The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 01, 2000
Filed:
Feb. 12, 1998
Kurt P Weckstrom, Helsinki, FI;
Matti Huiku, Helsinki, FI;
Instrumentarium Oy, Helsinki, FI;
Abstract
A radiation source assembly and transducer incorporating same are suitable for use in measuring spectral absorption properties of a substance to be analyzed, such as a gas. The radiation source assembly has an optical axis. A measuring radiation source provides radiation in the direction of the axis and a reference radiation source provides radiation in the direction of the axis. An optical diffuser is spaced from the radiation sources along the axis. Radiation from the measuring radiation source and radiation from the reference radiation source are applied to the diffuser and the diffuser forms an exiting radiation beam for the assembly from the radiation of the measuring radiation source and reference radiation source. The exiting radiation beam extends along the axis. In at least a portion of a cross-section of the exiting radiation beam taken perpendicular to the axis, the configuration of the distribution of the radiation from each of the sources as seen by a detector in generally the same so that the operation of the radiation source assembly resembles that of a single-path photometer. The transducer further includes the detector for receiving the exiting radiation beam after it has passed through the substance. The assembly and transducer may also include optical collecting and concentrating devices for directing radiation to the detector.