Datacolor 800, 850, 500, and 550 Series User’s Guide 29
Transmittance Measurements
Three techniques are used to measure the transmittance of samples: “regular”
transmittance, “total” transmittance and “diffuse” transmittance.
Regular Transmittance
When working with samples that are completely transparent (such as dyes in solution or
transparent plastics) you are measuring “regular” transmittance. These samples need to be
positioned close to the lens opening at the back of the transmission compartment using
either the cuvette holder or solid sample holder as appropriate:
Regular Transmittance