than conventional lamps.
LIGHT INTENSITY (A.U.)
3
L2D2LAM
PL
1.3 TIMES 2-2000 SERIES
HIGHER
2
1
CONVEN
TIONAL
TYPE
0
190 210
230 250
270
WAVELEN
GTH(nm)
290 31
0 330 350
370 390
TLSOB0052EA
ABLE
SMALL INTENSITY VARIATIONS : 1/2
RELATIVE INTENSITY(A.U.)
Compared to our conventional lamps
wly devel-
ructure, a
mum tem-
ion, which
important
operation,
ed. This
ations of
n the light
as a re-
±0.3
%/h.
TLSOF0138
APPLICATIONS
UV-VIS Spectrophotometers
CE(Capillary Electrophoresis)
SOx/NOx Analyzers
Film Thickness Measurement
HPLC
Atomic Absorption Spectrophotometers
Thin Layer Chromatography
The spacing between elec-
trodes is kept fixed by a
molded ceramic spacer.
This reduces the lamp to
lamp variations in the light
output to one half of that
obtained with our lamps
having a conventional all
metal structure.
I
Intensity Variation
4
3.5
3
2.5
2
1.5
1
0.5
0
190
TLSOB0053EA
L2D2 LAMPS
CONVENTIONAL
LAMPS
210
230
250
270
290
310
330
350
370
390
WAVELENGTH (nm)
ermal
ven in
ons.
LESS MOVEMENT
OF ARC
EMISSION POINT
Since the ceramic structure has a small thermal
expansion coefficient, there is virtually no move-
ment of the arc emission point during operation.
2
00
12 V to 15 V/0 V
2.5 V/1.0 V
2.5 V/1.7 V
LENS
LAMP
SEE-THROUGH
L2D2 LAMP
TLSOC0011EF
Required Dis-
charge Starting
Voltage
Min.
(V dc)
350
350
400
350
350
400
350
400
350
400
350
400
400
350
400
350
400
400
350
350
350
350
(mA dc)
300±30
0.05
80
±0.3
(V dc, ac)
2.5±0.25
3.0±0.3
Max.
(%/ h)
2.5±0.25
4
80
3.0±0.3
10±1
300±30
±0.3
0.05
10±1
1.2
5
0.8
85
12 to 15
80
—
—
2.5±0.25
10±1
0.5 to 0.55
4
0.8
Anode
Current
Tube
Drop
Voltage
Typ.
(V dc)
Output Stability
Drift
Fluctuation
(p-p)
Max.
(%)
Filament Ratings
Warm-up
Current
Voltage
C
Time
Typ.
Min.
(A dc, ac)
(s)
4
20
5
Operating
Current
Voltage
Typ.
(A dc)
1.8
0 to1.8
(V dc)
1.0±0.1
0 to 1
1.0±0.1
1.7±0.2
0 to 1
Guaranteed
Life
D
Conventional
Lamps
E
Type.
No.
(h)
4000
1.8
3.3
0 to1.8
F
2.5 to 6.0
0.3 to 0.6
20
7.0±0.5
2000
1
G
G
0
1.0±0.1
2.5 to 6.0
F
0
1.8
0.3 to 0.6
2000
H
L613,L613-04
L3382-01
—
L613,L613-04
L1636
—
L1729
L3381-01
L3382-01
—
L591
L2196
—
L1626
L2541
L2526
L4505
L4505-50
L4510
L4510-50
L879-01
L879
L6565
L6566
L6301
L6302
L7298
L6303
L6304
L6305
L6306
L6307
L6308
L7296
L7296-50
L7295
L6309
L6310
L6311
L6311-50
L6312
L6312-50
L7293
L7292
Required Dis-
charge Starting
Voltage
Min.
(V dc)
400
400
350
350
350
(mA dc)
300±30
80
Anode
Current
Tube
Drop
Voltage
Typ.
(V dc)
Max.
(%/ h)
Output Stability
Fluctuation
Drift
(p-p)
Max.
(%)
±0.3
Voltage
(V dc, ac)
Filament Ratings
Warm-up
Operating
Current
Time
Current
Voltage
Max.
Min.
Max.
(A dc, ac)
(s)
(V dc)
(A dc)
1.0±0.1
0.05
2.5±0.25
4
20
1.7±0.2
Guaranteed
Life
D
Conventional
Lamps
E
Type.
No.
(h)
1.8
2000
3.3
—
—
L1887
—
L1886
L6999
L6999-50
L7307
L7174
L7306
standard lamps with an aperture of 1.0 mm diameter. (Refer to page 8.)
s recommended. The maximum rated voltage that can be applied is 650 V.
able between the lamp and the power supply is long because
p terminal.
xceeds 0.05 %.
refer to page 5 and 6. Please consult with our sales offices
NOTE
FRecommended
operating voltage is 3.5 V
±
0.5 V.
GIn
these lamps, discharge current is allowed to flow into the filament during operation so that cathode temperature is maintained at an optimum level. So there is no need for input of external
power to keep the filament heated.
