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Products: eXcelon CCD and EMCCD Technology

image of eXcelon CCD and EMCCD Technology

Patented, Breakthrough CCD and EMCCD Technology

Princeton Instruments' patented, breakthrough eXcelon and eXcelon3 technologies radically improve the sensitivity of back-illuminated CCD and EMCCD detectors across a wide wavelength range. Additionally, both technologies significantly reduce 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).

  • Enhanced sensitivity over a broad wavelength range
  • Reduced etaloning - Best fringe suppression in the market
  • eXcelon CCD technology - available in PIXIS and PyLoN camera platforms
  • eXelon3 EMCCD technology - available in ProEM line of cameras


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.


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

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.


Astronomical Imaging
Astronomical imaging can be broadly divided into two categories: (1) steady-state imaging, in which long exposures are required to capture ultra-low-light-level objects, and (2) time-resolved photometry, in which integration times range from milliseconds to a few seconds.

Fusion Research

Bose-Einstein Condensate
Bose-Einstein condensate (BEC) can be regarded as matter made from matter waves. It is formed when a gas composed of a certain kind of particles, referred to as “bosonic” particles, is cooled very close to absolute zero.

Tech Notes

A primer on eXcelon3 EMCCD technology
eXcelon3 is a breakthrough technology that provides the best EMCCD performance available on the market.

A Primer on eXcelon CCD technology
This paper provides a basic overview of the advantages and disadvantages of various types of low-light CCDs and introduces an advanced sensor technology, eXcelon, that mitigates some of their inherent limitations.



ProEM EMCCD Cameras

ProEM EMCCD Cameras

EMCCD cameras for ultra-low light, read noise-limited applications.

PIXIS CCD Cameras for Imaging & Spectroscopy

PIXIS CCD Cameras for Imaging & Spectroscopy

PIXIS CCD cameras play a key role in revolutionary research performed in leading labs around the world.

PyLoN Cameras for Imaging & Spectroscopy

PyLoN Cameras for Imaging & Spectroscopy

PyLoN high-resolution front-illuminated, back-illuminated, & back-illuminated deep-depletion imaging & spectroscopy CCDs.

Princeton Instruments