Symptom: Roughness, Speckles, Mars, Bubbles

Possible Causes: What could cause this problem?

Contamination: surface or embedded processing problem (trapped gas)

Sample Testing Plan: How do you measure?

  • 1. Isolate surface or embedded material
  • 2. Measure using single-bounce Diamond, ZnSe or Ge* ATR
*Ge for carbon-filled polymers

Data Analysis: How do you identify the problem?

  • 1. Search libraries to identify contamination
  • 2. Change process to avoid contamination