【摘要】 对分数相关级次对输出面能量分布的影响进行了理论分析 ,并通过对 Zalevsky等所提出的实时结构的考察 ,讨论了分数傅里叶变换 (fractional Fourier transform ,FRT)分立光学元件实现特点 .按照分数相关优化原则 ,提出了一种实用化的光电混合 FRT结构 ,并通过数值方法对此系统特性进行了研究 ,结果表明 :与传统相关比较 ,FRT提高了相关器的模式识别性能 .更多还原

【Abstract】 The impact of the orders of fractional correlation on the energy distribution on the output plane was analyzed theoretically, and then the characteristic of the bulk optical implementation of FRT was discussed deeply through re examining a real time configuration proposed by Zalevsky et al. According to correlation sharpness criteria, a practical implementation of FRT was proposed based on opto electronic hybrid configuration and its performance was studied by numerical method. Results show that the FRT improves the correlator performance for pattern recognition indeed as compared with the conventional correalation.更多还原