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The technique of the derivative spectroscopy is discussed as an effective way to filter the unwanted contents in the source spectrum. The transfer function obtainable for the technique is derived in the theoretical analysis, and the advantages achievable by the technique are discussed in connection with this transfer function. Finally, the conditions and limits within which a good approximation to the mathematical derivative of the observable spectrum are given.
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Stauffer et al. (1968) studied this question.
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