Sooo
not such a Clever Deicke after all.
Pity Germany’s Fraunhofer Institute. The research organisation best known for devising the MP3 music format seems to be running short of projects to puff. This week it published an item of “research news” about the work of Fraunhofer boffin Frank Deicke, who is employed at Fraunhofer’s photonics lab in Dresden. Herr Deicke is …
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There are 2 light sources being used to achieve that look in the photo - there is a tightly gridded light from up high camera right, pointing down at the device. It's clipping the side of his face and casting the shadow you can see under his chin.
There's another gridded light from low camera left pointing just at his face. It's casting the shadow you can see behind his ear. A grid on a light is modifier used to give you a very tight beam of light with a soft(ish) falloff at the edges and no spill light.
I'd guess they're both small flashes (speedlights) with strong orange gels (2xCTO?) and the camera is set to a tungsten white balance which makes the daylight coming in appear blue.
</photonerd>