Accession Number : ADA289611

Title :   Frequency Resolution of Acousto-Optical Spectrometer,

Corporate Author : NATIONAL AIR INTELLIGENCE CENTER WRIGHT-PATTERSON AFB OH

Personal Author(s) : Jingzheng, Wang ; Jianjun, Shen

PDF Url : ADA289611

Report Date : 16 DEC 1994

Pagination or Media Count : 16

Abstract : This paper discusses the frequency resolution of an acoustic-optical spectrometer system under influences of deflector's spectral resolution, coherent light-beam truncation ratio, and photodiode array's 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.

Descriptors :   *SPECTROMETERS, *ACOUSTOOPTICS, FOURIER TRANSFORMATION, FREQUENCY, MEASUREMENT, COMPUTATIONS, RESOLUTION, ARRAYS, SPECTRA, RESPONSE, LENGTH, TRANSLATIONS, PHOTODIODES, SIDELOBES, CHINA, LENSES, CHINESE LANGUAGE, DEFLECTORS.

Subject Categories : Acoustooptic and Optoacoustic Devices
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE