Commissariat a L'energie Atomique Et Aux Energies Alternatives

Centre National De La Recherche Scientifique

Patrick Mercier

Pierre Chavel

François Goudail

Pierre-Antoine Frugier

A method of designing an imaging system including an optical system having a longitudinal optical axis, an image sensor and a spatial filter, the imaging system being configured to form an image of a focusing plane on the image sensor. The optical transfer function of the optical system combined with the spatial filter is calculated as a function of the image spatial frequencies, and of the focusing defect (&#x3a8;), so as to determine a contrast map and a phase map of the optical system combined with the pupil function of the spatial filter, the contrast map and the phase map being a function, of the spatial frequency (f), and of the focusing defect (&#x3a8;), and it is determined, based on these maps, a value of longitudinal extension (|P|) of the imaging system focusing depth domain in the useful range of spatial frequencies ([&#x2212;fc; fc]) and an average contrast.

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Orsay, France

Patrick Mercier