Huang Zhen, Li Chengwei, Li Songquan, Li Dongyu
Appl Opt. 2016 Sep 1;55(25):7120-5. doi: 10.1364/AO.55.007120.
In order to improve fringe precision of a self-mixing signal, a simple and effective method based on an equivalent wavelength self-mixing interferometer is presented. And a linearization fringe counting method is proposed for equivalent wavelength self-mixing interferometry to quickly reconstruct target displacement. The validity of the proposed method was demonstrated by means of simulated signals and confirmed by several experimental measurements for both harmonic and aleatory target displacement with a fringe resolution of ∼125 nm.
为了提高自混合信号的条纹精度，提出了一种基于等效波长自混合干涉仪的简单有效方法。并且针对等效波长自混合干涉测量法提出了一种线性化条纹计数方法，以快速重建目标位移。通过模拟信号验证了该方法的有效性，并通过对谐波和随机目标位移进行的几次实验测量得到了证实，条纹分辨率约为125nm。
