# Flexible and universal autofocus based on amplitude difference of fractional Fourier transform

> Research article (Optics and Lasers in Engineering, 2023) · cited 26× · AI/ML

**Wikidata**: [openalex:W4390384667](https://www.wikidata.org/wiki/openalex:W4390384667)  
**Source**: https://4ort.xyz/entity/flexible-and-universal-autofocus-based-on-amplitude-difference-of-fractional-fourier-transform