PROTECTIVE MARK AND X-RAY DEVICE FOR READING THEREOF Russian patent published in 2019 - IPC G06K1/12 G06K19/10 

FIELD: physics.

SUBSTANCE: invention relates to means of marking objects and is intended for protection against counterfeit valuable objects, as well as for personal identification. Code mark contains a set of crystals which form diffraction signals when they are irradiated with an X-ray beam. Crystals are oriented such that during parallel transfer of their crystallographic directions to a common point they are located within a given solid angle, and points of intersection of said crystallographic directions with plane perpendicular to axis of said solid angle form elements of discrete image. For reading the code mark, a device is proposed, which includes an X-ray source, a convergent beam generating means, a two-coordinate detector and a radiation-protective screen transparent in the optical range with channels along the path of the incident and diffraction reflected radiation.

EFFECT: high reliability of storing data of the security mark, enabling concealed marking, as well as high reliability and speed of reading data.

8 cl, 12 dwg