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Title: MEMS-based self-referencing cascaded line-scan camera using single-pixel detectors
Authors: Li, L. 
Qi, Y.
Lim, Z.H. 
Zhou, G.
Chau, F.S. 
Zhou, G. 
Issue Date: 2019
Publisher: OSA - The Optical Society
Citation: Li, L., Qi, Y., Lim, Z.H., Zhou, G., Chau, F.S., Zhou, G. (2019). MEMS-based self-referencing cascaded line-scan camera using single-pixel detectors. Optics Express 27 (18) : 25457-25469. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: A microelectromechanical systems (MEMS) based self-referencing cascaded line-scan camera using single-pixel detectors is proposed and verified. Single-pixel detectors make it an attractive low-cost alternative of a traditional line-scan camera that can operate at any wavelength. The proposed system is composed of several identical cascaded line imager units driven by a common actuator. Each unit is an integration of an imaging slit, a MEMS encoding mask, a light concentrator and a single-pixel detector. The spatial resolution of the proposed line-scan camera can thus be N-fold immediately by cascading N units to achieve high spatial resolution. For prototype demonstration, a cascaded line-scan camera composed of two imager units are prepared, with each unit having a single-pixel detector and being capable of resolving 71 spatial pixels along the slit. Hadamard transform multiplexing detection is applied to enhance the camera’s signal-to-noise ratio (SNR). The MEMS encoding mask is resonantly driven at 250 Hz indicating an ideal frame-rate of 500 fps of the line-scan camera prototype. Further increase of frame-rate can be achieved through optimization of the MEMS actuator. Additionally, the MEMS encoding mask incorporates a self-referencing design which simplifies data acquisition process, thus enabling the camera system to work in a simple but efficient open-loop condition. © 2019 Optical Society of America.
Source Title: Optics Express
ISSN: 1094-4087
DOI: 10.1364/OE.27.025457
Rights: Attribution 4.0 International
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