Spatial correlations between two photons are the key resource in realising many quantum imaging schemes. Measurement of the bi-photon correlation map is typically performed using single-point scanning detectors or single-photon cameras based on charged coupled device (CCD) technology. However, both approaches are limited in speed due to the slow scanning and the low frame rate of CCD-based cameras, resulting in data acquisition times on the order of many hours. Here, we employ a high frame rate, single-photon avalanche diode (SPAD) camera, to measure the spatial joint probability distribution of a bi-photon state produced by spontaneous parametric down-conversion, with statistics taken over 10⁷ frames. Through violation of an Einstein–Podolsky–Rosen criterion by 227 sigmas, we confirm the presence of spatial entanglement between our photon pairs. Furthermore, we certify, in just 140 s, an entanglement dimensionality of 48. Our work demonstrates the potential of SPAD cameras in the rapid characterisation of photonic entanglement, leading the way towards real-time quantum imaging and quantum information processing.

两个光子之间的空间相关性是实现许多量子成像方案的关键资源。双光子相关图的测量通常使用基于电荷耦合器件（CCD）技术的单点扫描检测器或单光子相机进行。但是，由于基于CCD的相机的扫描速度慢和帧速率低，两种方法的速度都受到限制，导致数据获取时间约为数小时。在这里，我们使用高帧频的单光子雪崩二极管（SPAD）相机来测量通过自发参数下转换产生的双光子状态的空间联合概率分布，其统计数据超过10 ⁷框架。通过违反爱因斯坦-波多尔斯基-罗森准则227 sigma，我们确认了光子对之间存在空间纠缠。此外，我们仅在140 s内证明了纠缠维数为48。我们的工作证明了SPAD相机在快速表征光子纠缠中的潜力，从而引领了实时量子成像和量子信息处理的道路。