---
aliases:
- /2013/01/elliptic-beams-fwhm-and-ellipticity
categories:
- astrophysics
date: 2013-01-18 00:58
layout: post
slug: elliptic-beams-fwhm-and-ellipticity
title: Elliptic beams, FWHM and ellipticity

---

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 The relationship between the Full Width Half Max, FWHM (min, max, and average) and the
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 ellipticity is:
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  FWHM = sqrt(FWHM_min * FWHM_max)
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  e = FWHM_max/FWHM_min
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