20 Mar 2019 The Powell lens is aquantum leap forward in line generator performance over the simple cylinder lens.A cylinder lens produces a poorly illuminated line, one limited by the non-uniform,Gaussian laser beam.The Powell lens' rounded roof is in fact a complex two-dimensional aspheric curve that generates a tremendous amount of spherical aberration that redistributes the light along the line;decreasing the light in the central area while increasing the light level at the line's ends. The result is a very uniformly illuminated line used in all manner of machine vision applications;from bio-medical and automobile assembly to chocolate chip cookie production. |
