9 May 2011 A3B5 photodiode sensors for low-temperature pyrometry
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Mid-infrared immersion lens photodiodes developed at the Ioffe Institute have high spectral selectivity (λmax/▵λ≈0.1...0.15) at different wavelengths -2.9, 3.3, 4.2 and 4.7 microns, the response time (up to 10-9s) and detectivity (D* ≈ 109-1011, (cm√Hz)/W) being significantly higher than those of currently known detectors of thermal radiation[1].The analysis of the transfer function of the temperature sensors based on A3B5 photodiodes has shown that they permit implementing the methods of color and two-color pyrometry providing a significant decrease of the methodical error in optical temperature measurements associated with unknown values of object surface emissivity and uncontrollable changes in the environment transmission.
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Galina Yu. Sotnikova, Galina Yu. Sotnikova, Sergey E. Aleksandrov, Sergey E. Aleksandrov, Gennadiy A. Gavrilov, Gennadiy A. Gavrilov, } "A3B5 photodiode sensors for low-temperature pyrometry", Proc. SPIE 8073, Optical Sensors 2011; and Photonic Crystal Fibers V, 80731A (9 May 2011); doi: 10.1117/12.886309; https://doi.org/10.1117/12.886309

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