13 February 2012 Considerations for DMDs operating in the infrared
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Proceedings Volume 8254, Emerging Digital Micromirror Device Based Systems and Applications IV; 82540J (2012); doi: 10.1117/12.905667
Event: SPIE MOEMS-MEMS, 2012, San Francisco, California, United States
Abstract
The evolution of the DMD has enabled the development of a broad range of technologies from sensors to various types of devices such as projectors and displays. The low cost and excellent reliability has made the DMD an ideal choice for most applications requiring a spatial light modulator. The aluminum micromirrors can be used over a broad spectral range with an appropriate window; DMD-based systems have therefore been realized across the ultraviolet through and including the longwave infrared. Of particular interest for scene projector, compressive imaging, and spectrometer applications is the use of the DMD in the infrared where diffraction, instrument radiance, and optical resolution impose performance limits. Diffraction and instrument radiance, among other factors, impact the highest achievable contrast, and constraints on the lowest practical illumination and projection f/# limit the ability to resolve a single micromirror at longer wavelengths. In this paper, we present analytical models addressing these issues as well as demonstrated solutions in a DMD-based midwave infrared (MWIR) scene projector as well as a MWIR compressive imaging camera.
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Julia Rentz Dupuis, David J. Mansur, "Considerations for DMDs operating in the infrared", Proc. SPIE 8254, Emerging Digital Micromirror Device Based Systems and Applications IV, 82540J (13 February 2012); doi: 10.1117/12.905667; http://dx.doi.org/10.1117/12.905667
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KEYWORDS
Digital micromirror devices

Surface plasmons

Projection systems

Micromirrors

Sensors

Diffraction

Infrared imaging

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