L2482-01 Ver la hoja de datos (PDF) - Hamamatsu Photonics
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L2482-01 Datasheet PDF : 14 Pages
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SUPER-QUIET MERCURY-XENON LAMPS
4) Lamp Current and Lamp Voltage
Figure 9 shows the current-voltage characteristic. The lamp
voltage slightly increases in accordance with the lamp cur-
rent.
Figure 9: Current-Voltage Characteristic
(200 W Lamp L2423)
TLSXB0086EA
(Typ. at 25 °C)
27
26
25
24
23
22
SPECIFIED RANGE
6.5 7.0 7.5 8.0 8.5 9.0 9.5
LAMP CURRENT (A dc)
5) Staibility of Radiant Intensity
5)-1 Radiant Intensity and Lamp Current
The output radiant intensity changes in proportion to the
lamp current. Figure 10 shows their relation. Furthermore,
compared to a super-high-pressure mercury lamp, the lamp
reaches its maximum radiant intensity within a very short
time. This is because the discharge through the enclosed
xenon gas causes the mercury to be efficiently vaporized.
This is shown in Figure 11.
Figure 10: Radiant Intensity vs. Lamp Current
(200 W Lamp L2423)
TLSXB0088EA
140
(Typ. at 25 °C)
120
100
80
60
SPECIFIED RANGE
0
6.5 7.0 7.5 8.0 8.5 9.0 9.5
LAMP CURRENT (A dc)
Figure 11: Radiant Intensity vs. Initial Operating Time
(200 W Lamp L2423)
TLSXB0090EA
(Typ. at 25 °C)
MERCURY-XENON
LAMP
100 (200 W)
SUPER
HIGH PRESSURE MERCURY
LAMP (200 W)
50
00
5
10
15
20
OPERATING TIME (min)
LIFE
1) Radiant Intensity and Operating Time
The light output intensity decreases with operating time. This
is due to a loss of glass transmittance caused by blacken-
ing the bulb wall. This is due to evaporation of the cathode
material, and partly by solarization effects from ultraviolet
radiation on the bulb glass crystals. Figure 12 shows the
change of radiant intensity as a function of the operating
time.
Figure 12: Radiant Intensity vs. Operating Time
(200 W Lamp L2423)
TLSXB0087EA
(Typ. at 25 °C)
100
90
80
70
60
0
0 100 200 300 400 500 600 700 800 900 1000
OPERATING TIME (h)
2) Lamp Voltage and Operating Time
The electrode distance in conventional lamps is gradually
increased due to sputtering phenomenon, resulting in in-
creased lamp voltage. Contrary to it, the SQ Mercury-Xe-
non Lamp exhibits negligible electrode spattering and there-
fore, the lamp voltage is almost constant over a long period
of operation. Figure 13 shows the change of the lamp volt-
age vs. operating time.
Figure 13: Lamp Voltage vs. Operating Time
(200 W Lamp L2423)
TLSXB0089EA
30
(Typ. at 25 °C)
25
20
15
0
500
1000
1500
2000
OPERATING TIME (h)
3) Fluctuation and Operating Time
As has been stated, the radiant intensity decreases with
operating time. No conspicuous change in fluctuation, how-
ever, occurs with the elapsing of operating time. Figure 15
a) - d) show the change in fluctuation according to the
elapsed operating time and Figure 14 shows the block dia-
gram for fluctuation measurement.
4
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