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 language | English |
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Pages | 2685-2688 |
Number of pages | 4 |
DOIs | |
Publication status | Published - 9 Nov 2009 |
Event | IEEE International Conference on Image Processing - Cairo, Egypt Duration: 7 Nov 2009 → 10 Nov 2009 |
Conference
Conference | IEEE International Conference on Image Processing |
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Country/Territory | Egypt |
City | Cairo |
Period | 7/11/09 → 10/11/09 |
Keywords
- micromechanical devices
- sensor arrays
- photodetectors
- optical imaging
- mirrors
- micromirrors
- costs
- detectors
- electromagnetic scattering
- frequency