Shaded-Mask Filtering for Extended Depth-of-Field Microscopy
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Shaded-Mask Filtering for Extended Depth-of-Field Microscopy

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Shaded-Mask Filtering for Extended Depth-of-Field Microscopy

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Escobar García, Isabel María; Saavedra Tortosa, Genaro; Martínez Corral, Manuel Perfil; Calatayud, Arnau; Doblas Expósito, Ana Isabel
Aquest document és un/a article, creat/da en: 2013

Este documento está disponible también en : http://dx.doi.org/10.6109/jicce.2013.11.2.139
This paper proposes a new spatial filtering approach for increasing the depth-of-field (DOF) of imaging systems, which is very useful for obtaining sharp images for a wide range of axial positions of the object. Many different techniques have been reported to increase the depth of field. However the main advantage in our method is its simplicity, since we propose the use of purely absorbing beam-shaping elements, which allows a high focal depth with a minimum modification of the optical architecture. In the filter design, we have used the analogy between the axial behavior of a system with spherical aberration and the transverse impulse response of a 1D defocused system. This allowed us the design of a ring-shaded filter. Finally, experimental verification of the theoretical statements is also provided.

    Escobar, Isabel Saavedra Tortosa, Genaro Martínez Corral, Manuel Calatayud, Arnau Doblas Expósito, Ana Isabel 2013 Shaded-Mask Filtering for Extended Depth-of-Field Microscopy Journal of information and communication convergence engineering 11 2 139 146
http://dx.doi.org/10.6109/jicce.2013.11.2.139
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