State Key Laboratory of Modern Optical Instrument, NERC for Optical Instrument, Optical Engineering Department, Zhejiang University, Hangzhou, 310027, China.
Opt Lett. 2011 Apr 15;36(8):1434-6. doi: 10.1364/OL.36.001434.
Depth resolution is limited by the photoelectron shot noise in conventional gain-modulated active three-dimensional (3D) imaging methods. A proposed method, which is based on photon intensity correlation, is presented to overcome the depth resolution limitation. The signal photons are amplified by an imaging intensifier, and are then divided into two beams by a beam splitter. The theory shows that the shot-noise limitation is broken using the strong intensity coherence between the two beams. The experiment results show that the depth resolution of the correlated active 3D imaging method is three times better than that of the shot-noise limitation.
传统的调制增益型主动三维（3D）成像方法的深度分辨率受到光电子散粒噪声的限制。本文提出了一种基于光子强度关联的方法来克服深度分辨率限制。该方法采用像增强器对信号光子进行放大，然后通过分束器将其分为两束。理论表明，利用两束光之间的强强度相干性可以打破散粒噪声限制。实验结果表明，相关主动 3D 成像方法的深度分辨率比散粒噪声限制提高了三倍。
