720 ILCS 5/2-10.2: Laser or laser device.

"Laser" or "laser device" means any small or hand-held battery powered device which converts incident electromagnetic radiation of mixed frequencies to one or more discrete frequencies of highly amplified and coherent visible radiation or light. Proof that a particular device casts a small red dot or other similar small and discrete image or small and discrete visual signal upon a target surface at least 15 feet away creates a rebuttable presumption that the device is a laser. Flashlights and similar lamps, lanterns, lights, and penlights are not laser devices.