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Image Intensifier EBI Affect of temperature on Dark Current in Night Vision Tubes

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Published on May 1, 2010

The reduction of thermionic emission using non-contact radiant cooling of the photocathode. The temperature at the photocathode starts out at 40 degrees Celsius and terminates at 10 degrees Celsius. Thermal electron emissions are a primary source of noise in an image intensifier. There was no source of photo electrons, what your witnessing is the emission of thermal electrons mainly from the photocathode . This was made possible through the cascading of two gen III tubes.

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Documenting EBI noise in Night Vision Image Intensifier Tube

Cold Cathode Video

Cold Cathode Dark Current

Photocathode Dark Current

Photocathode Electron

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