Simultaneous transmission of periodic spectral components by plu

Details Simultaneous transmission of periodic spectral components by plu Simultaneous transmission of periodic spectral components by plu

1974-11-26

1976-10-05

Grimm, Siegfried H.

Optics: measuring and testing

Oil testing

356106S, G01B 902, G01J 344

Patent

active

039841901

ABSTRACT:
A method and apparatus for analyzing light are provided. Light having spectral components periodic in frequency is collected, collimated and transmitted by light conditioning means to a first interferometric means. The first interferometric means selectively separates a preselected periodic spectrum from the light and transmits such spectrum in the form of a fringe having an intensity derived from and substantially equal to the combined intensities of the transmitted spectra. A second interferometric means adapted to receive the fringe transmits the preselected periodic spectrum thereof in the form of a modified fringe providing a detectable signal. The portion of total intensity of the modified fringe derived from the combined intensities of the transmitted spectrum is greater than that of the fringe in the presence of unwanted spectra.

REFERENCES:
patent: 3853404 (1974-12-01), Barrett
Barrett et al., "Use of Air Bearings in the Construction of a Scanning Fabry-Perot Interferometer", Applied Optics, vol. 11, Sept. 1972, pp. 2100-2101.
Cooper et al., "Rapid Scanning of Spectral Line Profiles Using an Oscillating Fabry-Perot Interferometer", J. Sci. Instrum., vol. 40, Sept. 1963, pp. 433-437.
Mack et al, "The PEPSIOS Purely Interferometric High-Resolution Scanning Spectrometer," Applied Octics, vol. 2, Sept. 1963, pp. 473-485.

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