Liu Xue-Feng, Yao Xu-Ri, Wang Chao, Guo Xiao-Yong, Zhai Guang-Jie
Opt Express. 2017 Feb 20;25(4):3286-3296. doi: 10.1364/OE.25.003286.
We experimentally demonstrate that the sensitivity of photon-counting imaging can be improved by 2 orders of magnitude with the compressed sensing (CS) theory. The maximum sensitivity of CS imaging under the quantum limit, which is approximately 1 photon in each pixel during one measurement, is quantitatively obtained through theoretical derivation and proved experimentally. The influences of dark noise and shot noise on photon-counting imaging are also studied to confirm the fundamental constrains on the imaging sensitivity of different imaging methods, which can guide the effort for further enhancing the ultra-weak light imaging ability.
我们通过实验证明，利用压缩感知（CS）理论可将光子计数成像的灵敏度提高2个数量级。通过理论推导定量得出了CS成像在量子极限下的最大灵敏度，即在一次测量中每个像素约为1个光子，并通过实验得到了验证。还研究了暗噪声和散粒噪声对光子计数成像的影响，以确定不同成像方法对成像灵敏度的基本限制，这可为进一步提高超弱光成像能力提供指导。
