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ISO 9001:2008
Detector Frequency Response

To determine system frequency

At a given chopping frequency (F), detector responsivity (Rf) is related to its responsivity at 0 Hz (R0) as follows:



where τ is the detector time constant.

PbS and PbSe detectors exhibit typical 1/f noise, and accordingly, at a given chopping frequency, detectivity, D*(f) can be expressed as:



Typical frequency response of PbS/PbSe detectors is shown below:

Detector Frequency Response - To determine system frequency.