A device and method for estimating a phase reference or a phase shift of a S1 with respect to another reference signal S0. The two-step method consists of a pre-heating step and at least one foaming step. The imprint lithography system is configured to dispense an activating light curable liquid onto a substrate or template. Template matching logic template matches the input image and generates a template likelihood image output indicating where the ball is in the grayscale image. The module can be integrated into the outlet, partially housed in the outlet, or attached externally to the outlet.