How was the night vision device invented?

For use in combat at night or low light conditions. The first ones were too big for individuals and were used only on fighter aircraft, tanks, etc.

Night vision glasses were invented during World War II.

The first practical commercial night vision device offered on the market was developed in 1932 by Dr. Vladimir K. Zworykin working for the Radio Corporation of America and was intended for civilian...

The original night-vision unit (Generation 0) was created by the U.S. Army for use in W.W. II and the Korean war. Generation 3 devices are currently used by the military. (One of the pioneers in this...

Simply by intensifying the available light - from stars, ambient light, etc.