A laser line is a straight spot produced by laser technology and can be used in either a horizontal or vertical direction. It is widely used in precise positioning, marking, and measurement tasks.
The generation of laser lines is usually achieved by means of laser emitters and corresponding optical components. The laser emitter emits a highly focused laser beam, which is then shaped and adjusted by optical elements (e.g., cylindrical mirrors, wave mirrors, Powell mirrors, gratings) to form a straight beam.
Laser line specifications.
Laser line is used in machine vision, there are strict requirements for line width, wavelength, line length and other parameters, these parameters determine the pixel width and imaging quality of the line laser in the camera, at present, Powell lens can achieve a line width of about 14 m, and the 12 m laser line has been able to meet most of the machine vision applications.
Laser lines have a wide range of applications in machine vision, mainly for target detection, positioning, and measurement. Here are some common machine vision application scenarios:
1. 3D reconstruction and measurement: Laser grid lines can project accurate 2D or 3D grids for measuring and reconstructing the shape, contour and size of objects. By capturing the distortion of the laser grid lines on the surface of the object, the 3D coordinates and geometric information of the object can be calculated.
2. Surface defect detection: Laser grid lines can be used to detect defects on the surface of objects, such as depressions, bumps, cracks, etc. By analyzing the distortion or deformation of the laser grid lines on the surface, surface defects can be detected, and processed and judged accordingly.
3. Object positioning and alignment: Laser grid lines can be used for the positioning and alignment of objects, especially in automated production lines. By projecting laser grid lines, the machine vision system can identify the position and orientation of objects, enabling accurate positioning and alignment operations.
4. Edge detection and boundary extraction: Laser grid lines can be used for edge detection and boundary extraction tasks. By analyzing the interaction between the laser grid lines and the object, the edge position of the object can be determined, and the boundary information can be extracted.
5. Motion trajectory tracking: Laser grid lines can be used to track the motion trajectory of objects. By continuously projecting laser grid lines and analyzing their changes in different frames, the position and motion trajectory of objects can be tracked in real time.