Instructions

HD2402 - 33 - V1.3
if L
B_100
< 100 then t_lim > 10000s
(d index satisfied)
if 11mrad ≤ Alpha < 100mrad ⇒
otherwise t_lim = 10
6
/ L
B_real
(c index satisfied)
if L
B_100
< 100 then t_lim > 10000s
(d index satisfied)
If Alpha < 11mrad ⇒
otherwise t_lim = 10
6
/ L
B_11
The exposure time limit in seconds is displayed aside radiance values.
If the Include in Report box is selected, table data will be included in the final report.
6.4.6 Table g.h.i. 380-1400
Table g.h.i. 380-1400 displays the exposure limit L
R
for parameters “g”, “h”, “i”.
The limit varies with respect to source observation time and to angular dimensions;
consequently, different exposure limits correspond to different observation times and
dimensions. In particular:
L
R
= 2.8
•
10
7
/C
α
[W m
-2
sr
-1
] for t > 10s (g limit)
L
R
= 5
•
10
7
/(t
0.25
C
α
) [W m
-2
sr
-1
] for 10μs ≤ t ≤ 10s (h limit)
L
R
= 8.89
•
10
8
/C
α
[W m
-2
sr
-1
] for t < 10μs (i limit)
C
α
is a coefficient that depends on α dimensions of the source; its value is:
C
α
= 1.7 for α ≤ 1.7mrad
C
α
= α for 1.7 ≤ α ≤ 100mrad
C
α
= 100 for α > 100mrad
The displayed values are:
• E
r
Irradiance value [W/m
2
] (corresponding to the instant value if a single sam-
ple is taken into consideration, and to the mean value if several samples are
taken into consideration).
• Alpha angle in degrees, it is the angle under which the analyzed source is seen.