Night Optics Adventurer Gen 1+ Night Vision Goggle - Manual (Page 8)

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NIGHT OPTICS USA NIGHT VISION GOGGLES
NIGHT VISION CHARACTERISTICS
EXTREME DARKNESS
Night Vision Devices are effective under most dark conditions including overcast starlight.
They are not practical in an extremely dark environment such as in a tunnel where there is
no natural ambient light. Without sufficient ambient light, the operator may notice pinpoint
size sparkles (scintillation or noise) in the image area. These sparkles are small amounts of
energy generated inside the image intensifier that strike the phosphor screen and are an
indication that the device is working.
CONTRAST REVERSAL
Night Vision Devices detect light that cannot be seen by the human eye. This light is often
referred to as being in the near-infrared light spectrum. The existence of this light and the
manner in which it reflects is not normally visible to the naked eye. For this reason,
objects that normally appear lighter than their surroundings may appear dark against a
light background. In addition, the output image of the Night Vision Device is dependent on
the reflective quality of the objects the operator sees in the viewing area. Objects that
appear light during the day but have a dull surface may appear duller when viewed
through a Night Vision Device. All of these factors must be taken into account when
utilizing a Night Vision Device for observation or navigation purposes.
DEPTH PERCEPTION
Night Vision does not present normal depth perception. Use extreme caution when using
a Night Vision Device where reliance upon depth perception is important.
FOG AND RAIN
Night Vision Devices are very responsive to reflected ambient light; therefore, fog or heavy
rain can reflect too much light toward the Night Vision Device and may seriously degrade
its performance.
HONEYCOMB
This is a faint hexagonal pattern throughout the image area. This effect is more noticeable
under high light conditions. Do not be concerned - the honeycomb effect is an inherent
characteristic of all high-amplification night vision systems that incorporate a microchannel
plate in the intensifier.