Authors
Citation
U. Vokinger et al., Unconventional treatment of focal shift, OPT COMMUN, 157(1-6), 1998, pp. 218-224
Citations number
14
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Optics & Acoustics
Journal title
OPTICS COMMUNICATIONS
ISSN journal
00304018
→ ACNP
Volume
157
Issue
1-6
Year of publication
1998
Pages
218 - 224
Database
ISI
SICI code
0030-4018(199812)157:1-6<218:UTOFS>2.0.ZU;2-2
Abstract
We present an unconventional approach for the explanation of focal shift be
hind a lens. It is based on the fact that, within the approximation of Fres
nel diffraction, the intensity distributions in the conjugate planes of a l
ens are equal to their geometrical images. We show that the focus (position
of highest intensity) is always shifted towards the lens. The results for
a Gaussian beam and a uniform converging spherical wave are presented. (C)
1998 Elsevier Science B.V. All rights reserved.