A system and method for stunning live poultry is presented. A linearity compensation circuit 8 is inserted upline from the tuner 7. The accounting records are parsed to a first adapter where they are then published on an active information bus. The fin has a predetermined heating surface chosen in accordance with a predetermined temperature gradient in a longitudinal direction of the exhaust pipe, and is located on only upper portion side on an inner surface of the exhaust pipe. The cycle includes the steps of: etching the layer of particles, using a first etching process so as to reduce the size of the particles within the layer, then; simultaneously etching the optical layer and the layer of particles, using a second etching process, the further reducing particles forming a mask over areas of the optical layer to create discrete optical elements from the optical layer.