An integrated optical coherence tomography (OCT) and video rigid laryngoscope have been designed to acquire surface and subsurface tissue images of larynx simultaneously. The dual-modality system that is based on a common-path design with components as few as possible effectively maintains the light transmittance without compromising the imaging quality. In this paper, the field of view (FOV) of the system can reach [Formula: see text] by use of a gradient index (GRIN) lens as the relay element and a four-lens group as the distal objective, respectively. The simulation showed that the modulation transfer function (MTF) value in each FOV of the rigid video endoscope at 160[Formula: see text]lp/mm is greater than 0.1 while the root mean square (RMS) radii of the OCT beam in the center and edge of the FOV are 14.948[Formula: see text][Formula: see text]m and 73.609[Formula: see text][Formula: see text]m, respectively. The resolutions of both OCT and video endoscope meet the requirement of clinical application. In addition, all the components of the system are spherical, therefore the system can be of low cost and easy to assemble.

中文翻译：

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集成OCT和视频硬性喉镜的光学设计与仿真

集成的光学相干断层扫描 (OCT) 和视频刚性喉镜被设计用于同时获取喉部的表面和表面下组织图像。双模系统基于共路径设计，组件尽可能少，有效保持透光率，同时不影响成像质量。在本文中，系统的视场（FOV）可以通过使用梯度指数（GRIN）透镜作为中继元件和四透镜组作为远端物镜分别达到[公式：见正文]。仿真结果表明，硬视内窥镜在160[公式：见正文]lp/mm的每个FOV中的调制传递函数（MTF）值大于0.1，而OCT光束的均方根（RMS）半径在FOV 的中心和边缘为 14.948[公式：见正文][公式：见文本]m 和 73.609[公式：见文本][公式：见文本]m。OCT和视频内窥镜的分辨率均满足临床应用的要求。此外，该系统的所有部件均为球形，因此该系统成本低且易于组装。