Optical imaging with scanning MEMS mirror: a single photodetector approach

L. Li, M.A. Mirza, V. Stankovic, Lijie Li, Lina Stankovic, D.G. Uttamchandani, S. Cheng

Research output: Contribution to conferencePaper

1 Citation (Scopus)


This paper describes an optical system for low-complexity optical image acquisition based on a single scanning MEMS mirror and a single photodetector. The overall aim of the research is to investigate techniques for image acquisition at electromagnetic wavelengths where the cost and/or technical maturity of detector arrays pose a limitation. In contrast to similar systems built using a digital micromirror device (DMD), the present configuration has advantages of lower cost and potential applicability across a wide spectrum, ranging from visible to Terahertz frequencies. In the present arrangement, light at visible wavelengths from the object passes through a telescope and falls onto a small, scanning MEMS micromirror. The entire image of the object is projected onto the mirror surface and reflected towards a single photodetector with a pinhole at its entrance. Similarly to conventional scanning, by finely changing the tilt-angle of the mirror, the detector sees different areas of the projected image, thereby building up an image pixel-by-pixel. Resolution is increased by allowing for an overlap between neighbouring scanned areas. Iterative bilinear interpolation and wavelet denoising are employed to enhance image quality.
Original languageEnglish
Number of pages4
Publication statusPublished - 9 Nov 2009
EventIEEE International Conference on Image Processing - Cairo, Egypt
Duration: 7 Nov 200910 Nov 2009


ConferenceIEEE International Conference on Image Processing


  • micromechanical devices
  • sensor arrays
  • photodetectors
  • optical imaging
  • mirrors
  • micromirrors
  • costs
  • detectors
  • electromagnetic scattering
  • frequency


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