提出了一种扫频光学相干层析成像k-clock延时校正算法,该算法基于互相关运算,能够有效校正光源自带k-clock信号的延时。由于扫频光源的不稳定性、同步触发硬件的精度不足以及外界环境影响,扫频光源自带的kclock信号在重采样干涉信号时很可能与干涉信号之间有一个不确定的延时,导致系统分辨率下降。通过实验获得一个标准k-clock信号,然后利用互相关运算计算出需要校正的k-clock信号的延时。由计算出的延时,将kclock信号进行左右移动从而对其进行校正,再利用三次样条插值获得波数域等间隔的干涉信号。实验结果表明,该算法平均运行时间为0.18s,能够将系统分辨率提高18.2%,改善系统性能。 A swept-frequency optical coherence tomography k-clock delay correction algorithm is proposed, which can effectively correct the delay of light source with k-clock signal based on the cross-correlation operation. Due to the instability of the sweep light source, the lack of precision of the synchronous triggering hardware and the influence of the external environment, the kclock signal from the swept light source may have an indefinite delay with the interference signal when re-sampling the interference signal, resulting in System resolution decreased. A standard k-clock signal is obtained experimentally, and then the cross-correlation operation is used to calculate the delay of the k-clock signal to be corrected. From the calculated delay, the kclock signal is shifted left and right to correct it, and the cubic spline interpolation is used to obtain equal-interval interference signals in the wavenumber domain. The experimental results show that the average running time of this algorithm is 0.18s, which can improve the system resolution by 18.2% and improve the system performance.