In an embodiment, the invention provides a method of de identifying an object data. Output power, beam divergence, and boresight stability of the laser are thus maintained. The coating layer is an oxide which contains lithium and at least one of nickel and manganese. User interactions with the application are captured during the session and associated with the unique identifier. A linear array of LEDs is arranged such that the linear focal axis passes through the area of light emission of each LED.