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Proceedings Paper

Beating the optical Liouville theorem: How does geometrical optics know the second law of thermodynamics?
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Paper Abstract

It is well-known that conservation of phase-space volume or optical etendue leads to strict limits to concentration. Less well- known is the connection between entropy and etendue. Entropy has a logarithmic dependence on etendue in addition to the familiar linear dependence on heat. This trade-off permits in principle an exponential boost in concentration. Optical systems that make use of this possibility will be discussed.

Paper Details

Date Published: 28 August 2009
PDF: 3 pages
Proc. SPIE 7423, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration VI, 742309 (28 August 2009); doi: 10.1117/12.836029
Show Author Affiliations
Roland Winston, Univ. of California, Merced (United States)
Chunhua Wang, Univ. of California, Merced (United States)
Weiya Zhang, Univ. of California, Merced (United States)


Published in SPIE Proceedings Vol. 7423:
Nonimaging Optics: Efficient Design for Illumination and Solar Concentration VI
Roland Winston; Jeffrey M. Gordon, Editor(s)

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