Multichannel, optical-fiber-based spectrometer

Details Multichannel, optical-fiber-based spectrometer Multichannel, optical-fiber-based spectrometer

1986-05-07

1988-07-05

McGraw, Vincent P.

Optics: measuring and testing

By shade or color

With color transmitting filter

250227, G01J 351

Patent

active

047550546

ABSTRACT:
An optical-fiber-based spectrometer utilizes a compact, P-C-board-mountable optical multiplexer which permits multiple channels of reference and measurement data from remote and hostile environments to be analyzed in rapid sequence utilizing synchronized computer data-storage and comparison to give rapid-fire answers to the question of the presence or absence of species of interest in a sample or process being analyzed, the relative light level in the reference and data channels being balanced by an optical attenuator having only an air path, attenuation being effected by controlled misalignment of optical fiber ends.

REFERENCES:
patent: 3697185 (1972-10-01), Kassel et al.
patent: 3999062 (1976-12-01), Demsky et al.
patent: 3999864 (1976-12-01), Mutter
patent: 4241738 (1980-12-01), Lubbers et al.
Jauch "A Portable Rapid Spectrophotometer for Color Studies" J Phys. E. Sci. Instrum., vol. 12, #12, Dec. 1979, pp. 1171-1175.

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