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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 38, Iss. 9 — Sep. 1, 1948
  • pp: 766–773

Formation of Optical Images by X-Rays

PAUL KIRKPATRICK and A. V. BAEZ  »View Author Affiliations


JOSA, Vol. 38, Issue 9, pp. 766-773 (1948)
http://dx.doi.org/10.1364/JOSA.38.000766


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Abstract

Several conceivable methods for the formation of optical images by x-rays are considered, and a method employing concave mirrors is adopted as the most promising. A concave spherical mirror receiving radiation at grazing incidence (a necessary arrangement with x-rays) images a point into a line in accordance with a focal length ƒ =Ri/2 where R is the radius of curvature and i the grazing angle. The image is subject to an aberration such that a ray reflected at the periphery of the mirror misses the focal point of central rays by a distance given approximately by S=1.5Mr2/R, where M is the magnification of the image and r is the radius of the mirror face. The theoretically possible resolving power is such as to resolve point objects separated by about 70A, a limit which is independent of the wave-length used. Point images of points and therefore extended images of extended objects may be produced by causing the radiation to reflect from two concave mirrors in series. Sample results are presented.

Citation
PAUL KIRKPATRICK and A. V. BAEZ, "Formation of Optical Images by X-Rays," J. Opt. Soc. Am. 38, 766-773 (1948)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-38-9-766


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References

  1. W. C. Roentgen, Sitzungsberichte der Würzburger Plhysikalischen-Medicinischen Gesellschaft (1895).
  2. Zworykin, Morton, Ramberg, Hillier, and Vance, Electron Optics and the Electron Microscope (John Wiley and Sons, New York, 1946), p. 111.
  3. W. Ehrenberg, Nature 160, 330 (1947). This brief communication describes the formation of line images by reflection of x-rays from a point source at a gilded glass plate which had been bent so as to form an approximate circular cylinder.
  4. Paul Kirkpatrick and A. V. Baez, Bull. Am. Phys. Soc. 23, 10 (1948).

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