Litton EOS of the US advises of key advancements that differentiate Gen IV from Gen III

Litton EOS of the US advises of key advancements that differentiate Gen IV from Gen III include the removal of an ion-barrier film from the image intensifier tube's microchannel plate and the addition of a gated power supply. (Gen IV sometimes is referred to as "filmless" technology).

These changes have resulted in significantly higher signal-to-noise ratio, superior high light resolution and dramatically reduced halo. With these improvements, the user will see greater detail across a wider range of night light conditions.