High sensitivity time delay integration TDI mode

The HNü TDI camera provides exactly what is to be expected from a high-end CCD TDI camera: virtually no noise. The TDI readout mode allows for a longer exposition period positively impacting the image quality. Integrating the patented CCD Controller for Counting Photons, it creates fewer clock-induced charges than other CCD cameras. In short, it is the finest camera for demanding scanning applications.

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Outstanding low-light scanning performance

Line rate up to 103 KHz

Resolution of 4424 (H) x 128 (V) pixels

Readout noise lower than 45 electrons

The HNü innovative packaging ensures optimal chip operations at -85 °C with air cooling

Time-Delay Integration TDI Principles

A readout mode based on the concept of the accumulation of cumulative exposures of the same object as it is moving linearly under the detector. It synchronizes the transfer of the charges from one line to the next with the same speed as the object is moving under the camera:

  • Example of imaging the word NÜVÜ using TDI Readout mode. The intensity of the signal in increased as the word moves across the detector TDI Reading

 Highest quantum efficiency

In order to detect the most photons, CCD cameras must optimize the total effective quantum efficiency (QE). In turn, this critical parameter is influenced by the sensor’s quantum efficiency.

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

QE Typical spectral response

HNü TDI quantum efficiency.

Optimal sensor window

Choosing the right window is critical to select the perfect camera for a given application. The window is optimized for signal transmission with respect to the detector’s bandwidth.

The window may alter the consistency of the photon wavelengths transmitted to the detector. Nüvü Camēras uses at least λ/10 quality windows, mandatory for optimal image quality.

Built for easy integration

Combining small size with full controller integration makes the HNü camera a compact and easy-to-use device. Standard C-mount, holes on the face plate, and standard holding posts on the sides of the camera allow quick and easy integration into any system. The HNü camera also offers data transfer through either Gigabit Ethernet or Camera Link for fast and reliable image data transmission.

Besides, the HNü requires no maintenance with its vacuum-sealed thermoelectric cooling system. All parts are treated in compliance with high vacuum specifications, including sealing all in a 10,000-class cleanroom to ensure the longest vacuum lifetime without maintenance.

Spec Sheet


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Any questions about this product or low light imaging? Nüvü Camēras experts can provide advices on your low light imaging options. Please feel free to contact our experienced application scientists for more information.

Fully integrated services

Software tools

The NüPixel software is designed as a user-friendly tool for intuitive control, acquisition, and analysis of any snapshots and sequences acquired with all Nüvü Camēras products.

For customizable programming, a complementary software development kit (SDK) is included. A variety of drivers for third-party software, as well as consulting services, are also available.


In addition to an intuitive user manual for independent installation and use of our products, Nüvü Camēras offers international on-site training as well as complete installation 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 future discoveries.


Nüvü Camēras is a Canadian company specialized in designing and manufacturing novel EMCCD and CCD 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 includes a 2-year warranty on all parts and labor (subject to the terms and conditions expressed in the respective products’ user manuals).

Extended warranty options are also available on demand.


Darker EMCCD — Less noise

Nüvü Camēras manufactures the darkest EMCCD and CCD cameras. The secret? Its 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 -85 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.

Nüvü Camēras EMCCD technology Other EMCCDs

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

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. Other EMCCDs.

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

Best camera for photon-counting imaging

As stated in its name, the CCD Controller for Counting Photons was purposely designed for photon-counting imaging. Resorting to arbitrary clocks rather than regular square clocks to shift the electrons through the EMCCD, the controller 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 de power of photon-counting imaging in such conditions. All figures are a 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).