Meaning
Geometric position determination using fixed baseline triangles calculates target distance from light reflection angles on photosensitive detector arrays. Transmitter laser diodes and receiver lenses arranged at known geometric angles implement optical triangulation to capture surface topography profiles. Target movement along the measurement axis shifts diffuse light spots across linear charge-coupled devices or complementary metal-oxide semiconductor sensors.
Electronic processing converts pixel spot locations into calibrated distance values.
Geometric Layout
Base distance between laser diode emitter and imaging lens determines measurement range and sensitivity. Scheimpflug geometry tilts imaging sensors relative to optical lens axes, maintaining sharp focus across full measurement depths. Angular separation between projection beam and receiver optics controls depth resolution.
Compact sensor housings secure optical components against mechanical thermal expansion shifts.
Surface Interaction
Target surface roughness dictates light scattering characteristics. Diffusely scattering surfaces yield uniform light spots on imaging arrays, whereas specular surfaces require specific polarizer orientations or angled sensor mounting. Translucent materials cause sub-surface light scattering, shifting detected spot centers and introducing measurement errors.
Adaptive laser power circuits adjust light intensity dynamically based on surface reflectivity.
Factory Sign-off
Automated target positioners sweep reference step blocks across displacement zones during production testing. Quality sign-off confirms linearity errors remain within hardware specification limits.
