Absolute distance measurement based on multiple self-mixing interferometry

作者：Duan, Zhiwei; Yu, Yangyang; Gao, Bingkun^*; Jiang, Chunlei^*

来源：Optics Communications, 2017, 389: 270-274.

DOI：10.1016/j.optcom.2016.12.046

• Multiple Self-mixing Interferometry
• Triangular wave modulation
• Distance measurement

To improve the precision of distance measurement using laser Self-Mixing Interferometry (SMI) and compute short distance, we propose a method of Multiple Self-Mixing Interferometry (MSMI) that is modulated with a triangular wave. The principle of this method has been described in this paper. Experiments at different distances and amplitudes of modulation current are based on the proposed method. Low-priced and easily operated experimental devices are built. Experimental results show that a resolution of 2.7 mm can be achieved for absolute distance ranging from 2.2 to 23 cm.

• 出版日期2017-4-15
• 单位东北石油大学; 哈尔滨工业大学