在分析传统光学相位编码技术特性的基础上,提出了一种可实用化的光学相位防伪掩模设计方法。该方法采用二维条码编码技术,将用于防伪的文本或图像信息编码为二维条码,然后基于传统相位编码技术将该二维条码编码为光学相位防伪掩模。采用较低量化阶数的防伪掩模进行解码后,利用图像形态学相关算法成功恢复出原二维条码的准确编码信息,进而通过二维条码解码得到原始的文本和图像。该设计方法不但有效解决了传统光学相位编码方法的物理实现难题,而且还具有安全性高、成本低、防伪性能好等优点,为推动新一代光学防伪掩模的市场化应用提供了有效的技术途径。

This paper proposes a practical design method for an optical phase anti-counterfeiting mask based on the analysis of the characteristics of traditional optical phase-coding technology. A two-dimensional (2D) barcode is used to encode text or image information for anti-counterfeiting into a 2D barcode, and then the 2D barcode is encoded into an optical phase anti-counterfeiting mask based on the traditional phase-coding technology. After decoding the anti-counterfeiting mask with a lower quantization order, accurate encoding information of the original 2D barcode can be successfully restored using image morphology-related algorithms, and the 2D barcode is decoded to obtain the original text and image. The proposed design method not only effectively solves the physical implementation problems of traditional optical phase-coding methods but also exhibits the advantages of high security, low cost, and good anti-counterfeiting performance, which provides an effective technical approach to promote market-oriented applications of new-generation optical anti-counterfeiting masks.