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:
Jul. 20, 1982
Filed:
Aug. 11, 1980
Hartwig Ruell, Mount Laurel, NJ (US);
Siemens Corporation, Iselin, NJ (US);
Abstract
There is disclosed an input sensor unit for a fingerprint verification system. A sensor plate facing a fingerbed is composed of a transparent polymer which is elastic so as to form a latent topographic relief of a finger pattern. A sensing light beam is coupled into the sensor plate through one edge surface. An output light beam emitted through a planar surface of the sensor plate at the opposite side of the fingerbed is directed onto the light sensitive area of an electro-optical sensing array. In the optical path of the output light beam there is arranged an optical lens for focusing the output light beam onto the light sensitive area and an optical filter for masking out the direct light of the output light beam.