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NIGHT VIEWING GOGGLES
DARKOS ONV-2+/1x-200
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DARKOS ONV-2+/4x-400
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Specifications
| Model |
ONV-2+/1x-200 |
ONV-2+/4x-400 |
| Magnification with lens f'=25 mm, x |
1 |
4 |
| Recognition range of growth figure, m |
200 |
400 |
| Angular field of view, deg |
40 |
12 |
| Focusing range, m |
0.25…infinity |
5…infinity |
| Weight, gram |
500 |
600 |
| Diopter range |
+/-5 |
+/-5 |
| Voltage, V |
2-3 |
2-3 |
| Operating time without IR-illuminator, hours |
20 |
20 |
| Operating time with IR-illuminator, hours |
10 |
10 |
| Mask weight, gram |
250 |
250 |
 Night
viewing goggles "Darkos ONV-2+/1x-200" are
developed for viewing and recognition of the objects,
driving vehicles in dark time, operation in dark rooms,
etc. It is designed on the base of the II+ Gen. IIT and
it is completed with an IR-illuminator.
It is supplied with the mask which is to be fixed on the
head. The mask allows to adjust the night viewing goggles
relative to eyes. It also allows fast turning up and
fixation of the device in the vertical position.
Sealed device housing permits to use it in heavy
environment conditions (rain, snow, smog, etc.)
The device is built on the base of EPM 44G Image
Intensifier Tube which is a small size image intensifier
with direct image transfer. It has microchannel plate,
multi-alkaline metal cathode, yellow-green colour screen,
built in electronics high voltage DC to AC converter and
flat surface glass input-output windows.
Main specifications:
- Photocathode operating diameter, mm - 18
- Photocathode type - S-25
- Resolution, min, lines/mm - 30
- Photocathode sensitivity, min:
- with filter KS-17, mA/lm - 120 -
integral - 200 - spectral at lambda = 850 nm,
mA/W - 12
- Conversion coefficient - 20000
- Image magnification - 1
- Dark background brightness, max, cd/m2 - 1,2x10-3
- Signal-to-noise ratio, min - 40
- Current consumption, max, mA - 20
- Voltage, V - 2,8 +/- 0,8
- Weight, gram - 55
- Mean time before failure, hours - 1000
- Keep time, years - 12
Special frequency-contrast charracteristics:
| Frequency, lines/mm |
Contrast transfer coefficient |
| 2.5 |
0.83 |
| 7.5 |
0.56 |
| 15 |
0.26 |
Field of view cleanness:
| Zone number |
Circular zone dimensions, mm |
Maximum diameter
of defects |
Admitted total area of defects,
mm2 |
| Neglected |
Admitted |
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Diameter, mm |
Quantity |
| 1 |
0 - 9.0 |
0.1 |
0.15 |
2 |
0.15 |
| 2 |
9.0 -14.4 |
0.12 |
0.25 |
3 |
0.3 |
| 3 |
14.4 - 18.0 |
0.15 |
0.35 |
3 |
0.5 |
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Reg. Office UK : 13 Queens Gardens, Hunstanton, Norfolk, PE36 6HD. Tel.: 01760 441087 Mobile: 07879 214651
