Accession Number : AD0709720

Title :   DOUBLE BEAMING IN FOURIER SPECTROSCOPY,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Dowling,Jerome M.

Report Date : 21 JUL 1970

Pagination or Media Count : 69

Abstract : In two-beam interferometry, it is not the spectrum which is measured, but rather a quantity called the interferogram is obtained. The interferogram is related to the spectrum by a Fourier transformation. Because of this difference in what is measured there are a number of problems encountered in Fourier spectroscopy which are of no consequence in conventional single slit dispersive spectroscopy. One of these is the dynamic range problem, which can be very serious in absorption type Fourier spectroscopy. Another is the unfamiliar form the raw data (i.e., the interferogram) takes in Fourier spectroscopy. These and other problem areas are illustrated and remedial procedures discussed. (Author)

Descriptors :   (*INTERFEROMETERS, *MOLECULAR SPECTROSCOPY), FOURIER ANALYSIS, ABSORPTION SPECTRA

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

Distribution Statement : APPROVED FOR PUBLIC RELEASE