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   EPM-44G 2+ generation 18mm tube with glass input and output
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These tubes applied in popular night vision goggles PN-14K of Novosibirsk instrument making plant.
 

Main parameters:

Technical data

44G-A

44G-B

44G-S

Useful diameter, mm

18

Photocathode type

S-25

Resolution, lp/mm

57

51

64

Signal to noise (at 108µlx)

22

20

24

Luminous sensitivity at 2850oK, μA/lm

550

550

600

Radiant sensitivity at λ=850 nm, mA/W

45

35

50

Gain at 2×10-5 cd/m2/lx, min

35000/π

35000/π

35000/π

Equivalent Background Input (EBI), µlx, max

1,5×10-3

Input current, mA

16

Input voltage, V

2,0÷3,6

Weight, g

55

MTTF (Mean time to failure), hours

5000

MTF (Modulation Transfer Function), %, min

Frequency, lp/mm

Contrast transfer coefficient

44G-A

44G-B

44G-S

2.5

88

87

90

7.5

72

67

78

15,0

50

42

55

Field of view cleanness:

Zone
number

Circular
zone
dimensions, mm

Maximum diameter of spots

Admitted total
area of spots, mm2

neglected

admitted

diameter, mm

quantity

I

9.0

0.06

0.12

1

0.10

II

9.0-14.4

0.08

0.18

1

0.20

III

14.4-18.0

0.10

0.20

2

0.35

Main modifications of the image intensifiers: glass output, invertor, non-invertor.

 
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