Dr. Hao Zhong Profile

Dr. Hao Zhong

at Soochow Univ

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Proceedings Article | 15 February 2022 Paper

Large-format, full-color moiré imaging device by high resolution inkjet printing

Hao Zhong, Gangyao Zhan, Su Shen

Proceedings Volume 12166, 121666F (2022) https://doi.org/10.1117/12.2617754

KEYWORDS: Imaging devices, Printing, Inkjet technology, Image resolution, 3D image processing, Patents, Microlens array, Information security, Microlens

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Moiré imaging, achieved by superimposing a layer of microlens array (MLA) and micropattern array (MPA), has already be proven useful in a range of applications from art to engineering. Due to the sensitivity to small variations in the MPA , moiré imaging device require high resolution machine to produce. Here we report a colorful, inkjet-printable, resolution up to 4800 dpi moiré imaging device. By utilizing the RGB inkjet printing technology, full-color moiré image can be produced with strikingly visual effect. Moiré imaging device with large-format (<300mm) can be realized to achieve the visually striking motion and 3D effect as varying the viewing angle. The moiré image is coded as a micropattern packed repeatedly, and the imaging heights is determined by the repeated period of micropattern. Therefore, we achieve moiré image with complex imaging heights by varying the period of the micropattern. Injection molding process for manufacturing MLA, is a technology that has proven to be stable and reliable in actual production. The proposed moiré imaging device, with obvious 3D perception to the naked eye, is inexpensive, mass-producible and convenient for authentication. We demonstrate the quality of the device by theoretical calculation and manufacturing. Such device can find potential applications in the field of anti-counterfeiting, information encryption and decoration, etc.

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