ARMASIGHT by FLIR
BNVD
ARMASIGHT by FLIR
BNVD
U S E R M A N U A L
8
SECTION 3. OPERATING THE SYSTEM
3.2.2 DIOPTER ADJUSTMENT RING
The diopter adjustment ring allows a user to alter the viewfinder to
accommodate that individual’s eyesight for optimum image sharpness.
While looking through the eyepiece, rotate the diopter adjustment ring
to optimize the sharpness of the image in the viewfinder.
3.2.3 FOCUS RING
Bring the object into focus by turning the objective focus ring (counter
clockwise for far focus, clockwise for near focus, if you look in the
eyepieces). Rotate the focus ring until the subject looks sharp in the
viewfinder.
3.2.4 INTERPUPILLARY DISTANCE KNOB
ADJUSTMENT
Adjusts the distance between each eyepiece by rotating the knobs
together or apart, allowing for each eye to observe the entire field at
the same time.
3.2.5 GAIN CONTROL KNOB
Used to adjust the gain (brightness) of the viewed image. Turn the gain
control to balance the illumination input to the eyes.
3.2.6 INDICATION
When the BNVD is ON, the color LED indicators can be shown in the
field of view. The color LEDs indicate the following states of the device:
INDICATIONS
COLOR OF LED
IN THE FOV
Built-in IR illuminator is activated
Red
Image intensifier tubes are exposed to
excessive levels of light
Green
Battery is low
Flashing Red
3.3 AUTO POWER OFF FUNCTION
The BNVD bright light cut-off feature shuts off power to the binoculars
when they are exposed to excessive levels of light for more than 10
seconds.
Automatic shut-off system automatically turns off the device when it is
unused (controls are not touched) for 60 minutes. The automatic shut-
off function preserves battery life should the device be inadvertently
activated.
3.1 SYSTEM DESCRIPTION
The BNVD utilizes the principle of intensification of the residual light
that is reflected from the surrounding objects. The optical system of the
unit consists of two monocular channels, each consisting of a lens, an
image intensifier tube (IIT), and an eyepiece.
This device operates with a single gain control knob for both channels.
Each unit allows for vertical adjustment (using the head or helmet
mount), fore-and-aft adjustment, objective lens focus, eyepiece focus,
and interpupillary distance adjustment. The binoculars are equipped
with an infrared (IR) light-emitting diode (or illuminator) to provide
additional illumination for reading a map. The binoculars are also
equipped a low battery indicator, a bright light cut-off system indicator,
and IR illuminator indicator in the field of view of device.
Battery Cap
Focus Ring
Focus
Ring
Interpupillary Distance
Adjustment Knob
Interpupillary
Distance
Adjustment
Knob
Built-In IR
Illuminator
Gain Control
Knob
Photoreceiver
of Bright Light
Cutoff System
Turn-Pull
Operating Switch
Eyepiece
Diopter
Adjustment Ring
Mounting
Bracket
3.2 SYSTEM CONTROLS
3.2.1 TURN-PULL OPERATING SWITCH
The turn-pull operating switch performs the following functions:
• Activates the BNVD when turned to ON.
• To activate built-in IR illuminator, pull switch out and turn to IR
position. The IR illuminator will activate on, and red LED indicators
in both eyepieces will glow. Rotate the switch to ON position to
deactivate the IR.
• Deactivates the BNVD when turned to OFF position.
