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Princeton Instruments
eXcelon Techology
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Technology Sensor Type Architecture Download the Tech Note
eXcelon3 Back-illuminated EMCCD Custom thinned eXcelon3 Tech Note
eXcelon Back-illuminated CCD Thinned or deep depletion eXcelon Tech Note

Princeton Instruments' eXcelon breakthrough technology radically improves the sensitivity of back-illuminated CCD detectors across a wide spectrum, from 200 nm to 1100 nm. It also significantly reduces etaloning, the problematic appearance of fringes attributable to constructive and destructive interference in a device’s back-thinned silicon while imaging in the NIR region (750 to 1100 nm). eXcelon is available in PIXIS and PyLoN models

PI now offers the next generation of eXcelon!
eXcelon3 is specifically developed to enhance the performance of EMCCDs. Although traditional back-illuminated EMCCDs are capable of single-photon sensitivity, they lack sufficient QE in the UV and NIR regions and suffer from etaloning (fringing) in the NIR region. New eXcelon3 greatly reduces both limitations, making these next-generation EMCCDs viable options for applications requiring broad UV-to-NIR sensitivity. eXcelon3 detectors provide a peak QE of ~95% (at 650 nm) and 1.1x to 2.5x more sensitivity at specific wavelengths in the UV and NIR regions. In addition, they have been measured to reduce peak-to-peak fringe amplitude below 10%. The new sensors are also available with Princeton Instruments’ Unichrome UV coating to enhance sensitivity below 350 nm.

eXcelon3 technology is available in Princeton Instruments’ ProEM+ series of deep-cooled EMCCD cameras, with 512 x 512 and 1024 x 1024 pixel formats and 1600 x 200 and 1600 x 400 for spectroscopy applications. These new eXcelon3-enabled cameras will target a wide variety of applications in both the life sciences and physical sciences, including Bose-Einstein condensate (BEC) imaging, astronomy, live-cell imaging, scanning confocal spectroscopy, single molecule spectroscopy, among others

Key Features and Benefits

eXcelon for Back-illuminated CCDs

- Enhanced Sensitivity - Higher QE

eXcelon3 for Back-illuminated EMCCDs

- Enhanced Sensitivity - Higher QE

Enhanced QE for eXcelon3


Reduced Etaloning

CCD PIXIS etaloning- Comparison of Standard Back-Illuminated CCD vs. eXcelon BI CCD



EMCCD etaloning - Comparison of Competition vs. eXcelon3 Back-Illuminated EMCCD -
eXcelon3 Has No Equal!

Video above shows the reduction in etaloning provided by eXcelon3 back-illuminated EMCCDs (right) compared
to less-sophisticated back-illuminated EMCCD designs (left).


Video above shows improvement in etaloning of eXcelon3 back-illuminated EMCCDs (right) over less-sophisticated
back-illuminated EMCCD designs (left).



- Download eXcelon Tech Note

- Download eXcelon3 Tech Note

choose an eXcelon-enabled camera

Watch the eXcelon video

Choosing the Right Camerachoose an eXcelon-enabled camera