Abstract: Various embodiments relate to an apparatus, method and a non-transitory computer readable medium for fringe detection and mitigation in an image using Hilbert-Huang Transform (“HHT2-Fringe”) configured to apply Empirical Mode Decomposition (“EMD2”) to a measured light intensity suppression to generate bi-dimensional intrinsic mode functions (“BIMFs”), apply Hilbert Spectral Analysis (“HSA2”) to analyze a plurality of outer fringe bright bands of the BIMFs, propagating the amplitudes of the plurality of outer fringe bright bands of the BIMFs into the center of the image using linear approximation, determine fringe magnitudes of the BIMFs, adding the magnitudes of the BIMFs and subtracting the difference from magnitudes of a petal area of the image.

Abstract: Aspects of the present disclosure involve a system and method for suppressing a Poisson spot. A Poisson spot is a bright spot in the geometrical shadow of circular/spherical shapes. A broad class of telescopes that involve simultaneous transmit and receive require suppression of the reflected light from the secondary mirror on the detector. In one embodiment, coronagraphy petal-shaped masks are fabricated using photolithography and wire-EDM for the suppression of the Poisson spot. The petal-shaped masks can be designed and fabricated to operate at varying Fresnel numbers and petal tip radius-of-curvature (ROC).