Newcon Optik NVS7-2/4xHD Image Intensifier Tube Specifications, Field of view cleanness

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:

Spatial frequency-contrast characteristic

Frequency, lines/mm	Contrast transfer	Contrast transfer
	Coefficient (Gen. 2+)	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

Image Intensifier Type (Generation)	2+	3
Photocathode operating diameter, mm	18
Photocathode type	S-25	A3B5 (GaAs)
Resolution, lines/mm	30-64	45-64
Photocathode sensitivity, min:
Integral, ∝A/ 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/m2	1⋅10 −3	3⋅10 −3
Signal-to-noise ratio, min	16-20	16-24

Zone

#

Gen. 2+

1

2

3

Gen. 3

1

2

3

Zone

Diameter,

Mm

0 – 9.0

9.0- 14.4 14.4 -18.0

0 – 8.75

8.75– 14.0

14.0– 18

Maximum diameter of defects			Admitted total
Neglected	Admitted		area of defects,
	∅, mm	Q-ty	mm2
0.10	0.15	2	0.15
0.12	0.25	3	0.30
0.15	0.35	3	0.50
0.06	0.15	1	0.072
0.08	0.25	2	0.27
0.10	0.35	3	0.45

Current consumption, max, mA	20	25
Voltage, V	2.8 ± 0.8
Weight, g	55

4. CONSTRUCTION

23

5

Dimensions
Length, mm	22.5
Diameter, mm	43.0

1. On-Off, I/R Switch

4

Tube life until reduced parameters, hrs	10,000	10,000
Keep time, years	12	15
Ambient temperature range, °C	± 40	± 50

2.Mounting Socket

3.Eye-piece adjustments

4.Eyepieces

5.Battery House Cover

6. Objective Lens focus	6	1
		Figure 1