The intrinsic nature of many astronomical objects, such as binary systems, exoplanets, circumstellar disks, and quasar host galaxies, introduces challenging requirements on observational instrumentation and techniques. In each case, we encounter situations where the light from bright sources completely outshines the surrounding faint targets. As a result, we are yet to fully understand the processes governing star and galaxy formation and evolution, and there are ongoing attempts to search for habitable worlds around other stars. To explore all features of such astronomical objects, we must perform observations at the maximum possible contrast ratios. Here, we demonstrate the extreme contrast ratio imaging capabilities of the latest generation of commercially available charge injection devices, the SpectraCAM XDR, using Sirius field observations from a world-class observing site. Based on wavelet-based image analysis and precise photometric calibration, we report a direct contrast ratio of 1 part in 100 million.

许多天体的内在性质，例如双星系统、系外行星、环星盘和类星体宿主星系，对观测仪器和技术提出了具有挑战性的要求。在每种情况下，我们都会遇到来自明亮光源的光线完全超过周围微弱目标的情况。因此，我们还没有完全了解恒星和星系形成和演化的过程，并且正在不断尝试寻找其他恒星周围的宜居世界。为了探索这些天文物体的所有特征，我们必须以最大可能的对比度进行观察。在这里，我们展示了最新一代商用电荷注入设备 SpectraCAM XDR 的极高对比度成像能力，使用来自世界级观测站的天狼星野外观测。基于基于小波的图像分析和精确的光度校准，我们报告了 1 亿分之一的直接对比度。