Original Article

Experimental Astronomy

, Volume 21, Issue 1, pp 13-22

First online:

High speed photon-counting imager using a position sensitive diode

  • Oliver RyanAffiliated withDepartment of Physics, National University of Ireland Email author 
  • , Mike RedfernAffiliated withDepartment of Physics, National University of Ireland
  • , Andrew ShearerAffiliated withComputational Astrophysics Group, Department of Information Technology, National University of Ireland

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A new use for a 2-dimensional position sensitive diode (PSD) is described. A duolateral PSD was used with a microchannel plate image intensifier as a proof-of-concept photon counting (event driven) imager for astronomical imaging and photometry. This produced an imager capable of counting 25–30 kcps over the astronomical bands B, V & R, with an overall efficiency of ∼19%.


Detectors Position sensitive diode Microchannel plate intensifier Avalanche photodiode High time resolution Imaging