Structured light, such as dots, dot matrices, lines, grids, and circles, plays an important role in machine-vision applications, and the quality of measurement is strongly dependent on the performance of the laser. Lasers are widely used as structured light sources in machine-vision applications. Structured light is light that is shaped into a geometrical pattern such as a dot, dot matrix, line, grid, circle, or other pattern. Incidence of structured light on an object under a defined angle to the optical axis of the imager (typically a CCD or CMOS camera) leads to the deformation of the light structures. From the value and form of the deformation, height information about the object can be obtained.
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