The new ultra-light night vision filters which weigh less than a gram almost resemble those seen in the movies. These glasses allow users to catch a glimpse of the visible and infrared spectrum. They also help in allowing the user to drive safely in the dark.
As of now, traditional night vision technology is in use. It required infrared photons to pass through a lens. Then it would meet a photocathode that would help in transforming these photons into electrons.
These electrons travel through a phosphor screen and are reconverted back to photons. These produce an intensely visible image which the human eye can see. In order to prevent thermal noise from being intensified these elements need cryogenic cooling.
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