Textbook in PDF format

This document is a simplified, concise introduction to Fourier transform spectroscopy. The emphasis is on elementary concepts and comprehension, and abundant diagrams are provided as an aid. The work is organized into three parts: first, a selective, but adequate review of Fourier transform mathematics, next, a treatment of the physics of a simple Michelson interferometer, and last, salient topics in Fourier transform spectroscopy