1. DVI is a technology of automated optical inspection, which can inspect deep to the differencefrom semi-transparent layers or semi-reflective layers.
2. DVI equip with a designed optical light path and a specified wave length projection light to control going through a semi-transparent/semi-reflective layer or not, then achieve doing deep vision inspection.
3. This make DVI is different from AOI and AXI. In general, AOI (Automated Optical Inspection) indicates defects on object surface, and AXI (Automated X-Ray Inspection) indicates defects in object inside.