Abstract

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.

© 1949 Optical Society of America

Analysis of Elliptical Polarization

M. Richartz and Hsien-Yü Hsü
J. Opt. Soc. Am. 39(2) 136-157 (1949)

X-Ray Optics: The Production of Converging Beams by Total Reflection

W. Ehrenberg
J. Opt. Soc. Am. 39(9) 741-746 (1949)

A Method of Measuring High Intensities at the Focus of a Parabolic Reflector with Large Relative Aperture

George E. Davis
J. Opt. Soc. Am. 39(7) 541-543 (1949)

The Production of Diffraction Gratings: II. The Design of Echelle Gratings and Spectrographs1

George R. Harrison
J. Opt. Soc. Am. 39(7) 522-528 (1949)

A New Series of Microscope Objectives: I. Catadioptric Newtonian Systems*

David S. Grey and Paul H. Lee
J. Opt. Soc. Am. 39(9) 719-722 (1949)