Light Inspection
Measurement systems that use lasers or high resolution cameras provide non contact analysis of surface profiles. Optical metrology in the packaging industry is used to verify the height of embossing, the depth of creases and the thickness of coatings. By projecting a known pattern of light onto the board, the system can calculate the three dimensional shape of the surface with micron precision.
This method is faster and more accurate than traditional mechanical gauges.
Data Acquisition
Digital sensors capture thousands of data points in seconds to create a topographic map of the substrate. This information allows quality control teams to see if a die is wearing down or if the press pressure is dropping. Because it is non contact, there is no risk of damaging the delicate surface of the printed sheet.
The software can compare the measured result against the original CAD file to identify any deviations.
Quality Verification
Compliance with brand standards often requires proof that the finishing effects meet a specific height requirement. Optical metrology provides the objective data needed to sign off on a production run. It is also used to inspect the quality of the engraving on the dies before they are sent to the pressroom.
This ensures that every tool is within tolerance before any board is wasted.
