In this study, a visible light photon-counting imaging detector was developed for weak light intensities, such as biofluorescence and photon-counting 3D imaging radars. The proposed visible light photon-counting imaging detector was based on a semitransparent S25 photocathode able of responding to visible light or even near-infrared wavelengths. The detector adopted image charge readout mode through high-resistance Ge layer receiver of electron cloud from the microchannel plate. The performance of the as-obtained visible light photon-counting imaging detector was tested in existing readout electronics and newly designed position-sensitive anodes. The quantum efficiency of the as-prepared detector reached 13.4% (@532 nm) with spatial resolution better than 100 μm. Preliminary imaging results of real objects with commercial lens and detector were also obtained and applied to ultra-weak light detection. In sum, these results look promising for future applications in photon-counting radars and biofluorescence imaging.

在这项研究中，针对弱光强度开发了一种可见光光子计数成像探测器，例如生物荧光和光子计数 3D 成像雷达。所提出的可见光光子计数成像探测器基于能够响应可见光甚至近红外波长的半透明 S25 光电阴极。探测器采用图像电荷读出方式，通过微通道板电子云的高阻锗层接收器。在现有的读出电子设备和新设计的位置敏感阳极中测试了所获得的可见光光子计数成像探测器的性能。所制备的探测器的量子效率达到 13.4% (@532 nm)，空间分辨率优于 100 μm。还获得了使用商用镜头和探测器对真实物体的初步成像结果，并将其应用于超弱光探测。总而言之，这些结果对于未来在光子计数雷达和生物荧光成像中的应用很有希望。