HAverage
operating life : Operating life depends on environmental conditions (vacuum atmosphere). It is recommended that these lamps be used in an oil-free environment.
*We recommend using Hamamatsu deuterium lamp power supplies in order to obtain the full performance from our lamps (Refer to page 7 and 9).
4
RADIANT INTENSITY (µW/cm
2
•nm at 30 cm)
SYNTHETIC SILICA
(PROJECTING TYPE, 1 mm THICK)
M7628
Switching Type
0.1
UV GLASS
Unit
—
V
0.05
low deterioration of light output. The non-projecting type requires less
space and has a wider directivity since there is no projection, enabling
effective use of emitted light. The long-nose projecting type uses an
MgF
2
window and is suitable for vacuum ultraviolet applications. This
type is used with the tip of the nose inserted into the vacuum equipment.
250
(DC) 24
±
2.4
48
(DC) 80
(DC) 160
300
600
±
50
0.5
±0.1
See below
See below
25
0 to +40
20 CMF of forced air
100
×
118
×
36.2
0.17
UL/CE
0.01
160
200
240
280
320
360
400
Figure 3: External View
VA Max.
V Typ.
V Typ.
mA
V peak
% Max.
%/h Max.
—
—
s Typ.
°C
—
mm
kg
—
WAVELENGTH (nm)
Non-projecting type
Projecting type
Long-nose projecting type
Window Material
The following 4 types of window material are available for deuterium lamps.
(1) UV glass
(2) Synthetic silica
(3) MgF
2
Figure 2 shows the transmittance of various window materials.
UV light at wavelengths shorter than 190 nm attenuates greatly due to its
absorption by oxygen. To obtain the fullest performance in window trans-
mittance, it is recommended that the inside of the equipment be filled with
nitrogen or vacuum-evacuated to eliminate this absorption effect.
TLSOF0139
Figure 4: Directivity (Light Distribution)
Non-projecting type
30°
15°
0
Projecting type
Long-nose
Projecting type
30°
30°
20°
15°
10°
0
15°
0
Figure 2: Typical Transmittance of Various Window Materials
TLSOB0038EC
15°
100
10°
20°
30°
30°
30°
TLSOB0021EA
TLSOB0020EA
TLSOB0077EA
TRANSMITTANCE (%)
c typ.)
L6565, L7293, L6999, L6999-50
L7307, L7174, L6301, L6302
L6307, L6308, L7292
L7298, L6303, L6304, L7306
L7296, L7295, L6309, L6310, L7296-50
L6565, L7293, L6999, L6999-50
L7307, L7174, L6301, L6302
L7298, L6303, L6304, L7306
L6566, L6305, L6306
L6307, L6308, L7292
L7296, L7295, L6309, L6310, L7296-50
L6311, L6311-50, L6312, L6312-50
Applicable Lamps
80
Arc Distribution
60
MgF
2
SYNTHETIC SILICA
40
UV GLASS
20
100
150
200
250
300
350
Arc intensity is determined by the aperture (light exit) size. Figure 5
shows typical spectral distributions for lamps with different aperture sizes.
At the same input current and voltage, lamps with an aperture of 0.5 mm
diameter (high brightness type) provide 1.6 times higher brightness than
lamps with an aperture of 1.0 mm diameter (standard type). The half
width of spectral distribution also becomes narrower with a reduced aper-
ture size. When higher intensity is required or the object to be irradiated
is very small, the high brightness type is recommended.
WAVELENGTH (nm)
GUV
glass
UV glass has a higher ultraviolet transmittance than normal optical glass
(borosilicate glass). It has the longest cut off wavelength of 185 nm among
the four types. However the generation of ozone is lower than other wind-
ow material types, it is not necessary to have special anti-ozone treat-
ments.
Figure 5: Arc Distribution
APERTURE: 0.5 mm
APERTURE: 1.0 mm
(High Brightness Version)
(Standard Version)
0.5 mm
APERTURE
1.0 mm
APERTURE
GSynthetic
silica
Synthetic silica is obtained by fusing a silica crystal that is artificially
grown. Although its cut off wavelength is 160 nm, it contains less impuri-
ties than fused silica, and transmittance at 200 nm has been improved by
approx. 50 %.
Y
X
Y
X
GMgF
2
MgF
2
is a crystallized form of alkali metal halide that has an excellent
ultraviolet transmittance, a low deliquescence and is used as window
material for vacuum ultraviolet applications. Its cut off wavelength is 115
nm.
TLSOF0150
INTENSITY
INTENSITY
TLSOB0049EB
M7628
8
Analog electronics
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