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Irregularity – Profilometric Measurement

Controls: Form of actual surface relative to perfect form

Related Terms: Form Error, Rt, Rq

Units: Linear units

Specification Must Contain: Value (RMS, Peak-to-Valley, +/- Sag Error or combination) over an aperture

Optimax Preferred Specification: +/- Sag Error in units of microns

Reasons: Change is relative to nominal form

Manufacturing Standards: ISO 10110-12, OEOSC OPI.006


For More Information
Optimax’s Technical Note on Irregularity

Optimax’s Tolerance Attributes Video