Real-time photoelectron event-detecting video system

R. H. Macklin, E. K. Hege, P. A. Strittmatter

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


We describe a system for localization of photoelectron events utilizing an intensified Plumbicon camera and a Grinnell video digitizer. The Grinnell digitizer, arithmetic unit and memory are used to produce a real-time video difference between current pixel value and previous pixel value thereby suppressing multiple detection of the same event. A master clock provides synchronization with the camera in operation at 60 Hz in 240 lines/field, repeat field mode. Our event-localization scheme provides double-buffered line-address and event-amplitude for up to 32 events along a 512 pixel video line. A software algorithm allows localization of multiple detections of the same event, and provides a unique address interpolated with 1/2 line resolution by the host minicomputer in a 480 x 512 format.

Original languageEnglish (US)
Pages (from-to)135-138
Number of pages4
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - Mar 17 1983

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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