Biomedical Engineering Reference
In-Depth Information
Figure 7.5
IntensitydistributionsforthegammadionpatternforFig.7.3(c)
(
θ
r
=
120
◦
) are shown in (a-b), and for Fig. 7.3(e) (
θ
r
=
30
◦
) are in (c-d).
All other conditions are the same as in Fig. 7.4.
for the case of the acute angle in Fig. 7.5(c) and (d), a brighter
central intensity can be observed in the case of the RCP incidence
as in Fig. 7.5(c). On the contrary, distributed brighter regions at the
ends of the wings for the LCP incidence are observed in Fig. 7.5(d).
Therefore, the sense of co-directionality between the SAM and the
helicity of geometry to 'focus' the field to the center [19] is reversed
in this acute structure.
For the limitation in length, we do not show the time-dependent
evolutionofthefielddistributionsinthischapter.However,ifweob-
serve the time-dependent responses for the gammadion apertures
inFig.7.3,thedifferencesintheresponsesbetweenobtuseandacute
wings become more clear. The most distinct contrast between these
patternsisthatthetime-dependentlocationsofthepeaksinthefield
transmissions evolvein different directions for these bentangles.
