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EM N2 – LN2 cooled EMCCD

Built for long exposure times

A highly customizable platform for CCD & EMCCD sensors, powering your project with Nüvü’s signature electronics.

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Outstanding SNR performances

Cooled down to –110ºC for the longest exposures
Down to < 0.001 ē/pixel/frame background noise
EM gain up to 5000
Up to 10 MHz readout for fast acquisitions

The liquid nitrogen-cooled EMCCD & CCD camera

With the highest signal-to-noise ratio for photon-counting imaging applications

Thanks to cooling down to -110°C, the EM N2 camera line generates the least amount of dark current. Combined with Nüvü’s patented CCCP technology to significantly reduce clock-induced charges, this EMCCD camera provides unmatched sensitivity for long exposures. The highly personalized EM N2 camera supports 3 standard EMCCD detector sizes (128, 512 and 1024) in addition to custom sizes CCD and EMCCD detectors for specific requirements.

Highest quantum efficiency

The EMN2 camera line is available with scientific-grade back-illuminated EMCCD detectors offering a high QE (up to 95%). Additionally, it supports all CCD and EMCCD sensor formats provided by high-end detector manufacturers. Midband coatings are available for all standard EM N2 models.

Typical spectral response as a function of wavelength, as specified by the EMCCD detector manufacturer

EM N2 128

The EM N2 128 camera is also available with UV-enhanced detectors or a UV Lumogen® coating for higher quantum efficiency in the UV spectral range.

Typical spectral response as a function of wavelength, as specified by the EMCCD detector manufacturer

EM N2 512 & EM N2 1024

The EM N2 512 & EM N2 1024 cameras are also available with a Low fringing detector, UV Lumogen coating or a Blue Enhanced sensor for higher quantum efficiency in the blue and UV spectral region.

What cooling temperature?

The EM N2 liquid nitrogen cooling system offers flexible means to optimize sensors’ performances: the ability to cool all the way down to -110 °C allows users to attain their desired balance between dark current and charge transfer efficiency (CTE). The very best image quality can be attained via adjustable cooling temperature with any high sensitivity sensor — even those of non-standard or custom size ratios.

Example of mROI on NüPixel Software

Features for faster acquisition

  • Binning
  • Crop Mode
  • Variety of pixel rates
  • Multiple Region of Interest (mROI) & ROI

Designed for easy integration

The user-friendly EM N2 provides many advantages to efficiently bridge the gaps between purchase, setup, discoveries and publications.

The EM N2 camera is an easy-to-use device made for Windows or Linux operating systems. To allow quick and easy integration into a system, the EM N2 camera comes with a C-mount optical interface and mounting slots. For fast and reliable image data transmission, the EM N2 camera offers data transfer through either Gigabit Ethernet or Camera Link. A built-in shutter enhances detector longevity, allows dark frame acquisitions, and is remotely controllable with our software for all application requirements.

Options available

Further customize the camera to your requirements for improved performances in your measurement contexts and increased versatility.

A variety of options are available.

See options

Related publications

Read more on new researches and science enabled by this innovative scientific camera.

Fully integrated services

NüPixel Software
Software tool

NüPixel control, acquisition and analysis software

Software development kit (SDK) for customizable programming

Windows & Linux compatibility

Various drivers available for commercial software

Worldwide professional customer support

In addition to an intuitive user manual for the easy installation and use of our products, Nüvü Camēras offers international on-site training as well as complete consulting services. Our team’s passion is the development of the ultra low-light imaging field; as such, we provide a variety of services to efficiently minimize the delay between purchase and discoveries.

Nüvü Camēras is a Canadian company specialized in designing and manufacturing novel EMCCD cameras for fields where the drive for cutting edge instrumentation propels innovation. We improve imaging performance for a number of fields including biomedical research, astronomy, photonics and more. As such, our cameras benefit from extended warranty policies. Basic warranty is 2 years on all parts and labor (subject to the terms and conditions expressed in the respective products’ user manuals).

Extended warranty options also available.

Darker EMCCD — Less noise

The darkest EMCCD cameras are manufactured by Nüvü Camēras. The secret? The CCD Controller for Counting Photons (CCCP), an innovative technology that virtually suppresses clock-induced charges (CIC), and a cooling Peltier unit integrated into an ingenious packaging. The thermoelectrically cooled HNü camera operates between -60 and -90°C with outstanding precision to optimize CIC and dark current to their ground level. The images below illustrate the accumulation of dark current when the shutter is closed. The darker the image, the less noise is present.

With Nüvü Camēras' EMCCD technology With Nüvü Camēras' EMCCD technology
Acquisition conditions: -85 °C cooling, 10MHz readout speed, EM gain of 5000 for Nüvü Camēras, and 1000 for other EMCCD manufacturers.

No pixel leaking, superior image quality

At high readout speeds, the electron transfer from one potential well to the next may be incomplete, leaving a few charges behind. Consequently, the leftover electrons artificially increase the brightness of certain pixels, thereby diminishing the overall image quality with the addition of arbitrary blurry spots. However, Nüvü Camēras’ CCCP preserves charge transfer efficiency (CTE), even at low operating temperature and increased EM gain, while decreasing CIC, yielding highly superior image quality.

Nüvü Camēras EMCCD technology Nüvü Camēras EMCCD technology
Acquisition conditions: -85 °C cooling, 10MHz readout speed, EM gain of 5000 for Nüvü Camēras, and 1000 for other EMCCDs.

New standard for photon-counting imaging cameras

As stated in its name, Nüvü Camēras’ proprietary CCD Controller for Counting Photons was purposely designed for photon-counting imaging. As such, no noise-filtering algorithms are used. The amount of noise generated is simply lower, eliminating the risk of removing genuine photoelectrons.

Resorting to arbitrary clocks rather than regular square clocks to shift the electrons through the EMCCD, the CCCP clamps down the generation of clock-induced charges and significantly reduced the detector’s total background noise. Consequently, the EMCCD ability to discriminate single-photon events is considerably increased, and the camera can effectively operate in photon-counting mode as long as the background noise is low.

In extreme cases where the expected intensity is about a single photon per pixel per second or even less, the photon counting (PC) mode is the ideal solution to obtain high-quality images. By eliminating the excess noise factor (ENF) and using a statistically significant threshold, pixels are individually analyzed to determine whether or not they truly detected a photon despite various noise sources.

Displayed below are images of extremely dim light sources — low concentration bioluminescent samples — and illustrate the power of photon-counting imaging in such conditions. All figures are courtesy of the Université de Sherbrooke Hospital Centre.

Single 30 seconds acquisition in conventional (CCD) mode. No details are visible where we should have seen several bioluminescent ATP samples.

Applying electron multiplication to suppress the readout noise reveals the bioluminescent ATP samples in 5 seconds. As such, all six ATP concentrations are detectable with SNR values varying from 1.9 to 14.1 (or, equivalently, 2.8 dB to 11.5 dB).

Photon counting mode with an EMCCD increases the contrast of all ATP samples by suppressing the excess noise factor (ENF), thus allowing considerable improvements in image quality. The SNR increases from 6.6 to 51.3 (equivalent to a range of 8.2 dB to 17.1 dB).

Ready to count Photons?

Any questions about EMCCD or low light imaging? Nüvü Camēras experts can provide advices on your low light imaging options.

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