Optical+Biomedical Engineering Laboratory, School of Electrical, Electronic and Computer Engineering, The University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia.
Opt Lett. 2010 Jul 15;35(14):2445-7. doi: 10.1364/OL.35.002445.
We present a speckle reduction technique for optical coherence tomography based on strain compounding. Decorrelation is introduced between B-scans by altering the sample's strain. A theoretical description of the technique, based on a transfer-function formalism, and experimental results on silicone phantoms are presented. Nearly complete decorrelation between successive B-scan speckle patterns was observed for a variation in strain of 0.045. Strain compounding by averaging nine B-scans, with 0.003 strain increments between them, resulted in a 1.5-fold reduction in speckle contrast ratio.
我们提出了一种基于应变复合的光学相干断层扫描去斑技术。通过改变样品的应变，在 B 扫描之间引入了去相关。本文基于传递函数形式主义，对该技术进行了理论描述，并给出了硅酮模型的实验结果。在应变变化为 0.045 的情况下，相邻 B 扫描散斑图案之间几乎完全去相关。通过对 9 个 B 扫描进行平均，并在它们之间增加 0.003 的应变增量，得到的散斑对比度降低了 1.5 倍。
