1. Laser triangulation technology

 Laser triangulation, sometimes called "displacement sensor", is a method of scanning the surface of an object through laser lines to obtain depth data at each point of the object.The characteristic of this technology is that its measurement results can achieve high accuracy at the micron level.The principle of laser triangulation is that the laser emitter emits laser lines, and then analyzes and obtains depth information through the deformation of the laser lines observed by the camera.Despite its high precision and dynamic speed measurement performance, the main limitation of laser triangulation is its limited scanning speed and operating range.

2. Laser triangulation

Laser triangulation method is to use light space propagation processOptical reflection law and Similar triangle principle, in the receiving lensObject space and Imaging spaceCompositionSimilar triangle relationship, and calculate the displacement to be measured using edge-angle relationship.

• According to the angle between the incident laser and the normal of the surface of the object to be measured, the laser triangulation method can be divided into

  Whether it is direct or oblique laser triangular distance measurement, high-precision and non-contact measurement of the object to be measured can be achieved, but the resolution of the direct type is not as high as that of the oblique.

The high accuracy of laser triangulation has made it widely used in online detection and other fields.Its application in manufacturing, medical and engineering fields is an important branch of 3D visual measurement technology.