Interferometer spectrometer for discrete frequency analysis of e

Details Interferometer spectrometer for discrete frequency analysis of e Interferometer spectrometer for discrete frequency analysis of e

1974-11-07

1976-11-02

Smith, Jerry

Registers

Transfer mechanism

Traveling pawl

235156, 356106S, G06F 1534

Patent

active

039899381

ABSTRACT:
An interference spectrometer which analyzes an unknown light beam for determining the presence and amount of particular frequency by passing the light beam through an interferometer with a moving mirror, which transforms the beam into a first signal which represents the inverse Fourier transform of the electrical light beam. An associated laser beam is also processed by the interferometer and detected to give a second signal. The first signal is sampled at each periodic variation of the second to generate a discrete signal which is then digitized. A digital Fourier series frequency component synthesizer synthesizes preselected discrete frequency components of the incoming beam which correspond, for example, to the gaseous components of interest. A particular gas handling apparatus is disclosed which is adapted to handle unstable inhomogeneous gases such as automobile exhaust fumes.

REFERENCES:
patent: 3488123 (1970-01-01), Nichols
patent: 3556661 (1971-01-01), Hepner
patent: 3636333 (1972-01-01), Klund
patent: 3728030 (1973-04-01), Hawes
patent: 3745317 (1973-07-01), Berthier
Yoshinaga: A Far Infrared Interferometric Spectrometer with a Special Electronic Computer, Applied Optics, July 1966, vol. 5, No. 7, pp. 1159-1165.
Michel: Real Time Computer for Monitoring a Rapid-Scanning Fourier Spectrometer, Applied Optics, Nov. 1972, vol. 11, No. 11, pp. 2671-2674.

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