초록 ▼

A gas analyzer arrangement for detecting the presence or quantity of a gas of interest includes a source of electromagnetic radiation for directing a light beam through a light conditioning device such that the light beam is collimated into a parallel beam of light. The conditioned light beam is the

A gas analyzer arrangement for detecting the presence or quantity of a gas of interest includes a source of electromagnetic radiation for directing a light beam through a light conditioning device such that the light beam is collimated into a parallel beam of light. The conditioned light beam is then directed through a gas sample cell which contains a sample of the gas of interest. The gas of interest has associated therewith, vibrational rotational absorption lines specific to that gas and which are effective for altering the light beam according to the absorption characteristics thereof. The altered light beam is then directed to a birefringent etalon device which has been sized specifically to match those absorption lines of the gas of interest. An electro-optical modulator device associated with the birefringent etalon modulates the absorption lines between the transmission spectra maxima and a point between the transmission spectra maxima so that an absorption ratio can be utilized to determine the presence or quantity of the gas of interest.

대표청구항 ▼

An arrangement for measuring a property of a gas by its optical absorption characteristics, comprising: source of electromagnetic radiation; means for directing the electromagnetic radiation through the gas; an interferometric device filtering the electromagnetic radiation with a transmission sp

An arrangement for measuring a property of a gas by its optical absorption characteristics, comprising: source of electromagnetic radiation; means for directing the electromagnetic radiation through the gas; an interferometric device filtering the electromagnetic radiation with a transmission spectrum having one or more spectral maxima, the interferometric device including an electro-optical element; means for applying an electric field to the electro-optical element; means for varying the electric field between two predetermined field strengths such that the spectral maxima shift to exhibit differing degrees of coincidence with absorption lines associated with the gas; and means for detecting an intensity of the electromagnetic radiation following passage through the gas and through the interferometric device, and determining therefrom a property of the gas.