realization of moiré imaging by flat micro lens array

Feng Wu; Weiwei Zheng; Jiang Yu; Shiyu Chen; Su Shen

doi:10.1117/12.2506158

24 January 2019 Realization of Moiré imaging by flat micro lens array

Feng Wu, Weiwei Zheng, Jiang Yu, Shiyu Chen, Su Shen

Proceedings Volume 10840, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Micro- and Nano-Optics, Catenary Optics, and Subwavelength Electromagnetics; 1084009 (2019) https://doi.org/10.1117/12.2506158
Event: Ninth International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT2018), 2018, Chengdu, China

Abstract

Micro-focusing moiré imaging has found successful application in security and anti-counterfeiting. It comprises of a micro-lens array and a micro-pattern array to visually present impressive dynamic and stereoscopic visual effects. In this paper a moiré imaging device with new features is fabricated using the well-known techniques such as nanoimprinting and photoresist thermal reflow. The features of the moiré imaging device benefit from the novel configuration of the micro lens array. With the same aperture diameter , the Flat Micro Lens Array can realize moiré imaging on thicker substrate, which has better dynamic effect, compared to the moiré image achieved by the traditional microlens array. The working surface of the MLA is buried in the UV layer, and the microlens moiré device is not easily replicated. The Flat Micro Lens Array surface is flat, hard to worn, even if be worn does not affect the imaging quality. Due to the above features, the proposed moiré device has application in the field of anti-counterfeiting.

Citation Download Citation

Feng Wu, Weiwei Zheng, Jiang Yu, Shiyu Chen, and Su Shen "Realization of Moiré imaging by flat micro lens array", Proc. SPIE 10840, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Micro- and Nano-Optics, Catenary Optics, and Subwavelength Electromagnetics, 1084009 (24 January 2019); https://doi.org/10.1117/12.2506158

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KEYWORDS

Microlens

Imaging devices

Microlens array

Ultraviolet radiation

Refractive index

Adhesives

Visualization

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