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. 17, 2020
Filed:
Sep. 10, 2019
Jenetric Gmbh, Jena, DE;
Philipp Riehl, Jena, DE;
Joerg Reinhold, Jena, DE;
Juergen Hillmann, Jena, DE;
Tom Michalsky, Leipzig, DE;
Daniel Krenzer, Wutha-Farnroda, DE;
Holger Femel, Rothenstein, DE;
Wolfgang Jaehne, Rothenstein, DE;
JENETRIC GmbH, Jena, DE;
Abstract
A device for direct optical recording of skin prints offers recording of human skin prints for personal identification permitting a display layer directly below the placement surface. A light guide layer arranged below the sensor layer has at least one LED at a narrow side and light out-coupling structures which, by means of an inclination angle c and differences in the refractive indices relative to neighboring layers, permit a directed coupling out of light at a defined angle which results in total internal reflection at the placement surface at the air interface and with a small divergence angle range of ≤+/−15°. A first adhesion layer between cover layer and sensor layer and a second adhesion layer between sensor layer and light guide layer are provided, the refractive indices of which are 1% to 30% lower than the refractive indices of light guide layer and sensor layer.