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Calculation of NET (Noise Equivalent Temperature) for a Thermal (Black) Pyroelectric IR Detector

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Calculation of NET (Noise Equivalent Temperature) for a Thermal (Black) Pyroelectric IR Detector

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The NET (Noise Equivalent Temperature) is defined as the minimum detectable temperature such that the signal from the detector through the optics is equal to its noise (SNR = 1). When characterizing the NET we must define the optical power on the detector's active area in terms of a minimum temperature difference or DT causing that power difference or excitance.

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