Technical data

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 intensier tube, and the body.

The objective lens focuses available light (photons) on the photocathode of the image intensier tube

(IIT). The light energy causes electrons to be released from the cathode. After being amplied, the elec-

tron ow represents an intensied 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 innity, and the resulting image is magnied 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o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.

FIGURE 21. COMR NIGHT VISION CLIPON SYSTEM AS DELIVERED