Talk:Fourier-transform spectroscopy

SNR

As noted in the Fellgett advantage article, this statement: The Fellgett advantage, also known as the multiplex principle, states that when obtaining a spectrum when measurement noise is dominated by detector noise (which is independent of the power of radiation incident on the detector), a multiplex spectrometer such as a Fourier transform spectrometer will produce a relative improvement in signal-to-noise ratio, compared to an equivalent scanning monochromator, of the order of the square root of m, where m is the number of sample points comprising the spectrum. is wrong in my opinion. The improvement is a factor m = sqrt(m)*sqrt(m), and only one sqrt(m) is lost when moving to shot-noise dominated sources. Scummos (talk) 09:38, 19 April 2017 (UTC)

General comment

This article is very poor and even wrong in places.

1. Introduction is not good, as already noted
2. The primary domain in the Michelson interferometer is distance (difference in the distance light travels in the two arms). Only when the mirror moves at constant velocity can it be considered to be time. In far infrared FTIR the mirror is moved by a stepper motor. The Fourier co-domain of distance is wavenumber (e.g. cm^-1) not frequency.
3. The use of the term coherence is misleading as the light source is not a source of coherent radiation
4. No mention of the Connes advantage
5. No mention of the fast Fourier transform algorithm
6. No mention of FT mass spectrometer
7. Resolving power of the Michelson interferometer not adequately discussed. In fact Michelson attempted to resolve lines such as Hα in the Balmer series

I don't feel that I have enough expertice to re-write the article, but a re-write is definitely needed. Petergans 11:04, 24 March 2007 (UTC)

Merge FTIR Spectrometer

FTIR Spectrometer is a small orphan page in need of a home... merge it to here? Publicly Visible (talk) 20:23, 27 October 2009 (UTC)

Sounds good to me. --Steve (talk) 23:42, 27 October 2009 (UTC)

Agreed and done.ronningt (talk) 23:01, 28 April 2010 (UTC)

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This Hebrew page: https://he.wikipedia.org/wiki/%D7%A1%D7%A4%D7%A7%D7%98%D7%A8%D7%95%D7%A1%D7%A7%D7%95%D7%A4%D7%99%D7%99%D7%AA_%D7%A4%D7%95%D7%A8%D7%99%D7%99%D7%94 does not link to this page, and does link to another English page that seems the same. Should they be unified?147.236.176.90 (talk) 18:07, 29 January 2022 (UTC)