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)

Abstract

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
Pages2685-2688
Number of pages4
DOIs
Publication statusPublished - 9 Nov 2009
EventIEEE International Conference on Image Processing - Cairo, Egypt
Duration: 7 Nov 200910 Nov 2009

Conference

ConferenceIEEE International Conference on Image Processing
CountryEgypt
CityCairo
Period7/11/0910/11/09

Keywords

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

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