Patent ID: 7027634
Filing Date: 2006-04-11
Classification: G01B,G01S

Abstract:
1. A system for determining the angular position and distance of a radiating source with respect to a detector, comprising: a) a radiation detector; b) a mask spaced in front of said detector, said mask having a plurality of apertures; c) recording means for recording an image cast onto said detector by radiation passing through said mask; d) computing means for computing data related to said image, said computing means computing a Fast Fourier Transform (FFT) of the image; e) identifying means for identifying a highest single frequency of said FFT of the image, said highest single frequency comprising a spectral peak of said FFT; f) said computing means including means for computing degree of magnification of said image on said detector as compared to size of said image as it passes through said mask by forming a ratio of maximum detected single frequency to known maximum mask single frequency; and g) determining means for determining angular position of said radiation source with respect to said detector.