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| Series 250 completes the family of LIQUID LIGHTGUIDES
with respect to the transmission of very short wavelengths
in the UVC range. Due to its outstanding photo chemical stability
Series 250 will deliver stable transmission from high intensity
UVC and UVB sources. |
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| Above measurements were made with an aperture
2α of 22° to enable a comparison with the quartz glass
fiber. However, while a quartz glass fiber only has a maximum
aperture 2α of 29°, Series 250 has an aperture of 50°.
A comparison at 50° aperture would further increase the
benefits of Series 250 over the quartz glass fiber bundle. |
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The new LIQUID LIGHTGUIDE Series 250 transmits
radiation down to a wavelength of 250nm, and with short lengths
even down to 220nm. As a result, applications requiring UVC
now also benefit from the advantages of LIQUID LIGHTGUIDES.
Important applications are wafer manufacturing, analytical
measurements, fluorescence, epoxy curing where UVC eliminates
the surface smear film, and photo therapy.
Additionally, critical applications with high power UV lasers
(i.e. 308nm excimer laser) are now possible with excellent
transmission stability.
The conventional light guides for the UVC
range are quartz fiber bundles, the core of an individual fiber
consisting of pure quartz glass and the cladding of doped quartz
glass. The most important advantages of LIQUID LIGHTGUIDES
Series 250 over quartz fiber bundles are: |
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In the wavelength range between 230 - 400nm
the transmission of LIQUID LIGHTGUIDES Series 250 is significantly
higher. |
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The theoretical maximum angle of aperture 2α is 50° for
Series 250 and only 29° for
quartz/quartz fiber bundles. Thus LIQUID LIGHTGUIDES Series 250 can transmit
more power from conventional, non coherent UV sources. |
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The costs for LIQUID LIGHTGUIDES Series 250 are only
a fraction of those for quartz
fiber bundles. |
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| However, LIQUID LIGHTGUIDES Series 250
show a dependence of transmission from the
radius of curvature R. For example, with an active core Ø3mm
and 2α=22° transmission
loss is below 3% for R>50mm. For 2α>22° bending
losses will be somewhat higher.
However, as extreme bending radii are usually avoided, bending
losses will be negligible
in most cases.
The long term operational temperature
range of LIQUID LIGHTGUIDES Series 250 is +5°C
to +30°C. When adapted to a light source, the light entrance
sleeve of the light guide
should not reach a temperature above 50°C.
LIQUID LIGHTGUIDES Series 250 are available in a variety
of end fittings and in lengths
of up to 5000mm. Special fittings can be made to customer
specifications. |
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| Dimensions
of Standard End Fittings (mm) |
| Active Core Ø |
Standard End Fittings |
Protective
Sleeve |
Minimum Bending Radius |
| d0 |
d1 |
l1 |
d2 |
l2 |
d3 |
l3 |
d4 |
|
| 3 |
5 |
20 |
9 |
30 |
- |
- |
7.5 |
50 |
| 5 |
7 |
20 |
10 |
24 |
13 |
24 |
10.5 |
70 |
| 8 |
10 |
20 |
15 |
40 |
- |
- |
12.5 |
120 |
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Specifications can change without notice.
 Download
.pdf document / 72 KB |
