*Article* **Novel Generalized Three-Step Phase-Shifting Interferometry with a Slight-Tilt Reference**

**Xianfeng Xu 1,\*, Tianyu Ma 1, Zhiyong Jiao 1, Liang Xu 1, Dejun Dai 2, Fangli Qiao <sup>2</sup> and Ting-Chung Poon <sup>3</sup>**


Received: 28 October 2019; Accepted: 16 November 2019; Published: 21 November 2019
