Holo-Or introduces The VL series Vortex lenses that transforms a planar wavefront into a helicoid wave. Substrates consist of either pure fused silica or ZnSe with an optional high power AR V-Coating on both surfaces, which makes them superior to competing solutions. This can reduce the back reflection to a typical 0.2% (0.1% per surface).
The Vortex Lens has a variety of applications. Some of them can be found at www.u.arizona.edu/~grovers/SO//so.html
The standard wavelengths offered include 800 nm, 1064 nm and 10600 nm. There are a few levels available that determine the diffraction efficiency to be from ~77% to ~95%. Standard diameters are 25.4 mm and 11 mm.
In the image one sees a false colour image of the surface profile of a Vortex lens having 16 levels.
