Newcon Optik NVS7-2/4x - Manual (Page 6)

IMAGE INTENSIFIER TUBE SPECIFICATIONS
The unit is utilizing a small size image intensifier with direct image transfer.
The tube contains a microchannel plate, multi-alkaline metal cathode, yellow-green color
screen, built in electronics high voltage DC to DC converter and flat surface glass
input-output windows.
Main parameters:
Image Intensifier Type (Generation) 2+ 3
Photocathode operating diameter, mm 18
Photocathode type S-25 A
3
B
5
(GaAs)
Resolution, lines/mm 30-64 45-64
Photocathode sensitivity, min:
Integral, µA/ lm 400-650 1300-2200
Spectral at λ = 850 nm, mA/W 15 90
Light amplification 20-26000 25-30000
Image magnification 1
Dark background brightness, max, cd/m 2 1⋅10 −3 3⋅10 −3
Signal-to-noise ratio, min 16-20 16-24
Current consumption, max, mA 20 25
Voltage, V 2.8 ± 0.8
Weight, g 55
Dimensions
Length, mm 22.5
Diameter, mm 43.0
Tube life until reduced parameters, hrs 10,000 10,000
Keep time, years 12 15
Ambient temperature range, °C ± 40 ± 50
Spatial frequency-contrast characteristic
Frequency, lines/mm Contrast transfer
Coefficient (Gen. 2+)
Contrast transfer
Coefficient (Gen. 3)
2.5 0.83 0.86
7.5 0.56 0.58
15.0 0.26 0.28
Field of view cleanness
Zone Zone Maximum diameter of defects Admitted total
# Diameter, Neglected Admitted area of defects,
Gen. 2+ Mm ∅, mm Q-ty mm 2
1 0 – 9.0 0.10 0.15 2 0.15
2 9.0 - 14.4 0.12 0.25 3 0.30
3 14.4 -18.0 0.15 0.35 3 0.50
Gen. 3
1 0 – 8.75 0.06 0.15 1 0.072
2 8.75 – 14.0 0.08 0.25 2 0.27
3 14.0 – 18 0.10 0.35 3 0.45
4. CONSTRUCTION
1. On-Off, I/R Switch
2. Mounting Socket
3. Eye-piece adjustments
4. Eyepieces
5. Battery House Cover
6. Objective Lens focus
5
2
6
1
3
4
Figure 1