24 June 2014 Thermomechancial characterization in a radiant energy imager using null switching
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Thermomechanical noise for a MEMs-based infrared detector using null switching (US patent 7977635) depends on vibrational amplitude, since IR radiation is transduced to a change in the duty cycle of a repetitively closing switch. Equipartition theorem gives a maximum rms vibrational amplitude of 45 pm for the fabricated cantilever switch at its natural frequency. This gives a worst case timing uncertainty of 700 ns and an NEP of 2 pW/Sqrt[Hz].
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Javaneh Boroumand , Javaneh Boroumand , Imen Rezadad, Imen Rezadad, Ammar Alhasan, Ammar Alhasan, Evan M. Smith, Evan M. Smith, Robert E. Peale, Robert E. Peale, "Thermomechancial characterization in a radiant energy imager using null switching", Proc. SPIE 9070, Infrared Technology and Applications XL, 907020 (24 June 2014); doi: 10.1117/12.2052338; https://doi.org/10.1117/12.2052338

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