Today, in manufacturing, surface integrity is as important as dimensional accuracy. In components such as aircraft turbine blades, orthopedic implants, and semiconductor wafers, flawless surface quality is essential; even nanoscale surface irregularities can affect safety, efficiency, or performance. As tolerances become tighter and geometries more complex, advanced surface inspection techniques have become indispensable tools for ensuring product reliability. The Growing Role of Surface Inspection Historically, metrology focused mainly on dimensional conformity: length, diameter, flatness, and straightness. Today, surface texture, roughness,

Researchers at the Insurance Institute for Highway Safety (IIHS) are expanding how crash test assess brain injury risk by adopting a new metric focused on rotational head motion—forces often missed by current testing methods. Traditional crash test measures, like the Head Injury Criterion (HIC), quantify linear accelerations and are effective at predicting injuries such as skull fractures. But they are not designed to detect rotational or twisting forces on the brain—movements that occur when the head “whips” around after impact