The IIT is sensitive to light if you expose this device to daylight such as sunlight, but also cloudy skies or direct light such as car headlights. So you will damage the night vision system. More especially, using an IIT when bright light hits the photocathode might seriously damage the photocathode itself. The key to avoid any damage it’s to systematically cover the night vision device (NVD) with their protective caps even if the NVD is off, raised on the helmet.

Reducing the load on a soldier is a constant challenge. We can notice a real evolution concerning the size and weight of our image intensifier tubes (IIT). We talk about SWaP: Size Weight and Power.

Reduction of SWaP contributes to enhance the efficiency and effectiveness of armed forces. Night vision devices that are designed around the 16mm IIT offer the tremendous advantage of having the same level of performance as those based upon the 18 mm tube, but with significantly reduced weight.
 

Photonis offers the highest quality of image intensifier tubes for a wide range of night vision devices which support specific requirements, environments, applications and missions: binocular goggle, monocular goggle, panoramic goggle, clip-on weapon sights, etc.

Photonis image intensifier tubes are made in Europe (Brive-La-Gaillarde, in France and Roden, in the Netherlands). That’s why they are ITAR free: The International Traffic in Arms Regulations (ITAR) is a set of U.S. federal government regulations used to control the import and export of objects and services related to national defense. 
 

In night vision, we have defined 5 different light levels from 1 (full moon) to level 5 (overcast starlight) The better the image intensifier tube, the better the image quality in low light conditions.

Night vision is the ability to operate safely in night or in any environment under low light conditions. Whereas, infrared imaging products, such as thermal (LWIR) or Shortwave Infrared (SWIR) sensors, are optimized for day-through-night lighting conditions and support surveillance & security applications, industry & research projects, and mobile use.  

First of all, photons (light) are converted into electrons by the photocathode. Then, they are accelerated through an electrical field and hit the microchannel plate walls to generate secondary electrons that in turn will generate more electrons into what is called an « electron avalanche ». Then, multiplied secondary electrons are accelerated through an electrical field, hit the phosphor screen layer and are converted back into light. Finally, the image is projected through the eye-piece of the night vision device.
 

An IIT is a module that intensifies, or amplifies, low light level images into levels that can be seen by the human eye. The IIT collects the existing ambient light from natural sources, such as starlight or moonlight, or from artificial sources such as street lights or infrared illuminators. The light passes through several internal components to be multiplied several thousand times, producing a much brighter image that can be seen by the soldier through the night vision device.
 

Night vision enables to operate safely in night and low light conditions. Owning the best night vision equipment alone will not provide the best images. That's why it is important to opt for a high-quality image intensifier tube (IIT) to have the best possible performance.

Over the years, night vision has become a key opto-electric technology in modern warfare as more and more operations take place by night. Photonis offers a wide range of intensifier tubes, enabling users to find the one that will work for their specific mission or operational requirement.