cbnation:
what do you mean exactly with "in a dark field manner"?
It's a studio lighting method to highlight the edges of transparent objects relatively easily - As focalist says the terms light field and dark field are used in microscopy, with slightly different meaning (as far as I understand it). This is a photo I took a few years ago using the technique - I have a more recent one with the filament lit, but it's not on the Internet and I can't find it.
In essence, place your object and frame up your shot. Now, cut a piece of black card so that it only just fills the viewfinder and place it behind the object as the background. Finally, use a large sheet of tracing paper and attach this to the back of the black background card to use as a diffuser. You can also use a softbox or bounce the flash of a (photographically) neutral wall.
When you take the photo, it should light the edges. Tada!
I'll draw a diagram and upload it in a minute.