Cameras

The Lambert Cooled Image Intensifier (LICI) is a special camera attachment in which the complete Image Intensifier is cooled to reduce the noise of the photocathode. The noise reduction factor is at least 100, which means, that in combination with a low noise S20 photocathode, dark count rates below 0.5 cnts/sec/cm2 can be achieved. This makes it possible to acquire extremely faint phenomena which otherwise would have been masked by the noise of the image intensifier. The cooled image intensifier is a so-called hybrid tube. A hybrid tube is a two-stage image intensifier, which consists of a second-generation tube as the first stage and a de-magnifying first generation tube as a second stage. Using the image intensifier as a de-magnifier instead of a lens offers a much more efficient coupling to the camera. With the fast shutter option, called gating, time-resolved measurements are made possible.