We offer a series of Fiber Optic Reflection / Backscattering Probes that couple to our spectrometers and light sources to create small-footprint optical-sensing systems for measuring reflection and fluorescence in liquids and powders.
Our angled probes also have a six-around-one design, but employ a 30° window to remove specular reflection effects when the probe is immersed in powders or dense solutions. We offer the angled probe with two different diameter fibers, 200 µm and 400 µm. Our Angled Reflection / Backscattering Probes can be ordered from our Laboratory-grade and Premium-grade assembly product lines. |
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| Our Reflection / Backscattering Probes are based on a natural close-packing arrangement of optical fibers. Typically, the arrangement is a tight bundle of seven optical fibers -- six illumination fibers around one read fiber. This arrangement ensures parallel orientation of the fibers. The center or read fiber splits from the other six fibers and couples to a spectrometer. The outer six illumination fibers connect to the light source. |
| Fiber profile: | Step-index multimode |
| Fiber core: | Pure silica core |
| Fiber cladding: | Fluorine-doped silica cladding |
| Fiber buffer/coating: | Polyimide coating |
| Fiber bundle: | 6 illumination fibers around 1 read fiber |
| Operating temperature range: | -20 °C to 80 °C |
| Numerical aperture: | 0.22 ± 0.02 (yields an acceptance angle of 24.8° in air) |
| Probe ferrule: | Stainless steel except where noted |
| Probe connector(s): | Premium-grade SMA 905 Connectors for QR-series probes, Laboratory-grade SMA 905 Connectors for R-series probes |
| Breakout: | Midway of assembly at 1 meter |
| Total probe length: | 2 meters long for fiber assembly, 76.2 mm long for probe ferrule = 2.076 meters total length; custom lengths available |
| Item Code | Wavelength Range | Core Diameter | Fiber Jacketing | Probe Ferrule | LTBR* | STBR** | Price |
| QR200-ANGLE-U | 300-1100 nm | 200 µm ± 4 µm | silicone monocoil | 6.35 mm OD | 8 cm | 4 cm | $692 |
| QR200-ANGLE-V | 400-2500 nm | 200 µm ± 4 µm | silicone monocoil | 6.35 mm OD | 8 cm | 4 cm | $692 |
| QR400-ANGLE-U | 300-1100 nm | 400 µm ± 8 µm | silicone monocoil | 6.35 mm OD | 16 cm | 8 cm | $866 |
| QR400-ANGLE-V | 400-2500 nm | 400 µm ± 8 µm | silicone monocoil | 6.35 mm OD | 16 cm | 8 cm | $866 |
| R200-ANGLE-UV | 300-1100 nm | 200 µm ± 4 µm | zip tube blue PVDF | 6.35 mm OD | 8 cm | 4 cm | $577 |
| R200-ANGLE-VIS | 400-2500 nm | 200 µm ± 4 µm | zip tube blue PVDF | 6.35 mm OD | 8 cm | 4 cm | $577 |
| R400-ANGLE-UV | 300-1100 nm | 400 µm ± 8 µm | zip tube blue PVDF | 6.35 mm OD | 16 cm | 8 cm | $692 |
| R400-ANGLE-VIS | 400-2500 nm | 400 µm ± 8 µm | zip tube blue PVDF | 6.35 mm OD | 16 cm | 8 cm | $692 |
* LTBR stands for Long Term Bend Radius, the bend radius allowed long term (such as for storage) before damaging the fiber.
** STBR stands for Short Term Bend Radius, the momentary bend radius allowed before damaging the fiber.
| Reflection from Solid Surfaces for Color and Appearance, Chemical Composition | Backscattering in Liquids and Powders for Color and Appearance, Chemical Composition |
| Plastics, metals, paints and coatings; thin films and optical filters | Milk and other beverages |
| Inks, dyes and graphics arts | Paints, inks and dyes |
| Industrial textiles and clothing | Resins and bulk powders |
| Biomedical samples such as human skin and other cellular tissue | Suspended particulate matter in slurries and turbid liquids |
| Plants, marine life | Fluorescence of liquid samples |