Non-contact sensing is very desirable in many measurement situations. Non-contact sensors are free of probe wear or bounce, collect data at much higher rates than contact devices and do not influence the object being measured. Compared to capacitive and inductive devices, laser triangulation sensors have much larger standoff (distance from the sensor to the part). Compared to ultrasonic sensors...

Triangulation for long has been the backbone of land surveying and mapping. This work outlines its history in Iceland and provides an example of observations and computation in a triangulation network before the computer era came of age. The work describes briefly a computer program written in 1965 for the adjustment of observations in triangulation networks and mentions later improvements of t...

Triangulation of a 3D point from two or more views can be solved in several ways depending on how perturbations in the image coordinates are dealt with. A common approach is optimal triangulation which minimizes the total L2 reprojection error in the images, corresponding to finding a maximum likelihood estimate of the 3D point assuming independent Gaussian noise in the image spaces. Computatio...