Observational analysis improves central intensity and reduces dark ring radius in optical systems, suggesting better performance against aberrations.
The point spread function (PSF) of an optical system apodized with a Hanning amplitude filter, featuring a central circular obscuration (ε = 0.4 & 0.5), is analyzed in the presence of primary spherical aberration and defocus. The primary objective is to enhance the intensity in the central lobe, suppress the side lobes, and reduce the radius of the first dark ring. It is observed that when the apodization parameter is set to β=1, the central maximum intensity increases, and the radius of the first dark ring is minimized, even under significant spherical aberration and defocus
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Shailaja et al. (2025) studied this question.
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