Apr-09
111
Avantes
www.avantes.com
5.3
Fiber optic Reflection probes
We can make almost any type of arrangement as fiber optic reflectance probe. The standard
configuration is a 6 illumination around 1 read fiber, which is 2 meters long. All probes can be
delivered with UV/VIS or VIS/NIR fibers.
Technical data
Fibers
7 or 19 fibers 200 m or 400 m core, 6 or 17 light-fibers, 1 or 2 read fiber,
n.a.= 0,22. Standard 2m length, splitting point in the middle.
Wavelength range
200-800 nm (UV/VIS) or 350-2000 nm(VIS/NIR)
Connectors
Standard SMA905 connectors (2x)
Probe end
Stainless steel cylinder, 50 mm long x 6,35 mm diameter.
Tubing
The optical fibers are protected by a PVC inner tube and a flexible chrome
plated brass outer tubing. The tubing also gives stress relief. OD: 5.0 mm
Temperature
-30 C to 100 C. (High Temperature Probes available on request)
Bending
Minimum bend radius: Short term (few seconds) 20 mm, long term: 60 mm
Please follow the next rules:
1.
Gently remove the plastic protection caps from the fiber SMA connectors.
2.
Inspect the fibers if light is transmitted, note that for small fiber diameters the transmitted light
energy may be low, so it is hard to see.
3.
Do not bend the fiber too tightly, the minimum recommended bending radius of a fiber is 600
times the core/cladding diameter (i.e. 12 cm for a 200µm fiber), further bending may induce
losses in optical transmittance. Bending the fiber below a radius of 200 times the fiber diameter
may cause irreversible damage.
4.
Keep connectors and tips protected by the plastic caps when not in use.
5.
When necessary the fiber end can be cleaned with soft tissue and alcohol or acetone, avoid
scratching.
6.
Do not exceed temperature specifications.
In our standard quality assurance procedure, each fiber optic assembly is labeled with a serial nr,
and some standard test are being carried out with a spectrometer and AvaLight-CAL Line source and
registered:
1.
Spectral attenuation at 253 nm for UV/VIS fibers, spectral atten. at 763 nm for VIS/NIR fibers.
2.
Symmetries of the connector for both sides; the maximal peak value is allowed to move as many
nm as the registered resolution of the fiber / spectrometer.
3.
Optical inspection of scratches on the surface.
4.
A Deep-UV burn-in of 8 hours to pre-solarize the -SR assemblies, the atten at 215nm is
registered.
There is always a label attached to the fiber optic cable or assembly that will tell you the serial nr,
so the QA data can be retraced.
