Xu Ping, Hong Chunquan, Cheng Guanxiao, Zhou Liang, Sun Zhilong
Opt Express. 2015 Mar 9;23(5):6773-9. doi: 10.1364/OE.23.006773.
Planar optical correlators (POCs) can achieve smaller volume of optical system and hence have important applications to identify dynamic targets in complex scenarios. POCs, however, generally have serious astigmatism and optical efficiency loss introduced by its refractive lens with a zigzag optical beam. To conquer the disadvantages of POCs, we propose a type of binary optical planar-integrated optical correlator. The correlator incorporates two pieces of reflective binary optical lens as Fourier transform lens and one spatial light modulator as a programmable filter. The off-axis aberrations commonly occurred in POCs can be corrected by using reflective binary optical lens instead of refractive lens. As a model of hybrid numerical-optical correlator using optoelectronic interface, the proposal is helpful to improve the integration and flexibility and robustness of POCs.
平面光学相关器（POC）能够实现更小体积的光学系统，因此在复杂场景中识别动态目标方面具有重要应用。然而，POC通常存在严重的像散以及由其具有曲折光束的折射透镜引入的光学效率损失。为克服POC的缺点，我们提出了一种二元光学平面集成光学相关器。该相关器包含两片作为傅里叶变换透镜的反射式二元光学透镜以及一片作为可编程滤波器的空间光调制器。通过使用反射式二元光学透镜而非折射透镜，可以校正POC中常见的离轴像差。作为一种使用光电接口的混合数值 - 光学相关器模型，该提议有助于提高POC的集成度、灵活性和鲁棒性。
