Accession Number:

ADA273105

Title:

Mirror Velocity Sampling Errors in a Michelson Interferometer

Descriptive Note:

Final rept. Jun 1992-May 1993

Corporate Author:

EDGEWOOD RESEARCH DEVELOPMENT AND ENGINEERING CENTER ABERDEEN PROVING GROUND MD

Personal Author(s):

Report Date:

1993-09-01

Pagination or Media Count:

46.0

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 spectrometers 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.

Subject Categories:

  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE