# Universal phase-shifting algorithm (UPSA) for nonuniform phase-step demodulation and null-testing criterion for phase accuracy gauging

> Research article (Optics and Lasers in Engineering, 2022) · cited 23× · AI/ML

**Wikidata**: [openalex:W4285489637](https://www.wikidata.org/wiki/openalex:W4285489637)  
**Source**: https://4ort.xyz/entity/universal-phase-shifting-algorithm-upsa-for-nonuniform-phase-step-demodulation-and-null-testing-criterion-for-phase-accu