Evaluating X Ray Beam Hardening Corrections in Dense Optical Polymers
Resin-specific polynomial linearization suppresses computed tomography cupping artifacts in dense optical polymers while preserving inline cycle times.
Metrology Verification
Meaning
Formal assessment procedures confirm that a measurement system provides results within specified tolerances compared to a known standard. Rigorous metrology verification establishes the reliability of a production gauge before it is used to sign off on high-precision aerospace components. This process involves a series of tests that check the accuracy, repeatability and linearity of the instrument.
It is the final step in the setup of a new inspection cell on a manufacturing floor. By comparing the machine’s output to a certified master part, a facility can prove its capability to the customer.
Accuracy Check
Determining how close a measurement is to the true value of the object is the primary goal of the audit. During metrology verification, a technician uses artifacts with traceable dimensions to calibrate the sensors and the software. This ensures that a measurement of ten millimeters on the screen actually corresponds to ten millimeters in the physical world.
System Calibration
Aligning the physical components of the scanner with the digital coordinate system is a requirement for spatial precision. Metrology verification includes a check of the rotation stage, the source position and the detector tilt. If any of these are out of alignment, the resulting data will be skewed and the inspection results will be invalid.
Measurement Confidence
Establishing a statistical baseline for the system’s performance allows a facility to calculate its uncertainty budget. When metrology verification is complete, the organization can be sure that its measurements are defensible in a court of law or a safety audit. This confidence is what allows a production line to run at full speed without constant manual checks.