PART 1 1
173
OPTICAL
AND OPTRONIC MEANS
-
!
GROUP 58 COMMUNICATIONS, DETECTION
AND COHERENT RADAR EQUIPMENT
Class 5855 Night Vision Equipment, Active and Passive
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PNK-4S AGAT (PNK-4SR AGAT-R) SYSTEM
Intended for installation at the commander’s work sta-
tion in the rotary hatch of the tank. It is a combination
day/night sighting and surveillance commander’s sys-
tem stabilized in elevation.
The modernized PNK-4SR system
features an image converter tube
(ICT) of 2-super generation and a
universal (passive) mode of
operation.
The system comprises a TKN-4S
(TKN-4SR) sight, a power supply
unit, a position sensor, a protec-
tive glass and a single SPTA set.
The use of the image converter
tube of 2-super generation
extends the range of observation
and target identification, provides
even distribution of image sharp-
ness over the entire field of view,
increases immunity to external
flashes of light, ensures the uni-
versal passive mode of operation,
i.e., without illuminating targets by
the searchlight, and decreases
the sight weight.
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Basic Characteristics
PNK-4S PNK-4SR
Magnifying power:
day channel 1 and 7.6 1 and 7.6
night channel 5.1 6.8
Field of view, deg:
day channel 7.2(El), 27.7 (Tr) 7.2 (El), 27.7 (Tr)
night channel 7.7 7.7
Resolution, arcsec:
day channel 8 8
night channel 72 70
ICT generation 1 2 super
Immunity to flashes of light no yes
Tank visibility range
at ambient skylight intensity:
more than 0.003 lx 700 m 1,100 m
in passive mode in universal
passive mode
less than 0.003 lx 800 m in active mode
Eyepiece diopter adjustment,
diopter ±4 ±4
Stabilized sight line
elevation limits, deg from -10 to +20 from -10 to +20
Minimum and maximum
aiming rates
of sight line, deg/s 0.05/3 0.05/3
Accuracy of sight line
stabilization, min 1 1
Weight, kg:
sight 43 39
power supply unit 4.2 4.2
position sensor 10.8 10.8
Power supply 27 VDC and three-phase 400 Hz 36 VAC