Laser Perforation: The Diffractive Beamsplitter Advantage
Mar 8, 2009 — Perforated thin sheets of material are required in many applications, including plastic and metal sheets in the packing industry, cartons and metal foil that enable easy tear-off, filters for cigarettes, tubes for liquid or gas drainage, and preweakening of metal sheets for automobile air bags.The basic setup in laser perforation includes a pulsed laser, a lens and either a moving mirror, a rotating web or both. Each laser pulse creates a hole in the material. During the blank time in which...