MICROOPTICAL IMAGING SYSTEM FOR INSTRUMENTAL AND VISUAL CONTROL OF PRODUCT AUTHENTICITY

摘要

A microoptical imaging system for instrumental and visual control of product authenticity claimed as an invention is related primarily to devices used for certifying authenticity of products, and can be used efficiently for protection of excise labels, notarial, right-stating, shipping, implementation documents, securities, and various consumer products against counterfeiting. The microoptical system according to the invention comprises a flat reflecting phase optical element that forms a linear or two-dimensional bar code in white light at small diffraction angles. At large diffraction angles, the microoptical system forms another colour image for visual identification of product authenticity. In case of illumination with coherent light, the microoptical system forms an image for instrumental control in a plane parallel to the plane of the optical element. The combination of essential features of the invention provides attainment of the technical result that consists in higher reliability of control of protected products due to obtaining an easily controlled visual effect, and in the possibility of instrumental control by the microoptical system in coherent light. Implementation of the microoptical system for forming visual images using existing standard equipment is possible.