DEVICE FOR SIMULTANEOUS CONTACT-BASED TAKING OF IMPRESSIONS OF AUTOPODIUM

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...

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Bibliographic Details
Main Authors RICHTER, Undine, MORGENEIER, Dirk, REINHOLD, Jörg, RIEHL, Philipp, KRENZER, Daniel, HILLMANN, Jürgen
Format Patent
LanguageEnglish
French
German
Published 21.02.2024
Subjects
BLASTING
CALCULATING
COMPUTING
COUNTING
FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF
HEATING
LIGHTING
MECHANICAL ENGINEERING
PHYSICS
STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR
WEAPONS
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Summary: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.
Bibliography:Application Number: EP20180181754