Night vision device and method

Details Night vision device and method Night vision device and method

1997-11-14

2000-07-11

Westin, Edward P.

Radiant energy

Infrared-to-visible imaging

250214VT, H01J 4014

Patent

active

060876603

ABSTRACT:
A night vision device (NVD) includes a control circuit having an acceleration-responsive switch. When the NVD is in a generally horizontal use position, the acceleration-responsive switch enables a circuit allowing voltage to be applied to an image intensifier tube of the night vision device, so that night vision is provided. On the other hand, when the device is flipped up to a stowed position allowing the user of the device unobstructed natural vision, the acceleration-responsive switch senses the changed orientation of the gravitational acceleration vector, and turns off the image intensifier tube as well as other light-emitting sources of the night vision device. The acceleration responsive switch controls operation of voltage step-up circuit, which allows the NVD to be operated with a single one and on-half volt battery cell, and which also insures when it is turned off that not only is the image intensifier tube turned off, but also that all other possible sources of light emissions from the NVD are turned off.

REFERENCES:
patent: 4449787 (1984-05-01), Burbo
patent: 4672194 (1987-06-01), Kastendreck
patent: 5130527 (1992-07-01), Gramer et al.
patent: 5408086 (1995-04-01), Morris et al.
patent: 5506730 (1996-04-01), Morley et al.

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