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Super resolution and Dammann gratings

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Abstract

The resolution of a system is defined as the finest detail that can pass through the system without being distorted. The motivation of the super resolution field is to handle the non resolved details using a given apriori information about the input signal [1], e.g. apriori knowledge on: object shape, temporal behavior, wavelength behavior, dimensions and polarization. The super resolution effect is achieved by exchange of degrees of freedom. For instance, let us assume that the spatial aperture of a system is small and some of the signal's information is lost due to this fact. If it is also apriori known that the signal's information is monochromatic, one may convert part of the spatial information into wavelength information, in such a way that the aperture of the system is synthetically expanded. Based on the distinction between the signal information and system's capabilities one may adapt the space bandwidth function (SW) of the signal to the SW function of the system using the Wigner chart [1].

© 1998 Optical Society of America

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