Talk:Sellmeier equation
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The source of the sapphire and BK7 Sellmeier coefficients and coeffieicents for a bunch of other materials is: www.cvilaser.com/Common/PDFs/Dispersion_Equations.pdf
Sellmeier Coefficients edit
How are the Sellmeier coefficients determined?--TeakHoken193.187.211.118 (talk) 08:48, 18 August 2008 (UTC)
- I agree. It would help if these coefficients were explained more. Bernie Buddy (talk) 05:06, 5 October 2015 (UTC)
- They are fitted to experimental data. Usually standard non-linear least-square fitting methods are employed, with input being a value of index of refraction at about 50-100 different wavelengths, and using multiple samples, to perform simultaneous fitting. See Curve fitting for some (but not all) details. 81.6.34.246 (talk) 09:04, 7 January 2020 (UTC)
Fused Silica coefficients edit
I think it would be useful to add the coefficients for fused silica, however I'd first like someone to verify the numbers I have
| Coefficient | Value |
|---|---|
| B1 | 0.6961663 |
| B2 | 0.4079426 |
| B3 | 0.8974794 |
| C1 | 0.00467914825849 |
| C2 | 0.01351206307396 |
| C3 | 97.934002537921 |
With the source: http://www.rp-photonics.com/sellmeier_formula.html Matthew Rollings (talk) 18:33, 30 October 2008 (UTC)
- Looks to be correct, I found the same values at https://refractiveindex.info/?shelf=glass&book=fused_silica&page=Malitson and in the source https://doi.org/10.1364/JOSA.55.001205 (no need for full access, the abstract itself references the same values). 81.6.34.246 (talk) 09:02, 7 January 2020 (UTC)
correction to Schott TIE-29 reference (North America site, dated 2016... I don't know how to fix this) edit
parent site index https://www.us.schott.com/advanced_optics/english/knowledge-center/technical-articles-and-tools/tie.html?highlighted_text=TIE-29 link to pdf https://www.us.schott.com/d/advanced_optics/38cfacda-3e20-49d5-a432-d9066f56c05b/1.2/tie_29_refractive_index_and_dispersion_us.pdf — Preceding unsigned comment added by Shokutaku (talk • contribs) 19:06, 29 April 2019 (UTC)
Source of the Sellmeier equation edit
It is stated in the article that the relation is empirical. However, the original Sellmeier's article, as well as, "Fundamentals of Optics" by F.A. Jenkins and H. E. White lead to a conclusion that the result comes from theoretical exploration of light-matter interaction. Therefore, I propose to remove the mention of "empirical relationship". — Preceding unsigned comment added by Daniil1024 (talk • contribs) 14:25, 19 November 2020 (UTC)