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. 07, 1990
Filed:
Aug. 24, 1989
Albert Wiesmeier, Merklingen, DE;
Manfred Griesinger, Leonberg, DE;
Daimler-Benz AG, , DE;
Abstract
In a process and arrangement for measuring a physical quantity using an optical sensor, for imparting a power modulation proportional to the measured quantity on an effective light flux, the physical quantity being obtained from a ratio of the luminous power of the effective light flux to that of a reference light flux, to achieve a high path neutrality of an optical transmission path, the spectral distribution S(.lambda.) of the effective light flux and the spectral distribution R(.lambda.) of the reference light flux is selected according to the relation: ##EQU1## with .lambda.min<.lambda..sub.1 <.lambda..sub.2 <.lambda. max, the light source being emitting in the wave range between the wavelengths .lambda.min and .lambda.max.