US Patent 10182485 Lens structure for high intensity LED fixture

A lens structure for a light emitting diode (LED) lighting fixture includes one or more lenses, each of which is configured to be located over an LEDs of the lighting fixture. Each lens includes a bowl-shaped collimator, an air gap positioned over the dome and extending into a first end of the collimator, and a core positioned over the air gap and extending into an opposing second end of the collimator.