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An Overview of EM Gain Ageing in EMCCD Sensors

When EMCCD cameras were first introduced they enabled a level of detector performance with a level of raw sensitivity that remains unsurpassed to today.

Figure 1:The iXon Life and Ultra EMCCD cameras are the latest
EMCCD imaging cameras offering the best performance from EMCCD.
These models follow many years of development and refinement
of the technology in previous models.

As with any new technology there were many questions about this new sensor technology, specifically around the unique feature of “EM gain” and technical challenges on how to best implement it in camera designs. In this article we look at the features introduced for the iXon EMCCD camera series that have addressed these challenges and helped iXon EMCCD cameras become the gold standard in EMCCD.

For a general introduction to what is EMCCD and EM gain and how they work please see the article: What is an Electron Multiplying CCD (EMCCD) Camera.

EM Gain Linearity solved with RealGain™

For early EMCCD cameras the EM Gain that was selected in the software did not have a linear relationship with the real gain applied by the camera. While this has long been resolved, and the solution appears quite logical, initially at least this non-linear response made it more difficult for users to make the kind of quantitative measurements that these cameras were finding use in.

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