Ocean Optics S1024DW Install - Manual (Page 47)

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Fiber Optic Probes and Accessories
Ocean Optics fiber optic probes can be coupled to our miniature fiber optic spectrometers and light sources
to create a variety of optical-sensing systems. Each probe consists of silica-core, silica-clad optical fiber
(0.22 NA) and a sampling optic, and are available for UV-VIS (high OH content) or VIS-NIR (low OH
content) applications. All standard fiber optic probes are 2 meters in length and have SMA terminations.
Custom probe assemblies are also available.
Fiber Optic Probes and Accessories: R200 Reflection Probes
R200 R EFLECTION P ROBES couple to Ocean Optics miniature fiber optic spectrometers and light sources
to create small-footprint optical-sensing systems for fluorescence and reflection measurements. Ocean
Optics offers several variations on the Reflection Probe:
•
The R200-7 R EFLECTION P ROBE consists of a bundle of 7 optical fibers -- 6 illumination fibers
around 1 read fiber -- each of which is 200
µ
m in diameter. A 3.0” x 0.25” stainless steel ferrule
houses the fiber bundle. Other options of this standard probe assembly include the R400-7, which has a
bundle of optical fibers 400
µ
m in diameter, and the RP200-7, which has a 3.0” x 0.25” plastic ferrule
to house the fiber bundle. The RP200-7 is useful where a stainless steel ferrule may not be suitable,
such as some applications involving corrosive samples.
•
For reflection experiments across the UV-VIS-Shortwave NIR (200-1100 nm), users can specify the
R200-MIXED. The R200-MIXED consists of fourteen 200
µ
m-diameter optical fibers -- 6 UV/VIS
and 6 VIS/NIR illumination fibers, plus 1 UV/VIS fiber and 1 VIS/NIR read fiber. In addition, the
R200-MIXED has a 3.0” x 0.25” stainless steel ferrule to house its fiber bundles, and couples easily to
a dual-channel spectrometer in which each channel is set for a different wavelength range.
•
Also available is the R200-REF, which consists of an R200-7 Reflection Probe and an additional
fiber optic to monitor an illumination source such as our LS-1 Tungsten Halogen Light Source. The
R200-REF is useful when a reflection experiment either does not allow the user to take frequent
reference scans or requires an illumination source with an unstable spectral output.
•
One other option is the R200-ANGLE R EFLECTION P ROBE , which has a bundle of seven 200
µ
m
fibers -- 6 illumination fibers around 1 read fiber -- and a 3.0” x 0.25” stainless steel ferrule with a 45°
window. This angled window removes the effects of specular reflection when the probe is immersed in
dense liquids and powders.
Caution!
" " " " The distance from the probe tip to the sample directly affects the signal. For quantitative results, the
distance and angle must be held constant.
" " " " Handle with care. Dropping the probe may cause permanent damage.
Operation
The reflection probe consists of a 6-fiber leg that should be coupled to the light source, and a single-fiber
leg that goes to the spectrometer.
1. Inspect the ends of the fiber legs. The hole in the SMA connector is noticeably larger in the illumination
leg than the hole in the spectrometer leg. Also, the spectrometer leg should have colored bands.
2. Install the illumination leg in the light source.
3. Install the spectrometer leg in the spectrometer.
4. Using the RPH-1 Reflection Probe Holder or some other holding device, point the probe at the surface
to be measured.