title: Fast time-lens-based line-scan single-pixel camera with multi-wavelength source.
abstract: A fast time-lens-based line-scan single-pixel camera with multi-wavelength source is proposed and experimentally demonstrated in this paper. A multi-wavelength laser instead of a mode-locked laser is used as the optical source. With a diffraction grating and dispersion compensating fibers, the spatial information of an object is converted into temporal waveforms which are then randomly encoded, temporally compressed and captured by a single-pixel photodetector. Two algorithms (the dictionary learning algorithm and the discrete cosine transform-based algorithm) for image reconstruction are employed, respectively. Results show that the dictionary learning algorithm has greater capability to reduce the number of compressive measurements than the DCT-based algorithm. The effective imaging frame rate increases from 200 kHz to 1 MHz, which shows a significant improvement in imaging speed over conventional single-pixel cameras.
authors.affiliation: Tsinghua National Laboratory for Information Science and Technology (TNList), Department of Electronic Engineering, Tsinghua University, Beijing, 100084, China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Guo
authors.affiliation: Tsinghua National Laboratory for Information Science and Technology (TNList), Department of Electronic Engineering, Tsinghua University, Beijing, 100084, China.
authors.forename: Hongwei
authors.initials: H
authors.lastname: Chen
authors.affiliation: Tsinghua National Laboratory for Information Science and Technology (TNList), Department of Electronic Engineering, Tsinghua University, Beijing, 100084, China.
authors.forename: Zhiliang
authors.initials: Z
authors.lastname: Weng
authors.affiliation: Tsinghua National Laboratory for Information Science and Technology (TNList), Department of Electronic Engineering, Tsinghua University, Beijing, 100084, China.
authors.forename: Minghua
authors.initials: M
authors.lastname: Chen
authors.affiliation: Tsinghua National Laboratory for Information Science and Technology (TNList), Department of Electronic Engineering, Tsinghua University, Beijing, 100084, China.
authors.forename: Sigang
authors.initials: S
authors.lastname: Yang
authors.affiliation: Tsinghua National Laboratory for Information Science and Technology (TNList), Department of Electronic Engineering, Tsinghua University, Beijing, 100084, China.
authors.forename: Shizhong
authors.initials: S
authors.lastname: Xie
keywords: (060.2350) Fiber optics imaging; (110.0110) Imaging systems; (260.2030) Dispersion