【摘要】 光学边缘检测技术具有高速并行计算、高通量处理等优势，近年来受到越来越多的关注。然而，如何实现动态可调的光学边缘检测仍是一个具有挑战性的难题。基于此，提出一种可在多方向上实现光学边缘检测并快速切换的方案。基于铁电液晶材料制备了一种快速可调波片，同时利用图案化光取向技术制备向列相液晶q波片。实验结果表明，结合上述两种液晶元件可高质量地实现一维边缘检测，并在低电压下通过翻转电场极性实现两个正交方向上低至35μs的快速切换。该方案基于铁电液晶提供了灵活的边缘检测动态调控手段，有望促进液晶元件在光计算、光学图像处理等领域的应用。更多还原

【Abstract】 Optical edge detection technology has the advantages of high-speed parallel computing and high-throughput processing, and has attracted more and more attention in recent years. However, how to achieve dynamically adjustable optical edge detection is still a challenging problem. Based on this, a scheme of optical edge detection and fast switching in multiple directions is proposed. A fast tunable wave plate was fabricated based on ferroelectric liquid crystals, and a nematic liquid crystal q-plate was fabricated using photopatterning alignment technology. The experimental results show that the combination of the above two liquid crystal elements can achieve one-dimensional edge detection with high quality, and realize fast switching in two orthogonal directions as low as 35 μs by flipping the polarity of the electric field at low voltage. Based on ferroelectric liquid crystals, this scheme provides a flexible dynamic manipulation method for edge detection, which is expected to promote the application of liquid crystal elements in optical computing, optical image processing and other fields.更多还原