How do I baseline correct when measuring a coating on a solid sample?

  • For solid sample transmission measurements, baseline correction generally involves measurements on air with no sample mounted.
  • However, to measure the transmission characteristics of only the film or coating on a substrate, before measuring the sample, perform baseline correction on a blank substrate with no film or coating applied.
  • As it may be impossible to obtain accurate measured results at wavelengths where the blank substrate exhibits high absorbance, it is extremely important to confirm the transmission characteristics of the blank substrate.
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