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:
Jan. 22, 1991
Filed:
Mar. 21, 1988
Gerard Meijer, Nijmegen, NL;
Peter Andresen, Dransfeld, DE;
Gerd E Meier, Roringen, DE;
Hans W Luelf, Goettingen, DE;
Max-Planck-Gesellschaft . . . e.V., Goettingen, DE;
Abstract
Method and apparatus for contactless locally resolved instantaneous measurement of the density and/or temperature of a gas in a measurement volume which can have a relatively large area and a relatively small thickness, wherein by laser radiation two rotational transitions of a molecular constituent of the gas excitation in which the excited state has a life time which is substantially shorter than the reciprocal collision frequency in the gas, and wherein the fluorescence intensity or absorption corresponding to the two rotational transitions is measured. From the measured intensities the density and temperature can be calculated.