Priedhorsky William, Bloch Jeffrey J
Los Alamos National Laboratory, Mail Stop B241, Los Alamos, New Mexico 87545, USA.
Appl Opt. 2005 Jan 20;44(3):423-33. doi: 10.1364/ao.44.000423.
We compare the sensitivity of photon-counting and charged-coupled-device (CCD) imagers for rapidly moving objects. Our test case involves the detection of small objects in space, seen against a diffuse zodiacal light background, as observed from a space platform. We contrast photon-counting detectors, with excellent time resolution and negligible readout noise, against CCDs with a significantly larger quantum efficiency. For fast moving objects and small fields of view, the photon-counting detectors are able to detect significantly smaller targets, with the added benefit of providing angle-angle-time metric information in addition to high-time-resolution light curves. For larger fields of view and slower moving objects, the CCDs are more sensitive. These results may motivate the further development of microchannel-plate photon-counting systems and amplified CCDs for detecting and tracking space objects.
我们比较了光子计数成像仪和电荷耦合器件（CCD）成像仪对快速移动物体的灵敏度。我们的测试案例涉及从太空平台观测时，在弥漫的黄道光背景下检测太空中的小物体。我们将具有出色时间分辨率和可忽略读出噪声的光子计数探测器与具有显著更高量子效率的CCD进行对比。对于快速移动的物体和小视场，光子计数探测器能够检测到明显更小的目标，除了提供高时间分辨率的光变曲线外，还额外提供角度 - 角度 - 时间度量信息。对于较大视场和移动较慢的物体，CCD更灵敏。这些结果可能会推动微通道板光子计数系统和增强型CCD的进一步发展，用于检测和跟踪太空物体。
