Accession Number:

ADA289611

Title:

Frequency Resolution of Acousto-Optical Spectrometer,

Descriptive Note:

Corporate Author:

NATIONAL AIR INTELLIGENCE CENTER WRIGHT-PATTERSON AFB OH

Personal Author(s):

Report Date:

1994-12-16

Pagination or Media Count:

16.0

Abstract:

This paper discusses the frequency resolution of an acoustic-optical spectrometer system under influences of deflectors spectral resolution, coherent light-beam truncation ratio, and photodiode arrays response. The broadening of the resoluble line-pattern caused by the response of a photodiode pixel has been computed. According to this discussion the authors proposed the selecting principles for design parameters of the acousto-optical spectrometer including light-beam truncation ratio, focal length of Fourier transform lens, and number of photodiode array elements, i.e. the quantitative criteria for specific observational necessities with an acousto-optical spectrometer considered with resolution, bandwidth, and sidelobes of instrumental profile comprehensively. An experimental measurement of the frequency resolution to verify above theoretical computations has also been carried out.

Subject Categories:

  • Acoustooptic and Optoacoustic Devices
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE