Following the propagations, the complex amplitude at the pupil plane is obtained. This is multiplied by the camera aperture mask , and a collimation-type phase compensation is used to allow the lens operation to focus the image at the focal length. This yields Display Formula
(22)The incoherent PSF can be found based on Eq. (22) and is given by19Display Formula
(23)where and is the Fourier transform. In practice, the PSF is evaluated discretely using the FFT and then resampled to the focal plane Nyquist spacing for the camera. We also normalize the discrete PSFs to all have a sum of 1.7 The final simulation output is computed with a spatially varying weighted sum as Display Formula
(24)where is the ideal discrete object image, and is the Nyquist sampled discrete PSF associated with object sample .