Speckle is one of the main obstacles to application of self-mixing interferometer. Self-mixing model reflecting speckle is of great theoretical and practical significance in self-mixing interferometry. In the paper, we suggested an improved model which can clearly explain the effect of speckle on self-mixing signal, and draw some important results such as a mechanism of feedback coefficient intensity variation induced by speckle and effects of the surface orientation on the signal. The proposed model and method will provide an effective tool for practical application of self-mixing interferometer.

中文翻译：

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改进的反射散斑的自混合模型

散斑是自混合干涉仪应用的主要障碍之一。反映散斑的自混合模型在自混合干涉测量中具有重要的理论和实际意义。在本文中，我们提出了一种改进的模型，可以清楚地解释散斑对自混合信号的影响，并得出一些重要的结果，例如散斑引起的反馈系数强度变化的机制以及表面取向对信号的影响。所提出的模型和方法将为自混合干涉仪的实际应用提供有效的工具。