Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1993-06-25
1994-09-13
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
200 17R, H01J 3150, H01J 4014
Patent
active
053471199
ABSTRACT:
A night vision device with an infrared light usable for covert signaling and reading as well as for illumination of exceedingly dark areas where sufficient ambient light does not exist for the night vision device to provide a view of the area, includes a singular dual-action control switch which allows an operator of the night vision device to operate all of the functions of the device with a singular control. These functions include momentary illumination of the infrared light for signaling and for "quick look" purposes, such as for updating a user's knowledge of map coordinates, for example. The control circuit also allows the infrared light to be maintained on for area illumination, for example, until the user purposely turns it off. However, the momentary illumination feature for the infrared light improves utility of the night vision device for signaling, and improves user safety when "quick look" map reading and area illumination functions are performed because the user is less likely to forgetfully leave the infrared light on, and to thereby reveal the user's position to other personnel equipped with night vision devices. Human factors considerations for operation of the night vision device with minimal training and in stressful situations is improved.
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Allen Stephone B.
Litton Systems Inc.
Nelms David C.
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