Multiple-camera defocus imaging of ultracold atomic gases
Multiple-camera defocus imaging of ultracold atomic gases
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DOI：
10.1364/oe.422981
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发表时间：
2021-05-24
期刊：
影响因子：
3.8
通讯作者：
Spielman, I. B.
中科院分区：
文献类型：
--
作者：
Perry, A. R.;Sugawa, S.;Spielman, I. B.
在冷原子实验中，原子系综折射和吸收的每一个光的图像都携带着大量的信息。通常使用许多成像技术，包括吸收、荧光和相衬。其他技术，如离共振散焦成像（ORDI，[1 - 4]），其中聚焦图像是从散焦图像去卷积，已被证明，但只找到利基应用。ORDI反演过程引入了系统性伪影，因为它依赖于正则化来解释某些空间频率处的缺失信息。在目前的工作中，我们扩展了ordi同时使用多个相机的散焦度，消除了正则化及其伴随的文物的需要。我们证明了这种技术通过成像玻色-爱因斯坦凝聚体，并表明，在测量的柱密度使用多相机离共振散焦（McORD）成像方法的统计不确定性是有竞争力的吸收成像近共振和相衬成像远离共振。在实验上，McORD方法可以被并入现有的设置中，只需最少的额外设备。(C)2021年美国光学学会根据OSA开放获取出版协议的条款
In cold atom experiments, each image of light refracted and absorbed by an atomic ensemble carries a remarkable amount of information. Numerous imaging techniques including absorption, fluorescence, and phase-contrast are commonly used. Other techniques such as off-resonance defocused imaging (ORDI, [1-4]), where an in-focus image is deconvolved from a defocused image, have been demonstrated but find only niche applications. The ORDI inversion process introduces systematic artifacts because it relies on regularization to account for missing information at some spatial frequencies. In the present work, we extend ORDI to use multiple cameras simultaneously at degrees of defocus, eliminating the need for regularization and its attendant artifacts. We demonstrate this technique by imaging Bose-Einstein condensates, and show that the statistical uncertainties in the measured column density using the multiple-camera off-resonance defocused (McORD) imaging method are competitive with absorption imaging near resonance and phase contrast imaging far from resonance. Experimentally, the McORD method may be incorporated into existing set-ups with minimal additional equipment. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement