# Steep freeform measurement method based on a normal transverse differential confocal

> Research article (Optics Express, 2022) · cited 12× · AI/ML

**Wikidata**: [openalex:W4306644664](https://www.wikidata.org/wiki/openalex:W4306644664)  
**Source**: https://4ort.xyz/entity/steep-freeform-measurement-method-based-on-a-normal-transverse-differential-confocal