Ocean Optics SpectroClip Probe - Manual (Page 13)

1: Setup and Operation
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4. Assemble the fiber cover and tighten the three screws. The spiral coiled tube should begin inside
the fiber cover.
5. To record a dark spectrum, use the black/ white reference with the black side turned to the
reflectance sphere.
6. To record a reference spectrum use your SpectroClip without any object between the clamps.
7. Clamp your measuring object into your SpectroClip and start the measurement.
Caution
Don’t use samples thicker than 5 mm. With thicker samples, the amount of
unwanted stray light increases.
Transmission Measurement Loss of Intensity
It is recommended to use the same distance between integrating spheres to measure the reference spectra
as was used for the sample measurement. The loss of intensity for a port difference of 1 mm is 3 %
@620 nm with respect to zero difference. Other losses of intensity for the reference spectra are shown in
the table below.
Fiber and Diameter Distances (Valid for Optical Alignment)
Fiber Diameter (µm) Maximum Port Difference Loss in Reference Spectrum (relative to 0 distance)
100 8 10%
400 4 10%
Adjustment of the 8° Coupling Port
You can adjust the focus of the light beam between the upper fiber and the opening of the reflectance
sphere.
► Procedure
To adjust the focus,
1. Loosen the screw on the SMA connector (#7 in
SpectroClip Parts
) with the hexagon socket screw
key (SW 1.3 mm).
2. Move the SMA connector for optical performance.
3. Block the screw after adjustment.