= Étendue (Photon Snacks) by R. John Koshel
{c}
{tag=Work by R. John Koshel}
{title2=2022}
By <R. John Koshel>.
Publisher: University of Arizona, Wyant College of Optical Sciences (institutional host of Photon Snacks / Light Bytes).
Online text: https://wp.optics.arizona.edu/jkoshel/wp-content/uploads/sites/78/2022/01/Photon-Snacks-11.pdf
Cited passages: Étendue, p. 1, equation (1.1): refractive-index-weighted projected-area integral; Étendue, pp. 1–2, lossless-system and entrance-pupil restrictions; p. 3, Figure 1, preserved generalized phase-space element.
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