This paper presents the design and fabrication of micro-lens arrays (MLAs) by Two Photon Polymerization (TPP) technology. First, a computer program is developed to construct a solid MLA model with a specified focal length and lens diameter. A TPP laser scanning path for MLA fabrication is then generated. MLAs are fabricated by TPP, with quality assessed by SEM. Finally, good quality 5  5 MLA squares with dimensions 108  108 are successfully manufactured.

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In this paper, we apply augmented reality technology to make human computer interface more technically advanced and interesting. We present a real-time face tracking system for augmented reality, which will be used in electronic commerce, to help shoppers acquire a more direct interaction with the products they purchase. A real-time face tracking mechanism can enhance the realism of online shopping. In order to emphasize the convenience and practicability of our system, we used plug-in functions and Principal Component Analysis (PCA) to conduct real-time face tracking and Neural Networks (NN) to reduce training time and achieve valid recognition. Convenience and uniqueness are the other main parts of this system.