Opt Lett. 2021 Mar 15;46(6):1413-1416. doi: 10.1364/OL.417178.
Fourier-domain full-field optical coherence tomography (FD-FF-OCT) has recently emerged as a fast alternative to point-scanning confocal OCT in eye imaging. However, when imaging the cornea with FD-FF-OCT, a spatially coherent laser can focus down on the retina to a spot that exceeds the maximum permissible exposure level. Here we demonstrate that a long multimode fiber with a small core can be used to reduce the spatial coherence of the laser and, thus, enable ultrafast in vivo volumetric imaging of the human cornea without causing risk to the retina.
傅里叶域全场光学相干断层扫描（FD-FF-OCT）最近作为一种替代眼部成像中单点扫描共聚焦 OCT 的快速方法而出现。然而，当用 FD-FF-OCT 对角膜成像时，空间相干激光可以聚焦到视网膜上超过最大允许暴露水平的点。在这里，我们证明了使用具有小芯的长多模光纤可以降低激光的空间相干性，从而能够在不损害视网膜的情况下实现对人眼角膜的超快体内体积成像。
