The joint transform correlator ( jtc ) is paid more attention by researchers than the matched filtering correlator ( mfc ) with its advantages , such as high spatial bandwidth product , without integrated filtering and real - time operation etc . photorefractive crystals have some advantages , such as fast response , high spatial resolution and large storage capacity etc . we can exert both advantages by combining the photorefractive crystal with the jtc 与匹配滤波相关器相比，联合变换相关器具有诸多优点，如空间带宽积高、无需滤波综合、易于实时操作等，所以近年来更加引起人们的研究兴趣。光折变晶体具有响应速度快、空间分辨率高、存储容量大等优点。将光折变晶体与联合变换相关器相结合构成光折变联合变换相关器，就可以充分发挥二者的优势。
After leading vr into tele - operation , we can resolve : ( l ) the tasks are continued to be executed by information from virtual environment ( ve ) , when distant vision is blocked ; ( 2 ) me operator also rely on pre - display system of ve to finish real - time tele - operation , when there are communication postpone ; ( 3 ) the convenient training is also provided 在遥控操作中引入虚拟现实技术后，可以解决： ( 1 )当远程环境的视觉被遮挡时，可利用虚拟环境提供的可视信息继续工作； ( 2 )当用户与远程环境有通讯延迟时，可利用虚拟环境预显示系统进行实时操作； ( 3 )可为用户提供方便的训练系统。
