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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 19, Iss. 2 — Jan. 15, 1980
  • pp: 195–197

Cavity enhancement by controlled directional scattering

Roland Winston  »View Author Affiliations


Applied Optics, Vol. 19, Issue 2, pp. 195-197 (1980)
http://dx.doi.org/10.1364/AO.19.000195


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History
Original Manuscript: October 19, 1979
Published: January 15, 1980

Citation
Roland Winston, "Cavity enhancement by controlled directional scattering," Appl. Opt. 19, 195-197 (1980)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-19-2-195


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References

  1. J. J. O’Gallagher, A. Rabl, R. Winston, W. McIntire, “Absorption Enhancement in Solar Collectors by Multiple Reflections,” Sol. Energy (in press).
  2. I. M. Bassett, G. H. Derrick, “An Upper Bound on the Efficiency of a Collector of Diffuse Radiation on a Gray Absorber,” Opt. Acta (in press).
  3. W. T. Welford, R. Winston, Optics of Nonimaging Concentrators (Academic, New York, 1978). In making statements of this kind we do not include the effects of imperfect reflectance of mirrors or transmittance of covers.
  4. R. Winston, W. T. Welford, J. Opt. Soc. Am. 68, 289 (1978). [CrossRef]
  5. R. Winston, Appl. Opt. 17, 1668 (1978). [CrossRef] [PubMed]
  6. Enclosures composed of perfectly diffuse reflecting walls have been discussed by I. M. Bassett, G. H. Derrick, “The Collection and Dissemination of Light with the aid of Diffuse Reflectors”, Opt. Acta (1979) (in press).
  7. W. McIntire, “New Reflector Design which Avoids Losses Through Gaps Between Tubular Absorbers and Reflectors”, preprint submitted to Sol. Energy.
  8. In the language of radiation transfer we want the blackbody radiation shape factor FABCD-ABCD to vanish. Then it is possible to have FABCD-R = 1 See, for example, E. M. Sparrow, R. D. Cess, Radiation Heat Transfer (Cole, Belmont, Calif., 1970).
  9. R. Winston, H. Hinterberger, Sol. Energy 17, 255 (1975). [CrossRef]
  10. D. E. Williamson, J. Opt. Soc. Am. 42, 712 (1952). [CrossRef]
  11. Notice that for this case, since we are working near the limit g ≈ r, set by Eq. (3), radiation starting from the receiver would mostly be reflected into directions outside the receiver as required by conservation of étendue.
  12. In case the condition h ≪ r is not met one should replace ϕ by α = sin−1 [r/(r + g + h)] in Eq. (4), where α is the half angle subtended by the receiver from the apex of the V-groove. Thus one first chooses α, then ψ, and finally h to complete the design.

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