FINGERPRINT RECORDING DEVICE

摘要

The invention relates to optically forming fingerprint pictures, in particular to device for producing fingerprint cards used by low-enforcement authorities. The aim of said invention is to improve the quality of fingerprint recording by removing a moisture influence on a obtainable picture without the low-size of the device. The inventive fingerprint recording device comprises a prism having at least three working faces, wherein the first face is adjacent to the second and third faces, optically interconnected radiation sources, a projection system and a system of photoreceiving elements,which are positioned in front of the second prism face, and a signal processing unit which is electrically connected to the system of photoreceiving elements, wherein the first face is used for perceiving fingerprints, the second face is simultaneously used as the input and output face for a light beam, the third face of the prism is embodied such that it is reflecting and is provided with a mirror coating, the angle between the first and second faces ranges from 90 to 62°, the angle between the first and third faces ranges form 76 to 90° and the second prism face is used as the input radiation refracting face.