Armasight NSCCOMR00133DB1 CO-MR GEN 3 Bravo Day/night vision Clip-On system - Manual (Page 11)

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DESCRIPTION AND DATA
2.1 SYSTEM DESCRIPTION
The CO-MR consists of two primary parts: the night vision device (hereafter referred to as NVD) and the
quick release mount, or mount. The CO-MR is delivered already assembled, as shown in Figure 2-1: the
mount (B) should be secured to the seating rail of the NVD (A) with two screws.
The optical-electronic system of the NVD includes four main components: the objective and output
lenses, an image intensifier tube, and the body.
The objective lens focuses available light (photons) on the photocathode of the image intensifier tube
(IIT). The light energy causes electrons to be released from the cathode. After being amplified, the elec-
tron flow represents an intensified version of the original image of the scene. The electrons then strike
the IIT phosphor screen, which reacts to them by glow that is visible to the human eye. The image is
projected by the output lens from the IIT screen to infinity, and the resulting image is magnified when
viewed through the day scope. As such, when the CO-MR mounted in front of the day scope, it converts
the latter into a night vision sight.
The automatic brightness adjustment system maintains consistent image brightness, even in changing
light conditions.
The CO-MR MG version incorporates manual gain control, which allows the operator to increase or
decrease the brightness of the image to compensate for overly bright or extremely dark conditions.
The bright light protection system controls the existing ambient light through a photoreceiver, and
cuts off the IIT automatically when the illumination level exceeds the limit of 100…150 lx within 10
seconds. The CO-MR turns back on when removed from the excessive light.
The automatic shut-off function preserves battery life should the CO-MR be inadvertently activated.
The CO-MR is powered by a single AA or CR123A battery.
FIGURE 2-1. CO-MR NIGHT VISION CLIP-ON SYSTEM AS DELIVERED
B
A