Talk:Fourier-transform spectroscopy
![]() | This article is rated Start-class on Wikipedia's content assessment scale. It is of interest to the following WikiProjects: | ||||||||||
|
![]() | This article provides insufficient context for those unfamiliar with the subject. |
SNR
editAs 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
editThis article is very poor and even wrong in places.
- Introduction is not good, as already noted
- 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.
- The use of the term coherence is misleading as the light source is not a source of coherent radiation
- No mention of the Connes advantage
- No mention of the fast Fourier transform algorithm
- No mention of FT mass spectrometer
- 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
editFTIR 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)
External links modified
editHello fellow Wikipedians,
I have just added archive links to 2 external links on Fourier transform spectroscopy. Please take a moment to review my edit. If necessary, add {{cbignore}}
after the link to keep me from modifying it. Alternatively, you can add {{nobots|deny=InternetArchiveBot}}
to keep me off the page altogether. I made the following changes:
- Added archive http://web.archive.org/web/20150208013406/http://www.astro.livjm.ac.uk/courses/phys362/notes/ to http://www.astro.livjm.ac.uk/courses/phys362/notes/
- Added archive http://web.archive.org/web/20070520020645/http://www.osa.org:80/meetings/topicalmeetings/fts/default.aspx to http://www.osa.org/meetings/topicalmeetings/fts/default.aspx
When you have finished reviewing my changes, please set the checked parameter below to true to let others know.
This message was posted before February 2018. After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than regular verification using the archive tool instructions below. Editors have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the RfC before doing mass systematic removals. This message is updated dynamically through the template {{source check}}
(last update: 5 June 2024).
- If you have discovered URLs which were erroneously considered dead by the bot, you can report them with this tool.
- If you found an error with any archives or the URLs themselves, you can fix them with this tool.
Cheers.—cyberbot IITalk to my owner:Online 17:10, 27 February 2016 (UTC)
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)