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Proceedings Paper

An Analytical Model Of Focal Region Of Conical , Annular Beam -2 - D And 3 - D Cases.
Author(s): Jan Jabczynski; Jurij N. Parchomienko
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Paper Abstract

We proposed in this paper a new approach to analyse a phenomenon of 'free - diffraction beam'. An intensity distribution in focal region of annular beam , which waist is placed in front focal plane of optical system, can be considered as a 'free - diffraction beam'. We worked out a simple, analytical model of propagation of annular beams in optical systems in cylindrically and rotationally symmetric cases. There are examined properties of diffraction field in focal region in both cases .We determined formulae describing dimensions of diffraction fringes and compared them with previous results. The results of calculations in 2-D case can be applied to describe intensity distribution of working field of laser anemometer.

Paper Details

Date Published: 3 April 1989
PDF: 6 pages
Proc. SPIE 1121, Interferometry '89, (3 April 1989); doi: 10.1117/12.961335
Show Author Affiliations
Jan Jabczynski, Institute of Optoelectronics (Ukraine)
Jurij N. Parchomienko, Ucrainian Academy of Science (Ukraine)


Published in SPIE Proceedings Vol. 1121:
Interferometry '89

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