Increase in depth of field taking into account deconvolution by optimization of pupil mask

Frederic Diaz (1, 2) , François Goudail (2) , Brigitte Loiseau (1) , Jean-Pierre Huignard (1)

1 Thales Research and Technology [Palaiseau]
2 Laboratoire Charles Fabry de l'Institut d'Optique / Scop

We consider optimization of hybrid imaging systems including a phase mask for enhancing the depth of field and a digital deconvolution step. We propose an image quality criterion that takes into account the variability of the system's point spread function along the expected defocus range and the noise enhancement induced by deconvolution. Considering the classical cubic phase mask as an example, we show that the optimization of this criterion may lead to filter parameters that are significantly different from those usually proposed to ensure the strict invariance of the PSF.

Domains: Optics [physics.optics]

Frederic Diaz, François Goudail, Brigitte Loiseau, Jean-Pierre Huignard. Increase in depth of field taking into account deconvolution by optimization of pupil mask. Optics Letters, 2009, 34 (19), pp.2970-2972. ⟨hal-00746985⟩