Specifications

22
Structurix Intensifying Screens
Relative exposure factor
When making exposures with uorescent
screens, it is important to understand the
potential impact of variables such as
temperature, exposure energy and
exposure time:
• Intensifying screens uoresce more
brilliantly at low temperature. Therefore,
the screen efciency will drop with
increasing temperature
• With increasing energy, the absorption
of uorescent screens is reduced and,
as a result, the intensifying effect is
diminished
• Due to the “reciprocity effect” with
uorescent screen systems, the gain in
exposure time compared to lead screen
systems, diminishes with increasing
exposure length
80
60
40
20
10
8
6
4
2
100 100
200
400
300 350 400 450 500 550
80
60
40
20
10
8
6
4
2
Relative emission spectrum
of intensifying screens
Spectral sensitivity of
Agfa Structurix F6
(for density 1.0 above fog)
S = ( )
uJ
cm
80
60
40
20
10
8
6
4
2
100 100
200
400
300 350 400 450 500 550
80
60
40
20
10
8
6
4
2
Relative emission spectrum
of intensifying screens
Spectral sensitivity of
Agfa Structurix F6
(for density 1.0 above fog)
S = ( )
uJ
cm
Spectogram
80
60
40
20
10
8
6
4
2
100 100
200
400
300 350 400 450 500 550
80
60
40
20
10
8
6
4
2
Relative emission spectrum
of intensifying screens
Spectral sensitivity of
Agfa Structurix F6
(for density 1.0 above fog)
S = ( )
uJ
cm
Relative Exposure
F8 F6 D7
100 kV NDT 1200 0.010 0.049
RCF 0.030 0.174
No screen 1.000
300 kV NDT 1200 + Pb 0.008 0.042
RCF 0.022 0.132
Pb 1.000
Ir 192 NDT 1200 + Pb 0.007 063
RCF 0.035 0.389
Pb 1.000
Co 60 NDT 1200 + Pb 0.006 0.096
RCF 0.040 0.562
Pb 1.000
Technical Specications