High Quality Content by WIKIPEDIA articles! Dimensional Metrology is the science of calibrating and using physical measurement equipment to quantify the physical size of or distance from any given object. Inspection is a critical step in product development and quality control. Dimensional Metrology requires the use of a variety of physical scales to determine dimension, with the most accurate of these being holographic etalons or laser interferometers. The realization of dimension using these accurate scale technologies is the end goal of dimesional metrologists.