Abstract

A superresolving optical system with a spatial resolution exceeding the classical limit is described. The gain in spatial bandwidth is obtained by reduction of the usable object field. The superresolving system is essentially a conventional system modified by the insertion of two masks (line or crossed gratings) into conjugate planes of object and image space. Its spread and transfer functions for coherent and incoherent illumination are derived theoretically. The experiments with different extended objects clearly show the expected increase of the spatial bandwidth; the experimental point images agree with the theoretical predictions.

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  1. W. Lukosz, J. Opt. Soc. Am. 56, 1463 (1966).
  2. This result is valid for low apertures and small angles of deflection at the masks. The aberrations of the superresolving system, which in general appear if the aperture and deflection angles are large, have not yet been investigated.
  3. In a real microscopic arrangement there would be a high magnification between the object and the intermediate image plane, and between the planes of M and M'. So the lens behind the intermediate image would have to transmit low spatial frequencies only; the mask M' would have to be correspondingly coarser than M.

Lukosz, W.

W. Lukosz, J. Opt. Soc. Am. 56, 1463 (1966).

Other

W. Lukosz, J. Opt. Soc. Am. 56, 1463 (1966).

This result is valid for low apertures and small angles of deflection at the masks. The aberrations of the superresolving system, which in general appear if the aperture and deflection angles are large, have not yet been investigated.

In a real microscopic arrangement there would be a high magnification between the object and the intermediate image plane, and between the planes of M and M'. So the lens behind the intermediate image would have to transmit low spatial frequencies only; the mask M' would have to be correspondingly coarser than M.

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