Fig. 4.
Left: A spatially and angularly sparse phantom—uniformly spaced single dipoles with varying orientations (increasing ϑ from left to right and increasing φ from bottom to top). White crosses mark the positions of the dipoles. Center: Scaled irradiance for an imaging system with NA = 0.75, λ = 500 nm, and no = 1.33 sampled at 20× the Nyquist rate. Right: x profiles through the scaled irradiance. The response is independent of the azimuth angle and strongly dependent on the inclination angle.