Abstract
We propose an extension of the periodic temperature change (Chynoweth) technique for the measurement of pyroelectric coefficient in the case of a pyroelectric thin film on an insulating (non-conductive) substrate. The modified technique adequately determines the pyroelectric coefficient of the film if its thickness is known. The method determines the pyroelectric coefficient of the substrate even if it is much smaller than that of the film. The method overestimates the thickness of the pyroelectric film and can be used as an estimate only. If the thickness of the pyroelectric film is not known, the method gives a product of the pyroelectric coefficient of the film and its thickness.
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