Determination of the Baseline in the IR Spectra of External Reflection of Polymers for 3D Objects

Abstract

A methodology for forming a baseline of infrared (IR) spectra of external reflection for objects with a smooth non-flat surface is proposed. The procedure for forming a baseline provides conditions for the correct application of the Kramers-Kronig method. The method is tested in determining the complex refractive index of 3D objects made of polymeric materials.