By Nel PreTech
Blue light scanning is a structured blue light scanning method. A projector casts a known blue light pattern onto a part surface. The pattern is observed using cameras. Specialized software uses optical triangulation to compute X, Y, and Z coordinate data. The output is a point cloud, which can be turned into a mesh, compared to CAD, or used for reverse engineering. Blue light scanning is best for fast capture of external surfaces, complex geometry, CAD comparison, deformation analysis, and reverse engineering. Blue light scanning performs best on visible external surfaces. Complex freeform shapes are often ideal because the scanner captures dense surface geometry more efficiently than limited manual measurements. Small precision components are a strong fit when external detail matters. Medical device parts, electronic housings, aerospace hardware, molded parts, and machined features can often be scanned using smaller fields of view and higher-resolution setups. Typical applications include medium-sized industrial components. Castings, automotive parts, mold tooling, and housing and assemblies can be scanned for deformation, first article inspection, reverse engineering, and CAD comparison. Large components can also be scanned, but the workflow changes. Machine frames, structural assemblies, tooling, and industrial equipment usually require multiple scan positions, registration targets, photogrammetry, or stitching. As size increases, accuracy depends more on registration strategy, environmental control, and calibration.
