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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 40, Iss. 13 — May. 1, 2001
  • pp: 2138–2147

Theoretical and experimental investigations of the effect of diffractive multifocal focusing of radiation

Renat R. Letfullin, Oleg A. Zayakin, and Thomas F. George  »View Author Affiliations


Applied Optics, Vol. 40, Issue 13, pp. 2138-2147 (2001)
http://dx.doi.org/10.1364/AO.40.002138


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Abstract

The new optical effect of diffractive multifocal focusing of radiation, predicted earlier by theory, on a bicomponent diffraction system with small Fresnel numbers that consists of two plane screens with circular apertures on given optical axes, is confirmed experimentally. It is shown that the diffraction picture in the focal planes of such a system represents the circular nonlocal bands of the Fresnel zones with a bright narrow peak at the center, whose intensity in the experiment can exceed by six to ten times the value of the incident plane-wave intensity. Experimentally it is established that the diffractive multifocal focusing of radiation on real screens with axial circular apertures, whose diameters exceed the radiation wavelength, is insensitive to the rough external conditions: thickness of the screens, irregularities of the edges and nonideal form of the apertures, heterogeneity of the initial distribution of the incident-wave intensity, and changes in the medium of the wave propagation.

© 2001 Optical Society of America

OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(050.1970) Diffraction and gratings : Diffractive optics
(080.3620) Geometric optics : Lens system design
(220.2560) Optical design and fabrication : Propagating methods
(220.3630) Optical design and fabrication : Lenses
(220.4830) Optical design and fabrication : Systems design

History
Original Manuscript: October 1, 2000
Revised Manuscript: January 2, 2001
Published: May 1, 2001

Citation
Renat R. Letfullin, Oleg A. Zayakin, and Thomas F. George, "Theoretical and experimental investigations of the effect of diffractive multifocal focusing of radiation," Appl. Opt. 40, 2138-2147 (2001)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-40-13-2138

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