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:
Jun. 23, 1981
Filed:
Sep. 26, 1979
Jean Cornillault, Nozay, FR;
Compagnie Industrielle des Lasers, Marcoussis, FR;
Abstract
The invention relates to a device for determining the granulometric composition of a mixture of particles by diffraction of light. The light flux received on the diffraction pattern is measured in a number of diffraction areas (AI,AJ) each of which is in the shape of an angular sector of circular rings which are concentric with the pattern, these integration areas forming two successions in each of which the inner and outer radii form geometrical progressions with common ratio of two, the ratio between the outer radius and the inner radius of an integration area being chosen in the interval between two and the square root of two, the radii within one succession (AJ) being equal to those within the other (AI) multiplied by the square root of two. Application to studying powder mixtures.