Telecentric Scanning Lens

Telecentric Scanning Lens Telecentric scanning lenses, similar to Ftheta Lens only difference is that Telecentric maintain normal incidence angle of the beam to the work piece. This ensures that position errors and image distortions are minimized over the entire scan range. Telecentric scanning lenses offer greater depth of field and smaller spot sizes when marking objects for laser material processing. Having a greater depth of field and smaller spot size are important for precision laser micro-machining processes where there is a need to produce fine spot sizes so as to control the width of a laser mark, scribe or drilled hole while maintaining precise placement over a relatively large field. The ability to accomplish this is sometimes affected by just minimal warping of a wafer or solar panel.