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Target localization based on wavelength multiplexing

We present a method to localize a target in the three-dimensional space. The use of a white light optical correlator that gives us a different response depending on the scale of the input image permits to know the depth position of the particular target, since each different depth position of the target produces an image of different size when captured with a CCD camera. The setup is based on wavelength multiplexing since each different depth position, or analogously, each different scale in the captured image is detected with a different wavelength in the correlation plane.