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Stress Birefringence for Extended Depth of Focus Imaging

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Abstract

A stressed element with six fold symmetry can apodize a pupil with a superposition of positive and negative spherical aberrations. The point spread function for this system shows two marginal foci symmetrically separated from the paraxial focus, suggesting the possibility of using this type of element for extended depth of focus imaging.

© 2010 OSA, SPIE

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