1-6
• Has protection system, which cuts off the image intensifier
when ambient light level exceeds the limit of 40 lux during a 10
seconds period.
• Is submersible to 10 m for 30 minutes.
• Filled with dry nitrogen to prevent internal fogging.
The PS-27 is an effective night vision system designed for night
operations but does have following limitations:
• The sight requires some night light (moonlight, starlight, etc.)
to operate. Night light is reduced by such factors as passing
cloud cover and objects that produce shadows.
• The sight is less effective viewing through rain, fog, sleet,
snow, smoke.
• Under starlight conditions low contrast environments (such as
snowcovered territory, sandy deserts, large bodies of water or
grassy hills) degrade visibility thereby disguising or masking
changes in terrain.
• Under too low-light conditions the sight looses some of the
resolution that it has under full moon.
Table 1-1. System Data
ITEM
DATA
Magnification
Unity (1 X)
Boresight Characteristics:
Accuracy
Factory aligned to ½ MOA or better
Retention
Permanent to within 1 MOA or better
Repeatability
Within ½ MOA
System Resolution subject to Tube Resolution:
36 to 44 lp/mm
0.38 mrad/lp
45 to 54 lp/mm
0.30 mrad/lp
55 to 64 lp/mm
0.25 mrad/lp
Over 65 lp/mm
0.21 mrad/lp
Содержание PS-27
Страница 7: ...1 1 SECTION I introduction...
Страница 17: ...2 1 SECTION II operating instructions...
Страница 31: ...3 1 SECTION III OPERATIONAL DEFECTS...
Страница 37: ...4 1 SECTION IV maintenance instructions...
Страница 43: ...4 7 Figure 4 1 Focusing Assembly Threaded Ring Driving Ring Locking Ring M3x6 Screw M2 5x4 Screw...
Страница 50: ...A 3 4 3 5 Figure A 2 Accessories 1 From the Kit Figure A 3 Accessories 2 Optional 1 1 2 2 3 4 7 8 5 6...
Страница 54: ...INFO 2...
Страница 55: ...INFO 3...