Figure 2

3D view, with z-axis reversed, of the "Euro" symbol.
(a)
Shows the straight lines written on the curved line. (b) Shows the
straight lines written under the curved line (photo and text: Spagnolo et al. 2004 J. Opt. A. 6 869).

3D view, with z-axis reversed, of the "Euro" symbol.
(a)
Shows the straight lines written on the curved line. (b) Shows the
straight lines written under the curved line (photo and text: Spagnolo et al. 2004 J. Opt. A. 6 869).