# Multiple-Image Hiding Based on Cascaded Free-Space Wave Propagation Using the Structured Phase Mask for Lensless Optical Security System

> Research article (IEEE photonics journal, 2017) · cited 17× · AI/ML

**Wikidata**: [openalex:W2755617119](https://www.wikidata.org/wiki/openalex:W2755617119)  
**Source**: https://4ort.xyz/entity/multiple-image-hiding-based-on-cascaded-free-space-wave-propagation-using-the-structured-phase-mask-for-lensless-optical