Powell prism

Powell prism is an optical scribing prism, which enables the laser beam to be optimally scribed into a straight line with uniform optical density, good stability and good linearity after passing through. Powell prism scribing is superior to the scribing mode of cylindrical lenses, eliminating the central hot spot and faded edge distribution of Gaussian beams.

When a Gaussian laser beam passes through an ordinary cylindrical lens, it will produce unevenly distributed straight lines, while the top of the Powell prism is a complex two-dimensional aspheric surface, and a large amount of spherical aberration will be generated when the laser passes through, redistributing the light path and reducing the central area. The light at the edge is increased to form a uniform straight line, which is suitable for various machine vision applications such as biomedicine, automobile assembly, and food processing.