Accession Number : AD0704588

Title :   AN INTRODUCTION TO FOURIER SPECTROSCOPY.

Descriptive Note : Rept. for Jun-Oct 69,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Hall,Richard T.

Report Date : 15 JAN 1970

Pagination or Media Count : 63

Abstract : Fourier spectroscopy is a technique discovered by Michelson in 1891 that recently began its renaissance with the advent of high-speed digital computers. Examples of results that were obtained with Fourier spectroscopic techniques to measure spectra of the planets in the near-infrared and spectra of gases in the far infrared are shown. The principles of Fourier spectroscopy are explained along with comments on practical techniques. A brief description of the computational techniques are given and a comparison of the advantages and disadvantages of Fourier spectroscopy versus conventional grating spectroscopy is made. The Aerospace Corporation's far-infrared, lamellar-grating interferometer is described and some results obtained while using it are shown. The prospects for the future of Fourier spectroscopy are also discussed. (Author)

Descriptors :   (*INFRARED SPECTROSCOPY, FOURIER ANALYSIS), (*ASTROPHYSICS, INFRARED SPECTROSCOPY), (*INTERFEROMETERS, *INFRARED SPECTRA), CARBON DIOXIDE, ISOTOPES, CHLORIDES, AMMONIA, DEUTERIUM COMPOUNDS, WATER, NITROGEN OXIDES, VENUS(PLANET)

Subject Categories : Astrophysics
      Test Facilities, Equipment and Methods
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE