Patent ID: 6396060
Filing Date: 2002-05-28
Classification: G01J

Abstract:
A method for detecting the presence of radiation from an aircraft collision avoidance lighting source in the presence of background radiation of the same or greater order of intensity as the intensity of said source, which comprises the steps of modulating the radiation produced by said source so that said radiation from said source has a characteristic unique to the modulation thereof, and detecting said radiation from said source in the presence of said background radiation while discriminating against said background radiation which does not have said unique characteristics, wherein said discriminating step is carried out by providing an electric signal corresponding to said radiation, and further wherein said radiation from said source occurs in bursts or pulses, and filtering said signal by translating during said filtering said electric signal into another signal which corresponds to a plurality of cycles of said modulation during said pulses or bursts by causing ringing in response to said pulses or bursts in said filtering step.