Multispectral imaging using a single bucket detector.
Existing multispectral imagers mostly use available array sensors to separately measure 2D data slices in a 3D spatial-spectral data cube. Thus they suffer from low photon efficiency, limited spectrum range and high cost. To address these issues, we propose to conduct multispectral imaging using a single bucket detector, to take full advantage of its high sensitivity, wide spectrum range, low cost, small size and light weight. Technically, utilizing the detector's fast response, a scene's 3D spatial-spectral information is multiplexed into a dense 1D measurement sequence and then demultiplexed computationally under the single pixel imaging scheme. A proof-of-concept setup is built to capture multispectral data of 64 pixels × 64 pixels × 10 wavelength bands ranging from 450 nm to 650 nm, with the acquisition time being 1 minute. The imaging scheme holds great potentials for various low light and airborne applications, and can be easily manufactured as production-volume portable multispectral imagers.
Department of Automation, Tsinghua University, Beijing 100084, China.
Liheng
L
Bian
Department of Automation, Tsinghua University, Beijing 100084, China.
Jinli
J
Suo
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China.
Guohai
G
Situ
Department of Automation, Tsinghua University, Beijing 100084, China.
Ziwei
Z
Li
Department of Automation, Tsinghua University, Beijing 100084, China.
Jingtao
J
Fan
Department of Automation, Tsinghua University, Beijing 100084, China.
Feng
F
Chen
Department of Automation, Tsinghua University, Beijing 100084, China.
Qionghai
Q
Dai