Device for the contact-based simultaneous capture of prints of autopodia

US10366273B2 · kind B2 · utility

Assignee

• JENETRIC GmbH · DE

Inventors

• Joerg Reinhold · Jena, DE
• Dirk Morgeneier · Jena, DE
• Daniel Krenzer · Ruhla, DE
• Juergen Hillmann · Jena, DE
• Philipp Riehl · Jena, DE
• Undine Richter · Jena, DE

Key dates

• Filing date: Aug 30, 2018
• Grant date: Jul 30, 2019
• Expiry date: Aug 30, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G06V40/1329
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A device for contact-based capture of human autopodial prints using disturbed total internal reflection, comprising a protective body with a contact surface, a sensor layer comprising light-sensor elements in an array for detecting light of a predefined wavelength range, and a light guide. Passband areas transparent for light of the predefined range are between the sensor elements. The light guide is transparent to light in the range and includes parallel lower and upper faces. The faces define a coupling-in surface for light emitted from a light source in a limited angular range around a preferred direction. Due to the directed angle of incidence, light entering the light guide is totally internally reflected at the faces. A mirror layer between the sensors and the guide reflects some light back into the light guide and transmits other light. Light exiting the guide is homogenized dependent upon a distance to the light source.