Ensquared Energy and Optical Centroid Efficiency in Optical Sensors: Part 1, Theory

High-performance megapixel focal plane arrays with small pixels have been widely used in modern optical remote sensing, astronomical, and surveillance instruments. In the prediction models applied traditional instrument performance analysis, image of a point source is assumed to fall on center detector pixel. A geometrical realistic system may actually any position pixel because sensor’s line sight includes pointing errors jitter. This assumption lead an optimistic error, estimated at between 10% 20%. We present critical factors that impact estimate design based for noise-equivalent power (NEP). They are centroid efficiency (OCE) ensquared energy, or more precisely, energy rectangular (EOD). performed simulation studies imaging without generalized central obscuration.