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:
Nov. 19, 1991
Filed:
Sep. 01, 1989
Gunnar Wennerberg, Cupertino, CA (US);
Measurex Corporation, Cupertino, CA (US);
Abstract
A single sided reflectance sensor having an optical arrangement which permits accurate measurements of select physical properties of a moving sheet. The sensor comprises a protective enclosure, positioned adjacent to a sheet surface, containing an electromagnetic radiation source disposed to project an incident beam onto the sheet surface, a reflectance sensing means for sensing the intensity of the reflected portion of the incident beam, and a planar convex lens, located between the source and the sheet. The shape and orientation of the lens source and the sheet. The shape and cross-direction and/or render the sensor substantially insensitive to sheet flutter.