Reference markers

Reference markers are fixed points or features on an object that serve as reference or starting points for measurements. They are used to enable the alignment of an object or measurement device and ensure accurate and reproducible measurements.

Reference markers play a crucial role in 3D metrology as they act as anchor points for determining the position, orientation, and scaling of an object within a 3D coordinate system. By placing reference markers at known positions, precise measurements can be performed as the relative position of the object to these fixed points is known.

Reference markers can take various forms and features. They can be physical features such as holes, recesses, edges, or specialized markings on the surface of the object. These physical reference markers can be precisely located using measurement devices or probes. When aligning a measurement device, these reference markers are used as reference or anchor points to determine the exact position of the object in space.

Additionally, reference markers can also be defined virtually or through software. In this case, specific points or coordinates on the object are set as reference points. Inspection software allows for the definition and tracking of these reference markers to ensure accurate alignment of the object.

Reference markers are critical in ensuring accurate and reproducible measurements in 3D metrology. They serve as the foundation for aligning objects or measurement devices in space, enabling the precise determination of positions, distances, angles, and other geometric features of the measured object. By using reference markers, the accuracy of measurements can be improved by minimizing systematic errors and aligning the measurements to a common reference point.