Fellgett advantage
E646033
The Fellgett advantage is the signal-to-noise benefit in multiplex spectroscopic techniques, where measuring all wavelengths simultaneously improves sensitivity compared to scanning methods.
Statements (40)
| Predicate | Object |
|---|---|
| instanceOf |
multiplex advantage
ⓘ
signal processing concept ⓘ spectroscopy concept ⓘ |
| alsoKnownAs | multiplex advantage ⓘ |
| appliesTo |
Fourier transform infrared spectroscopy
NERFINISHED
ⓘ
Fourier transform spectroscopy NERFINISHED ⓘ Hadamard transform spectroscopy NERFINISHED ⓘ multiplex spectroscopy ⓘ |
| assumes | uncorrelated detector noise across measurements ⓘ |
| category |
noise reduction technique
ⓘ
spectroscopic advantage ⓘ |
| comparedTo | sequential acquisition of individual wavelengths ⓘ |
| contrastsWith |
dispersive spectroscopy
ⓘ
scanning monochromator methods ⓘ |
| dependsOn | detector-noise-limited regime ⓘ |
| describes |
benefit of multiplex spectroscopic techniques
ⓘ
signal-to-noise ratio improvement ⓘ |
| doesNotHoldIn | photon-noise-limited regime ⓘ |
| effect |
improved signal-to-noise ratio compared to scanning methods
ⓘ
increased sensitivity for a fixed measurement time ⓘ reduced measurement time for a given signal-to-noise ratio ⓘ |
| field |
Fourier transform spectroscopy
NERFINISHED
ⓘ
optics ⓘ signal processing ⓘ spectroscopy ⓘ |
| historicalContext | introduced in the context of early Fourier transform spectrometers ⓘ |
| influences |
choice between multiplex and dispersive instruments
ⓘ
design of Fourier transform spectrometers ⓘ |
| keyIdea |
all spectral elements are measured simultaneously
ⓘ
multiplexing improves sensitivity under detector-noise-limited conditions ⓘ |
| mathematicalForm | SNR improvement proportional to square root of number of multiplexed channels (under ideal conditions) ⓘ |
| measurementMode | simultaneous acquisition of all spectral elements ⓘ |
| namedAfter | P. B. Fellgett NERFINISHED ⓘ |
| relatedTo |
Jacquinot advantage
ⓘ
multiplexing ⓘ throughput advantage ⓘ |
| usedIn |
Raman spectroscopy
NERFINISHED
ⓘ
astronomical spectroscopy ⓘ infrared spectroscopy ⓘ nuclear magnetic resonance spectroscopy ⓘ |
Referenced by (1)
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