De-diffraction methods

Details De-diffraction methods De-diffraction methods

1992-09-15

1995-02-21

Sikes, William L.

Optical: systems and elements

Diffraction

343912, 359562, 359868, G02B 2742

Patent

active

053921550

ABSTRACT:
In optical, microwave, acoustical and other wave fields diffraction spreading and loss of gain is countered by giving the wavefront approaching an aperture a bevelled lip or edge, whereby the radiation spreading inwards from this edge prevents the outward diffraction spreading of the field, and where any aberrations resulting from the de-diffraction process are corrected by methods analogous to those used to correct for spherical aberrations, the result of these adjustments being to cause a field such as that emitted by a lens or laser, to emerge free from diffraction spreading, gaining in resolution beyond the diffraction limits.

REFERENCES:
patent: 3732363 (1973-05-01), Glenn, Jr.
patent: 3770340 (1973-11-01), Cronin et al.
patent: 5148315 (1992-09-01), Tamari

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