Single-photon detector electronics board from QPN 5505 commercial quantum key distribution system
The actual components detecting photons, avalanche photodiodes, are in a separate box which is not included in this photo. This is the rest of detector electronics... unnecessarily complex in our view, but we did not design it :).
This picture from Cracking commercial quantum cryptography gallery and Quantum hacking lab gallery is included in Picture Collection on Photo Pages.
Taken on January 26, 2010.
Canon EOS 20D digital camera, ISO 100, f/32 6 sec, tripod.
©2010 Lars Lydersen, Vadim Makarov. Image usage rules apply.