Porzio Bromberg & Newman P.C.
Optical security device with full parallax diffraction optical variable image
The present invention discloses an optical security device with full parallax diffraction optical variable image, the optical security device comprises: a base layer; and an optical assembly at least partially covering a surface of the base layer; wherein the optical assembly has a micro relief structure, so that when a beam of white light illuminates on the optical assembly, the optical assembly presents a full parallax image under the action of the micro relief structure. The present invention obtains the micro relief structure through combining the phase plate, and achieves the reconstruction of the full parallax diffraction optical variable image under the condition of white light illumination.
ZHONGCHAO SPECIAL SECURITY TECHNOLOGY CO., LTD
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Xiaoli Xinyi Jun Chengyao
Wang Li Zhu Li