6/3/2023 0 Comments Solid converter pdf full mega![]() ![]() An original peak-retrieval procedure is proposed, demonstrating accurate determination of peak lineshapes and linewidths and robustness on practical examples where conventional methods would not be applicable. The method requires multiple shifts of the diffraction gratings to extract the pixel-dependent noise structure, which is then used as a flat-field correction. The final noise level can therefore be reduced as desired by sufficient integration time. The principle of the method is to subtract the dominant fixed-structure noise and obtain a shot-noise limited spectrum. A simple method using standard spectrometers with charge-coupled device (CCD) detectors is described to routinely measure background-corrected spectra in situations where the signal is composed of weak spectral features (such as Raman peaks or absorption lines) engulfed in a much stronger (by as much as ∼10 5) broad background.
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