Measurement of a Michelson Interferometer Mirror Velocity With a Time Interval Analyzer.

摘要

This report documents the design, construction, and implementation of a time interval analyzer (TIA). The TIA is a precision counter that measures the dynamic variation in the time intervals (i.e., frequency) of a signal. The helium-neon (HeNe) laser signal from the servo mirror control circuitry of the interferometer provides a nearly constant frequency source. The HeNe signal frequency is directly proportional to the interferometer mirror velocity. A constant velocity is crucial for the proper operation of a Michelson interferometer, which is used in a Fourier transform spectrometer. The TIA provides a critical evaluation of velocity variations in a single interferometer mirror scan via analysis of the HeNe laser signal.... Time interval counter, Time interval analyzer, Fourier transform spectroscopy.