Dark-Field Lighting 1
Strobist info: (also see graphic below in comments) the base is a piece of black opaque glass with a black foam core background. Light from a strobe is passing through a white diffuser (white sheet) and coming from the sides of the foam core on the left and right. Foam core gobos also on the left and right to let just a sliver of light on both sides. I was able to eliminate 99% of the front reflection, fixed a tiny bit in Photoshop.