Datacolor 800, 850, 500, and 550 Series User’s Guide 30
Total, Diffuse, and Haze Transmittance
When measuring the transmittance of translucent samples that contain particles, such as
engineered resins or opal glass, you are measuring either “total” or “diffuse” transmittance.
The samples should be positioned at the front of the transmission compartment, close to
the sphere opening.
“Total” transmittance measurements are made with the white Spectralon® plaque in place
at the front aperture plate and the sample placed against the sphere opening.
“Diffuse” transmittance measurements are made with the black trap in place at the front
aperture plate and the sample placed against the sphere opening.
Haze assessments are made using two measurements, one with the white Spectralon®
plaque, the other with the black trap installed at the front aperture plate. For both
measurements, the sample must be placed against the sphere opening.
NOTES
Use the solid sample holder to place the solid sample flush against the sphere opening. In
order to ensure the best measurement, there must be no gap between the sample and the
sphere opening in “Total”, “Diffuse”, or Haze measurements.
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