Newcon Optik NV66-G2-4x Main tube parameters, Spatial frequency-contrast characteristic

Main tube parameters

Image Intensifier Type		EPM66G2
(Generation/Grade)
Photocathode operating diameter		18 mm
Photocathode type		S-25
Photocathode sensitivity:
Integral		450 μA/ lm
Spectral at λ = 850 nm		26 mA/W
Light amplification		>20,000 fl/fc
Image magnification		1x
Signal-to-noise ratio, min	18
Current consumption, max		18 mA
Voltage		2.8±0.8 V
MTBF, hours	10 000
Operating temperature range		-50°C … +50°C
Spatial frequency-contrast characteristic
Frequency, lines/mm		Contrast transfer
		coefficient
2.5		0.83
7.5		0.56
15.0		0.30
	6