I think Path is correct that some ships in B5 (such as the
Excaliber have something that works virtually identically to the SE shield system - Something like "eighty percent of the energy weapons' impact is diffused back out into space." This is NOT like Se armor, it is like SE shields - the value of the armor doesn't decrease until it is destroyed.
Since the
Excaliber is based partially on Minbari tech (and thus partly on Vorlon) it is entirely reasonable to assume that the Vorlons have something like this, only much better. And if they had it, then it was likely available to the other Ancients as well.
I would, of course, be every careful about using that "eighty percent" figure!
