The primary optimization of the imaging speed of optical coherence tomography (OCT) has been keenly studied. In order to overcome the major speed limitation of spectral-domain OCT (SD-OCT), we developed an ultrahigh-speed SD-OCT system, with an A-scan rate of up to 1 MHz, using the method of space–time-division multiplexing (STDM). Multicameras comprising a single spectrometer were implemented in the developed ultrahigh-speed STDM method to eliminate the dead time of operation, whereas STDM was simultaneously employed to enable wide-range scanning measurements at a high speed. By successfully integrating the developed STDM method with GPU parallel processing, 8 vol/s for an image range of 250×250×2048250\times 250\times2048 pixels ( 9×4.5×59\times 4.5\times 5 mm) was achieved, with an adjustable volume rate according to the required scanning speed and range. The examined STDM-OCT results of the customized optical thin film confirmed its feasibility for various fields that require rapid and wide-field scanning.

中文翻译：

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使用空时分复用实现 A 扫描速率高达 1 MHz 的超高速谱域光学相干断层扫描


光学相干断层扫描（OCT）成像速度的初步优化已得到深入研究。为了克服谱域OCT（SD-OCT）的主要速度限制，我们开发了超高速SD-OCT系统，A扫描速率高达1 MHz，采用时空方法分频复用 (STDM)。在开发的超高速 STDM 方法中实现了由单个光谱仪组成的多相机，以消除操作的死区时间，同时采用 STDM 来实现高速宽范围扫描测量。通过成功地将开发的STDM方法与GPU并行处理相结合，实现了8 vol/s的图像范围250×250×2048250×250×2048像素（9×4.5×59×4.5×5毫米），根据所需的扫描速度和范围可调节体积速率。定制光学薄膜的STDM-OCT检查结果证实了其在需要快速、宽视场扫描的各个领域的可行性。