红外雪崩光电二极管阵列的高速成像和波前探测
High-speed imaging and wavefront sensing with an infrared avalanche photodiode array
摘要：
红外雪崩光电二极管阵列代表了天文学许多分支的灵丹妙药，可以在近红外波长进行极低噪声，高速甚至光子计数测量。我们最近演示了使用早期的工程级红外雪崩光电二极管阵列，实现了相关的双采样读取噪声为0.73 e-在实验室中，和2.52 e-在天空中的总噪声，并支持同时高速成像和倾斜波阵面传感与Robo-AO可见光激光自适应光学系统在帕洛玛天文台1.5米望远镜。我们在这里报告的改善图像质量，同时在可见光和红外波长的图像稳定控制回路的一部分，自适应光学锐化导星使用的阵列。我们还讨论了一个新启用的调查附近的晚M-矮星多样性，以及未来使用这种技术在其他自适应光学和高对比度成像应用。
英文摘要：
Infrared avalanche photodiode arrays represent a panacea for many branches of astronomy by enabling extremely low-noise, high-speed and even photon-counting measurements at near-infrared wavelengths. We recently demonstrated the use of an early engineering-grade infrared avalanche photodiode array that achieves a correlated double sampling read noise of 0.73 e- in the lab, and a total noise of 2.52 e- on sky, and supports simultaneous high-speed imaging and tip-tilt wavefront sensing with the Robo-AO visible-light laser adaptive optics system at the Palomar Observatory 1.5-m telescope. We report here on the improved image quality achieved simultaneously at visible and infrared wavelengths by using the array as part of an image stabilization control-loop with adaptive-optics sharpened guide stars. We also discuss a newly enabled survey of nearby late M-dwarf multiplicity as well as future uses of this technology in other adaptive optics and high-contrast imaging applications.
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