Gas analyzer with means for varying angle of incidence of light

Details Gas analyzer with means for varying angle of incidence of light Gas analyzer with means for varying angle of incidence of light

1985-04-09

1987-05-05

LaRoche, Eugene R.

Optics: measuring and testing

By shade or color

Fluid color transmission examination

250343, G01N 2100

Patent

active

046627553

ABSTRACT:
A gas analyzer provided with apertures on the optical paths from a light source through a cell to sensors and multi-layer interference band-pass filters on the respective optical paths. The structure makes it possible to change the distance between each sensor and the corresponding aperture, or the change the size of the aperture, for changing the maximum angle of incidence of light on the filters which is sensed by the sensors to thus change the central wavelength of the filters.

REFERENCES:
patent: 3940623 (1976-02-01), Hempowitz et al.

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