OSA's Digital Library

Applied Optics

Applied Optics


  • Vol. 36, Iss. 13 — May. 1, 1997
  • pp: 2869–2874

Extracting concentrated guided light

Harald Ries, Akiba Segal, and Jacob Karni  »View Author Affiliations

Applied Optics, Vol. 36, Issue 13, pp. 2869-2874 (1997)

View Full Text Article

Enhanced HTML    Acrobat PDF (280 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



The maximum concentration of radiation is proportional to the square of the refractive index of the medium in which it propagates. A medium with a high refractive index can also serve as a lightguide for concentrated radiation. However, if concentrated radiation is extracted from one medium, with a high refractive index, to another, whose index is lower (e.g., from fused silica into air), part of the radiation may be lost because of the total internal reflection at the interface. We present polygonal shapes suitable for efficient extraction of the concentrated radiation in a controllable way, without increasing the cross-section area (or diameter) of the lightguide. It is shown analytically and experimentally that the use of a secondary concentrator, followed by such a light extractor, both having a high refractive index, can provide considerably more power to a solar receiver with a specific aperture.

© 1997 Optical Society of America

Original Manuscript: April 22, 1996
Revised Manuscript: September 20, 1996
Published: May 1, 1997

Harald Ries, Akiba Segal, and Jacob Karni, "Extracting concentrated guided light," Appl. Opt. 36, 2869-2874 (1997)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. W. T. Welford, R. Winston, High Collection Non-Imaging Optics (Academic, New York, 1989).
  2. J. Karni, H. Ries, A. Segal, V. Krupkin, A. Yogev, “Delivery of radiation from a transparent medium,” International patent applicationPCT/US95/04915, Publication WO95/29415 (1995).
  3. H. Ries, W. Spirkl, R. Winston, “Cone and trumpet concentrators in the light of the general edge-ray theorem,” in Nonimaging Optics: Maximum Efficiency Light Transfer III, R. Winston, ed., Proc. SPIE2538, 10–15 (1995).
  4. H. Ries, A. Rabl, “The edge ray principle of nonimaging optics,” J. Opt. Soc. Am. A 11, 2627–2632 (1994). Also included in R. Winston, ed., Selected Papers in Nonimaging Optics, SPIE Milestone Series Vol. MS 106 (SPIE Optical Engineering Press, Bellingham, Mass., 1995).
  5. J. Karni, A. Kribus, P. Doron, A. Fiterman, D. Sagie, “The DIAPR; A high-pressure, high-temperature solar receiver,” ASME J. Sol. Energy Eng. 119 (February1997).
  6. D. Jenkins, R. Winston, J. Bliss, J. O’Gallagher, A. Lewandowski, C. Bingham, “Solar concentration of 50,000 achieved with output power approaching 1 kW,” ASME J. Sol. Energ. Eng. 118, 141–145 (1996). [CrossRef]

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited