CAJ | 학술논문

利用光学软件GLAD的数值仿真技术设计了用于光学相干层析技术成像的基于梯度折射率(GRIN)镜头的小型化探头.首先,简述了梯度折射率镜头的基本特性,讨论了基于梯度折射率镜头的光学探头的设计方法；然后,对由单模光纤、玻璃棒隔片和梯度折射率镜头构成的探头模型进行了仿真.结果显示,利用GLAD的数值仿真技术为小型化探头的设计及其光学性能的验证提供了一种直观而有效的方法.另外,玻璃棒隔片存在一个适当的长度范围,可以改善设计的光学探头的传光性能.在所给仿真条件下,如设定梯度折射率镜头长0.1 mm、玻璃棒隔片长度为0.8～1.1 mm,则探头的工作距离将超过1.0 mm,而聚焦光斑的尺寸＜40 μm.
이용광학연건GLAD적수치방진기술설계료용우광학상간층석기술성상적기우제도절사솔(GRIN)경두적소형화탐두.수선,간술료제도절사솔경두적기본특성,토론료기우제도절사솔경두적광학탐두적설계방법；연후,대유단모광섬、파리봉격편화제도절사솔경두구성적탐두모형진행료방진.결과현시,이용GLAD적수치방진기술위소형화탐두적설계급기광학성능적험증제공료일충직관이유효적방법.령외,파리봉격편존재일개괄당적장도범위,가이개선설계적광학탐두적전광성능.재소급방진조건하,여설정제도절사솔경두장0.1 mm、파리봉격편장도위0.8～1.1 mm,칙탐두적공작거리장초과1.0 mm,이취초광반적척촌＜40 μm.
Numerical simulation technology was investigated by using the optical software GLAD to design Gradient Index(GRIN)lens based miniature probes for imaging of Optical Coherence Tomography(OCT).Firstly,the basic features of the GRIN lens were overviewed,and design methods for GRIN lens based optical probes were discussed.Then,the probe model consisting of a single mode fiber,a glass rod spacer and a GRIN lens were simulated.The simulating results show that the numerical simulation technique using GLAD can provide an intuitive and effective method for design of miniaturized probes and verification of their optical performance.In addition,the spacer can improve the optical properties of the GRIN lens based optical probes for there exists a suitable range of the spacer lengths in the glass rod.It shows that the working distance of the probe will be greater than 1.0 mm and the focus spot size less than 40 μm when the constant length of GRIN lens is to be 0.1 mm and the spacer length range from 0.8 to 1.1 mm.