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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 30, Iss. 19 — Oct. 1, 2005
  • pp: 2617–2619

Planar concentrators near the étendue limit

Roland Winston and Jeffrey M. Gordon  »View Author Affiliations

Optics Letters, Vol. 30, Issue 19, pp. 2617-2619 (2005)

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Recently proposed aplanatic imaging designs are integrally combined with nonimaging flux boosters to produce an ultracompact planar glass-filled concentrator that performs near the étendue limit. Such optical devices are attractive for high-efficiency multijunction photovoltaics at high flux, with realistic power generation of 1 W from a 1 mm² cell. When deployed in reverse, our designs provide collimation even for high-numerical-aperture light sources.

© 2005 Optical Society of America

OCIS Codes
(220.1770) Optical design and fabrication : Concentrators
(350.6050) Other areas of optics : Solar energy

ToC Category:
Optical Design and Fabrication

Roland Winston and Jeffrey M. Gordon, "Planar concentrators near the étendue limit," Opt. Lett. 30, 2617-2619 (2005)

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  1. T. Takamoto, in International Solar Concentrator Conference for the Generation of Electricity or Hydrogen, Proc. NREL/CD-520-35349 (National Renewable Energy Laboratory, 2004).
  2. Spectrolab, Inc., 12500 Gladstone Avenue, Sylmar, California, www.spectrolab.com--technical prospectuses and private communications (2005).
  3. Z. I. Alferov and V. D. Rumyantsev, in Next Generation Photovoltaics, A.Martí and A.Luque, eds. (Institute of Physics, 2004), Chap. 2.
  4. J. M. Gordon and D. Feuermann, Appl. Opt. 44, 2327 (2005). [CrossRef]
  5. K. Schwarzschild, Abh. Akad. Wiss. Goettingen Math.-Phys. Kl. 4, Nos: 1-3 (1905-1906).
  6. R. Winston, J. C. Miñano, and P. Benítez, Nonimaging Optics (Elsevier, 2005).
  7. Two limiting cases are worth noting: (a) the theta1/theta2 concentrator is a cylinder (no concentration boost from the terminal stage), allowing higher NA1, for the coplanar design with the focal plane closer to the secondary; and (b) the aplanatic unit is without a terminal nonimaging concentrator, while retaining coplanarity as well as the focal plane at the vertex of the primary (concentration is still enhanced by a factor of n2 relative to the corresponding air-filled device).
  8. J. M. Gordon, E. A. Katz, D. Feuermann, and M. Huleihil, Appl. Phys. Lett. 84, 3642 (2004). [CrossRef]
  9. J. M. Gordon, E. A. Katz, W. Tassew, and D. Feuermann, Appl. Phys. Lett. 86, 073508 (2005). [CrossRef]
  10. K. Araki, H. Uozumi, and M. Yamaguchi, in 29th IEEE Photovoltaic Specialists Conference (IEEE, 2002), pp. 1568-1571.
  11. J. Sun, T. Israeli, T. A. Reddy, K. Scoles, J. M. Gordon, and D. Feuermann, J. Sol. Energy Eng. 127, 138 (2005). [CrossRef]

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