Specification
Model
OHB-31
Magnification
1X
Field of view
50°
Lens system
20.5mm F/1.0
Focuse range
0.25m to infinitely
Eye relief distance
25mm
Diopter
+4，-6
Auto to control brightness
Yes
IR light
built-in
Low battery and infrared indicator
built-in
Dimension
154x128x89mm
Weight
510g
Power supply
1 * CR123
Working hour (IR off)
40h
Image Intensifier Tube
IIT Generation
Gen3
Gen2+
Photocathode type
18mm GsAs
18mm S-25
Photocathode sentivie uA/lm
≥1800
600-900
Resolution lp/mm
60-72/65-74
48-58/57-64/60-72
Luminous gain fl/fcd
45000-65000
19000-30000
Signal-to-noise
20~25
18~23
FOM
≥1800
1150-1600
Lifespan (h)
12000
10000
Warranty (Year)
1
Effective Distance (m) (human)
Detection Distance (Environment illumition condition)
10-3 lux
300
220
10-4 lux
250
140
Recognition Distance (Environment illumination condition)
10-3 lux
225
175
10-4 lux
150
100
Environment Data
Operating temperature °C
-40° to +50°
Storage temperature °C
-50° to +75°
Waterproof
IP67 (optional)
Humidity %
98%
Features
Small in size & compact rugged goggle system
Hand-held, head-mounted or helmet mounted
Multi-coated all-glass optics, superior resolution
Wide angle infrared illuminator
Waterproof and fog resistant
