Hybrid imaging systems for depth of focus extension with or without post-processing

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

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

We address two different methods to enhance the depth of focus (DOF) according to the application, using amplitude and/or phase masks. The first application consists in increasing the length of the focal line of a lens while preserving its transverse resolution. We propose a mask inspired from holographic principles. We then address DOF enhancement with an hybrid imaging system composed of a pupil mask followed by a digital deconvolution step. We use an optimization criterion based on the final image quality to determine the optimal parameters of phase masks.

Domains: Physics [physics]; Physics [physics]; Optics [physics.optics]

Frederic Diaz, François Goudail, Brigitte Loiseaux, Jean-Pierre Huignard. Hybrid imaging systems for depth of focus extension with or without post-processing. 8th Euro-American Workshop on Information Optics, Jul 2009, Paris, France. pp.012009, ⟨10.1088/1742-6596/206/1/012009⟩. ⟨hal-00749263⟩