统被小型化以允许例如内窥镜实施，因此需要微轴棱锥以确保保持大的焦深。我们在这里演示的设计，制造和应用的模压微锥用于硅基微光学工作台。它示出的多个凸和凹轴棱锥的安排可以实现优化的焦点深度在一个小型化的OCT系统中，使用远短的光学系统的长度比经典的微光学可实现的伸缩光学装置。
Employing Bessel beams in imaging takes advantage of their self-reconstructing properties to achieve small focal points while maintaining a large depth of focus. Bessel beams are efficiently generated using axicons, and their utility in scanning imaging systems, such as optical coherence tomography (OCT), has been demonstrated. As these systems are miniaturized to allow, for example, endoscopic implementations, micro-axicons are required to assure the maintenance of a large depth of focus. We demonstrate here the design, fabrication, and application of molded micro-axicons for use in silicon-based micro-optical benches. It is shown that arrangements of multiple convex and concave axicons may be implemented to optimize the depth of focus in a miniaturized OCT system, using a telescopic optical arrangement of considerably shorter optical system length than that achievable with classical micro-optics.