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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 39, Iss. 6 — Jun. 1, 1949
  • pp: 497–497

Analysis of Para-Elliptic Reflector

BENJAMIN GOLDBERG and NELS C. BENSON  »View Author Affiliations

JOSA, Vol. 39, Issue 6, pp. 497-497 (1949)

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This paper presents an analysis of the para-elliptic reflector together with its possible applications when used as a searchlight mirror. The horizontal sections of a para-elliptic mirror are portions of ellipses and the vertical sections are parabolas. The mirror is so designed that each parabola lies in a vertical plane through the secondary focus of the horizontal ellipse which passes through the vertex of the mirror and each elliptical section lies in a plane parallel to that of the ellipse through the vertex of the mirror. A beam of light projected from such a reflector converges in the horizontal planes to a line common to the intersection of the vertical planes and then diverges as a spread beam horizontally with minimum spread vertically.

BENJAMIN GOLDBERG and NELS C. BENSON, "Analysis of Para-Elliptic Reflector," J. Opt. Soc. Am. 39, 497-497 (1949)

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