Technical data

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2
DESCRIPTION AND DATA
2.1 SYSTEM DESCRIPTION
The CO-MINI consists of two primary parts: the night vision device (hereafter referred to as “NVD”), and
the quick-release mount, or mount. The CO-MINI is delivered as shown in Figure 2-1: the mount (A) and
topWeaverrail(B)shouldbesecuredontheNVDseatingrailswithM4×8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
electron 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 im-
age 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-MINI is mounted in front of the day scope,
it converts the device into a night vision sight.
The automatic brightness adjustment system maintains consistent image brightness, even in changing
light conditions. The manual gain control allows the operator to rene the image contrast by compen-
sating for overly bright or extremely dark conditions.
Additionally, the CO-MINI MG version incorporates gain control, which allows the user 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sec-
onds. The CO-MINI turns back on when removed from the excessively lit environment.
FIGURE 21. COMINI NIGHT VISION CLIPON DEVICE AS DELIVERED
B
A