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US 4,536,090 AGranted
Optical multi-beam gas measuring apparatus
AssigneeDragerwerk Aktiengesellschaft
InventorsMartin Schmidt, Horst D. Hattendorff
Life of this patent
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AssigneeDragerwerk Aktiengesellschaft
InventorsMartin Schmidt, Horst D. Hattendorff
Estimating the term…
An optical multi-beam gas measuring apparatus is intended for detecting specific content in a gas of extraneous gases which absorb the same wavelength of the measuring radiation. The apparatus comprises a source of radiation and a gas vessel through which the gas mixture to be measured is conducted and the radiation is detected. The radiation directed through the vessel is picked up by an exchangeable detecting unit which contains a prism for splitting radiation which has passed through the gas mixture into several partial beams corresponding to the number of gas components to be measured. A prism is selected for this purpose and it is used in association with optical filters arranged in the path of the beams in conjunction with detectors which are electronically arranged for detecting the selected gases and measuring the value thereof.
An optical multi-beam gas measuring apparatus for measuring proportions of a gas mixture, comprising:
A method of measuring a gas mixture, comprising directing a radiation through the gas mixture and passing the radiation after it passes through the gas mixture through a one piece prism which is symmetrical about a plane which is parallel to the radiation to split it into a plurality of discrete radiation beams, using a collective lens to focus the beams, passing each beam through an optical filter and arranging an electrical detector in each of the beams passing through the optical filter to detect the characteristic of the gas mixture.
Dependencies are inferred from the claim text.