Figure 2 - Two-dimensional array of telescopic pixels (looking from the primary mirror side).
From the following article
Anna L. Pyayt, Gary K. Starkweather & Michael J. Sinclair
Nature Photonics advance online publication Published online: 20 July 2008
doi:10.1038/nphoton.2008.133

Pixels are placed next to each other so that the maximum possible fill factor of 78% is achieved. The picture is taken using a digital camera mounted on a microscope.
