摘要
为研制适用于扫频光学相干断层成像(Swept Source Optical Coherence Tomography,SS-OCT)系统的高性能侧视型全光纤镜头,分析了侧视型光纤镜头的性能影响因素及样品制作方法。对基于梯度折射率(Graded-Index,GRIN)光纤的侧视型全光纤镜头的光学模型进行解析,得出与侧视型全光纤镜头性能相关的特征参数。研究了“单模光纤+无芯光纤+GRIN光纤+转角介质”四段式侧视型镜头各组件长度对其光学聚焦性能的影响,设计各组件的适宜长度范围。最后,制作了外径小至0.5 mm、刚性长度2.75 cm的超小侧视型全光纤镜头样品,通过实验测得镜头的工作距离(0.52 mm)和光斑直径(26.82μm),与理论分析结果基本一致,并将镜头样品集成于SS-OCT成像系统,获得了清晰的生物组织层析图像。实验结果表明,本文提出的分析方法可用于侧视型全光纤成像镜头结构参数的优化设计。
To develop high-performance side-viewing all-fiber lenses applicable to the swept-source optical coherence tomography(SS-OCT)system,the factors influencing the performance of a type of side-view⁃ing all-fiber lens and the sample production methods were studied.First,the graded-index(GRIN)optical model of the side-viewing full-fiber lens with the GRIN fiber was analyzed,and the graded parameters re⁃lated to the performance of the side-viewing full-fiber lens were obtained.Second,the effect of the length of each component of the four-stage side-viewing lens“SMF+NCF+GRIN fiber+Angle prism”on its optical focusing performance was studied,and the appropriate length range of each component was de⁃signed.Finally,an ultrasmall side-viewing all-fiber lens with an outer diameter as small as 0.5 mm and a rigid length of 2.75 cm was fabricated.Experimental results show that the working distance(0.52 mm)and spot diameter(26.82μm)of the lens are consistent with the theoretical analysis results.The lens sample is integrated into the SS-OCT imaging system to obtain clear tomographic images of biological tissues;thus,the performance of the designed lens is verified.The results indicate that the proposed method can be used to optimize the structural parameters of side-viewing all-fiber imaging lenses.
作者
王驰
任丹阳
陈金波
张帅帅
孙建美
WANG Chi;REN Danyang;CHEN Jinbo;ZHANG Shuaishuai;SUN Jianmei(Department of Precision Mechanical Engineering,Shanghai University,Shanghai 200444,China)
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2023年第15期2171-2180,共10页
Optics and Precision Engineering
基金
国家自然科学基金资助项目(No.62175144)
上海市科技创新行动计划项目(No.20142200100)。
