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Applied Optics

Applied Optics


  • Vol. 42, Iss. 4 — Feb. 1, 2003
  • pp: 719–723

Characteristics of the thick, compound refractive lens

Richard H. Pantell, Joseph Feinstein, H. Raul Beguiristain, Melvin A. Piestrup, Charles K. Gary, and Jay T. Cremer  »View Author Affiliations

Applied Optics, Vol. 42, Issue 4, pp. 719-723 (2003)

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A compound refractive lens (CRL), consisting of a series of N closely spaced lens elements each of which contributes a small fraction of the total focusing, can be used to focus x rays or neutrons. The thickness of a CRL can be comparable to its focal length, whereupon a thick-lens analysis must be performed. In contrast with the conventional optical lens, where the ray inside the lens follows a straight line, the ray inside the CRL is continually changing direction because of the multiple refracting surfaces. Thus the matrix representation for the thick CRL is quite different from that for the thick optical lens. Principal planes can be defined such that the thick-lens matrix can be converted to that of a thin lens. For a thick lens the focal length is greater than for a thin lens with the same lens curvature, but this lengthening effect is less for the CRL than for the conventional optical lens.

© 2003 Optical Society of America

OCIS Codes
(110.7440) Imaging systems : X-ray imaging
(140.7240) Lasers and laser optics : UV, EUV, and X-ray lasers
(180.7460) Microscopy : X-ray microscopy
(340.0340) X-ray optics : X-ray optics

Original Manuscript: April 5, 2002
Revised Manuscript: September 26, 2002
Published: February 1, 2003

Richard H. Pantell, Joseph Feinstein, H. Raul Beguiristain, Melvin A. Piestrup, Charles K. Gary, and Jay T. Cremer, "Characteristics of the thick, compound refractive lens," Appl. Opt. 42, 719-723 (2003)

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