Teledyne Camera Accessories T100 ユーザーズマニュアル
Principles of Operation
Teledyne API - T100 UV Fluorescence SO2 Analyzer
286
13.1.7.2. PMT OPTICAL FILTER
The PMT used in the T100 reacts to a wide spectrum of light which includes much of
the visible spectrum and most of the UV spectrum. Even though the 214 nm light used
to excite the SO
the visible spectrum and most of the UV spectrum. Even though the 214 nm light used
to excite the SO
2
is focused away from the PMT, some of it scatters in the direction of
the PMT as it interacts with the sample gas. A second optical band pass filter placed
between the sample chamber (refer to Figure 13-2) and the PMT strips away light
outside of the fluorescence spectrum of decaying SO
between the sample chamber (refer to Figure 13-2) and the PMT strips away light
outside of the fluorescence spectrum of decaying SO
2
* (refer to Figure 13-5) including
reflected UV form the source lamp and other stray light.
LAM
P
OUT
P
UT
(A
rbit
rary Un
tis)
10
5
10
4
10
2
10
3
10
1
1
100
200
300
400 500
WAVELENGTH (nm)
0
21
3.9
330
.3
SO
2
* FLUORESCENT
SPECTRUM
PMT OPTICAL FILTER
BANDWIDTH
Figure 13-5: PMT Optical Filter Bandwidth
06807C DCN6650