The effect of a single defective mask element on the output signal-to-noise ratio (SNR) for a stationary-mask Hadamard transform (HT) spectrometer is investigated. The decrease in output-SNR from that of an HT spectrometer having a perfect mask is found to be dependent on the amount of energy impinging on the defective element. A method of compensating for the defective mask element is presented. The method is computationally inexpensive and can be fully automated.
HarwitM.SloaneN. J. A., Hadamard Transform Optics (Academic Press, New York, 1979).
2.
HammakerR. M.GrahamJ. A.TilottaD. C.FateleyW. G., “What is Hadamard Transform Spectroscopy?” in Vibrational Spectra and Structure, DurigJ. R. Ed. (Elsevier, Amsterdam, 1986), Vol. 15, pp. 401–485.
