Mirror Velocity Sampling Errors in a Michelson Interferometer
Abstract
Mirror velocity variations in a continuous mirror drive Michelson interferometer result in erroneous interferogram sampling. The effects of systematic and random mirror fluctuations are evaluated. Four methods of evaluation provide a means to quantify the importance of mirror velocity errors in the Fourier spectrometer's performance as a spectroradiometer. The four methods are time interval signal analysis, sine wave test, optical chopper modulation, and examination of consecutive interferograms. Examination of consecutive interferograms includes the monitoring of a constant blackbody infrared radiation source as well as an interposed ammonia sample cell for wavenumber axis registration. Each method furnishes a known input to the interferometer modulation equation (i.e., 2tm = f) and permits an internal validation of the interferometer mirror velocity evaluation results. Time interval-analysis, Michelson interferometry, Infrared fourier transform spectrometry.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1993
- Accession Number
- ADA273105
Entities
People
- P. E. Field
- R. B. Knapp
- R. J. Combs
Organizations
- Edgewood Chemical Biological Center