Nankivil Derek, Dhalla Al-Hafeez, Gahm Niklas, Shia Kevin, Farsiu Sina, Izatt Joseph A
Opt Lett. 2014 Jul 1;39(13):3740-3. doi: 10.1364/OL.39.003740.
The effective speed of a swept source optical coherence tomography (SSOCT) imaging system was quadrupled using efficient sweep buffering along with coherence revival and spatial multiplexing. A polarizing beam splitter and fold mirror assembly were used to create a dual spot sample arm with a common objective designed for near-diffraction-limited retinal imaging. Using coherence revival, a variable optical delay line allowed for separate locations within a sample to be simultaneously imaged and frequency encoded by carefully controlling the optical path length of each sample path. This method can be used to efficiently quadruple the imaging speed of any SSOCT system employing a low duty-cycle laser that exhibits coherence revival. The system was used to image the retina of healthy human volunteers.
通过高效的扫描缓冲以及相干恢复和空间复用技术，扫频源光学相干断层扫描（SSOCT）成像系统的有效速度提高了四倍。使用偏振分束器和折叠镜组件创建了一个双光斑样品臂，该样品臂具有一个用于近衍射极限视网膜成像的共用物镜。利用相干恢复技术，可变光学延迟线通过仔细控制每个样品路径的光程长度，使得样品内的不同位置能够同时成像并进行频率编码。该方法可用于有效提高任何采用具有相干恢复特性的低占空比激光器的SSOCT系统的成像速度。该系统用于对健康人类志愿者的视网膜进行成像。
