Lowest background noise together with highest EM gain
The HNU camera line includes key components that altogether produce the lowest background signal, critical for extremely faint source imaging:
- HNU’s unique packaging, with material and assembly in compliance with ultra-high vacuum requirements, and thermoelectric air-cooled unit guarantee a stable -85 °C chip temperature within a 0.01 °C margin, even using the camera entire imaging area at a 20MHz pixel rate. Doing so decreases the dark noise signal while guaranteeing optimal charge transfer efficiency (CTE) throughout the EMCCD.
- The CCD Controller for Counting Photons (CCCP), a Nuvu Cameras patented technology, decreases clock-induced charges, which dominate the noise level at high speed, while operating the camera in inverted mode of operation (IMO) reduces dark current. To this end, all Nuvu™ cameras are driven in IMO mode.
Better, Nuvu Cameras’ technology uses no noise-filtering algorithms; it is rather the camera’s intrinsic noise that is essentially lower. This is of great importance, given that noise filtering may remove genuine photons while processing the image.
Nuvu Cameras’ CCCP controller also provides the highest EM gain - up to 5000 - for the lowest readout noise while decreasing the background noise for superior detection in low light imaging.
Below are the total background noise levels of each of the 3 HNU models.
Up to 20MHz for faster acquisition
Binning, selectable and customizable multiple regions of interest (mROI), cropped-sensor mode as well as a variety of pixel rates are available for attaining high frame rates. When combined, these parameters can answer all types of acquisition rates for low light application requirements.
Nuvu Cameras EMCCD detectors are designed and optimized by a high-quality chip manufacturer for a specified readout rate. By pushing the limits of these detectors to achieve acquisition speeds greater than the manufacturer’s recommendations, cameras necessarily generate more clock-induced charges. However, Nuvu Cameras’ CCCP, the patented technology that drives the EMCCD sensor, is proven to produce the minimal CIC levels, resulting in much more efficient high-speed acquisitions.
Highest quantum efficiency
In order to detect the most photons, EMCCD cameras must optimize the total effective quantum efficiency (QE). In turn, this critical parameter is influenced by the sensor’s quantum efficiency.
EMCCD detectors are typically manufactured either for midband or low fringing applications. To learn more, take a look at our EMCCD tutorial for information on how EMCCD devices optimize QE-related performance for each type of application.
HNU 512 quantum efficiency.
midband detector available for all HNU models.
low fringing detector available for HNU 512 and 1024 models.
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.
λ/10 window quality
The window may alter the consistency of the photon wavelengths transmitted to the detector. Nuvu Cameras 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 HNU 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 HNU camera also offers data transfer through either Gigabit Ethernet or Camera Link for fast and reliable image data transmission.
Besides, the HNU 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.
Design optimized for low light imaging
The patented CCCP controller is fully integrated into the 6.125” × 6.125” × 7” camera housing. The power supply size is also under 5” × 3.5” × 5.5”, all in order to optimize the HNU’s compact size and efficiency.
A built-in shutter enhances detector longevity, allows dark frame acquisitions, and is remotely controllable with our software for all application requirements.
HNU cameras operating temperature is either achieved by air cooling (down to -85°C at a full pixel rate of 20MHz) or liquid cooling (down to -90°C at a full pixel rate of 20MHz), accurate to the nearest 0.01°C, to attain the lowest background noise for the very best performance in low light imaging.