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A System to perform real-time Fourier spectroscopy

Author: Joseph Hoffman; Air Force Cambridge Research Laboratories (U.S.)
Publisher: L.G. Hanscom Field, Mass. : Air Force Cambridge Research Laboratories, Office of Aerospace Research, United States Air Force, 1968.
Series: Instrumentation papers, no. 146.; AFCRL, no. 68-401.
Edition/Format:   Print book : National government publication : EnglishView all editions and formats
Database:WorldCat
Summary:
A real-time system to perform Fourier spectroscopy is described. The spectral distribution is synthesized by the successive summation of cosine functions with amplitudes and frequencies which are determined by the sample points of the interferogram. Summation of these cosine functions is performed in a digital memory oscilloscope which has 1024 addresses. The design criteria and the principles of operation of the  Read more...
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Details

Material Type: Government publication, National government publication
Document Type: Book
All Authors / Contributors: Joseph Hoffman; Air Force Cambridge Research Laboratories (U.S.)
OCLC Number: 318201347
Notes: "August 1968."
AD0676969 (from http://www.dtic.mil).
Optical Physics Laboratory Project 8603, 000D.
Research supported by the Air Force Cambridge Research Laboratories, Office of Aerospace Research, United States Air Force, L.G. Hanscom Field, Bedford, Massachusetts.
Description: ix, 108, [13] pages : illustrations ; 28 cm.
Series Title: Instrumentation papers, no. 146.; AFCRL, no. 68-401.
Responsibility: Joseph E. Hoffman, Jr.

Abstract:

A real-time system to perform Fourier spectroscopy is described. The spectral distribution is synthesized by the successive summation of cosine functions with amplitudes and frequencies which are determined by the sample points of the interferogram. Summation of these cosine functions is performed in a digital memory oscilloscope which has 1024 addresses. The design criteria and the principles of operation of the system are discussed in detail. Sources of error are examined and several methods of error reduction are discussed. The limitations of this type of system are described and improvements are recommended. Experimental data are presented and the performance of the real-time system is compared to that of a special purpose analog computer, and a digital computer. (Author).

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