Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1975-07-03
1977-11-29
Evans, F. L.
Optics: measuring and testing
Range or remote distance finding
With photodetection
G01J 342
Patent
active
040603261
ABSTRACT:
The present invention provides an optical instrument for measuring concentrations of polluting gases on long and short geometric paths. The apparatus comprises a telescope for focussing a ray of light into a spectrometer, a comparison cell containing a known concentration of a polluting gas, control means and an electronic apparatus adapted to determine the concentration of the polluting gas in the analytical sample.
REFERENCES:
patent: 3700332 (1972-10-01), Decker, Jr.
Antisari Ottavio Vittori
Bonafe Ubaldo
Cesari Giulio
Giovanelli Giorgio
Tirabassi Tiziano
Evans F. L.
Tecneco S.p.A.
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